{"as_of":"2026-08-22T18:18:00Z","caps":{"database_statements":6,"inbound":100,"outbound":100},"context_digest":"sha256:92b59a67a10c080a3fd6965f0df296a6b834928e32ddb4001d20b724d0b5dff1","coverage":[{"denominator":53,"lane":"reference_resolution","note":"Typed states for the displayed outbound observations.","records_observed":53,"source":"paper_references, paper_reference_links","source_observed_at":"2026-08-14T15:22:41.622758Z","state":"measured"},{"denominator":53,"lane":"standing_notices","note":"One-hop event checks from named stored sources.","records_observed":53,"source":"scholarly_work_events, retraction_status_cache","source_observed_at":"2026-08-22T06:32:14.747728+00:00","state":"measured"},{"denominator":0,"lane":"inbound_itemization","note":"Pith citing papers itemized under the disclosed page cap.","records_observed":0,"source":"paper_references, paper_reference_links","source_observed_at":null,"state":"measured"},{"denominator":1,"lane":"external_citation_measurements","note":"A source-named dated measurement, never combined with another source.","records_observed":0,"source":"cited_works","source_observed_at":null,"state":"measured"}],"external_citation_measurements":[],"inbound":[],"links":{"evidence":"/evidence","html":"/paper/1908.01335/citation-record","integrity":"/paper/1908.01335/integrity","json":"/paper/1908.01335/citation-record.json","paper":"/paper/1908.01335"},"outbound":[{"citation":{"cited_paper":{"arxiv_id":"1706.05959","last_updated":"2017-06-27T08:47:01Z","snapshot_observed_at":"2026-08-19T01:21:09.283869Z","submitted_at":"2017-06-16T09:49:57Z","title":"Cosmic Modesty","version":2},"cited_work":{"arxiv_id":"1706.05959","doi":null,"metadata_source":"pith","pith_arxiv_id":"1706.05959","snapshot_observed_at":"2026-08-14T15:22:42.538719Z","title":"Cosmic Modesty","venue":"physics.pop-ph","work_id":"cecd3025-5227-425d-835d-cf6fffe2821a","year":2017},"citing_paper":{"arxiv_id":"1908.01335","last_updated":"2019-08-04T12:50:36Z","snapshot_observed_at":"2026-08-19T01:20:58.863595Z","submitted_at":"2019-08-04T12:50:36Z","title":"Upper limit on the fraction of alien civilizations that develop communication technology","version":1},"reference_index":1,"source":"pdf_text","source_observed_at":"2026-08-14T15:22:41.411474Z"},"links":{"cited_paper":"/paper/1706.05959","citing_paper":"/paper/1908.01335"},"observation_digest":"sha256:98abfef3681f1195dc3e8073e987a7a630595ee3337327475c0fb1096baac4b1","observation_id":"d305fcb1-66e5-40d7-b0fe-8ecb644db77b","resolution":{"observed_at":"2026-08-14T15:22:42.542066Z","resolver_source":"local_arxiv","status":"verified_exact"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-22T06:32:14.747728+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-22T06:32:14.747728+00:00","source":"crossref"},{"observed_at":"2026-08-22T06:32:06.552537+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":"raw_reference","pith_arxiv_id":null,"snapshot_observed_at":"2026-08-14T15:22:42.607016Z","title":"Sagan, The cosmic connection, (Anchor Press, 1973)","venue":null,"work_id":"a8171a33-d560-4a70-91c8-a6284381f99f","year":1973},"citing_paper":{"arxiv_id":"1908.01335","last_updated":"2019-08-04T12:50:36Z","snapshot_observed_at":"2026-08-19T01:20:58.863595Z","submitted_at":"2019-08-04T12:50:36Z","title":"Upper limit on the fraction of alien civilizations that develop communication technology","version":1},"reference_index":2,"source":"pdf_text","source_observed_at":"2026-08-14T15:22:41.416903Z"},"links":{"citing_paper":"/paper/1908.01335"},"observation_digest":"sha256:c9cd11281fd038a9be4a740f9ca0fb8fb4e4dbe6bf9e01e021139ffa40ab683e","observation_id":"4b2a89b2-f400-4667-b616-8d3e10e02aa5","resolution":{"observed_at":"2026-08-14T15:22:42.611217Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-22T06:32:14.747728+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-22T06:32:14.747728+00:00","source":"crossref"},{"observed_at":"2026-08-22T06:32:06.552537+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":"raw_reference","pith_arxiv_id":null,"snapshot_observed_at":"2026-08-14T15:22:42.595608Z","title":null,"venue":null,"work_id":"624b8db8-51a8-42de-8cc5-932edf3a94fe","year":1965},"citing_paper":{"arxiv_id":"1908.01335","last_updated":"2019-08-04T12:50:36Z","snapshot_observed_at":"2026-08-19T01:20:58.863595Z","submitted_at":"2019-08-04T12:50:36Z","title":"Upper limit on the fraction of alien civilizations that develop communication technology","version":1},"reference_index":3,"source":"pdf_text","source_observed_at":"2026-08-14T15:22:41.421475Z"},"links":{"citing_paper":"/paper/1908.01335"},"observation_digest":"sha256:c6fa907ab2555ca24c9b9913ef7ad4a6100ea2bda2317ac393ffb9be4aa6d931","observation_id":"30f670b8-2bc8-4cd9-bf10-28b42d08c133","resolution":{"observed_at":"2026-08-14T15:22:42.599772Z","resolver_source":"raw_fallback","status":"unresolved"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-22T06:32:14.747728+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-22T06:32:14.747728+00:00","source":"crossref"},{"observed_at":"2026-08-22T06:32:06.552537+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":{"arxiv_id":"1301.6411","last_updated":"2013-02-26T18:38:47Z","snapshot_observed_at":"2026-08-19T01:21:04.333217Z","submitted_at":"2013-01-27T23:06:31Z","title":"A joint analysis of the Drake equation and the Fermi paradox","version":2},"cited_work":{"arxiv_id":"1301.6411","doi":null,"metadata_source":"pith","pith_arxiv_id":"1301.6411","snapshot_observed_at":"2026-08-14T15:22:42.525202Z","title":"A joint analysis of the Drake equation and the Fermi paradox","venue":"physics.pop-ph","work_id":"c1acdf8b-dac4-4922-aeb4-ed300a5e6e25","year":2013},"citing_paper":{"arxiv_id":"1908.01335","last_updated":"2019-08-04T12:50:36Z","snapshot_observed_at":"2026-08-19T01:20:58.863595Z","submitted_at":"2019-08-04T12:50:36Z","title":"Upper limit on the fraction of alien civilizations that develop communication technology","version":1},"reference_index":4,"source":"pdf_text","source_observed_at":"2026-08-14T15:22:41.426420Z"},"links":{"cited_paper":"/paper/1301.6411","citing_paper":"/paper/1908.01335"},"observation_digest":"sha256:1daa876c3fbf01cfc97fb535666d69f4d3ff97e9d987ea557cdcbed3ed9c3045","observation_id":"60aa0e7b-c728-4110-82d0-921710836c4c","resolution":{"observed_at":"2026-08-14T15:22:42.528850Z","resolver_source":"local_arxiv","status":"verified_exact"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-22T06:32:14.747728+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-22T06:32:14.747728+00:00","source":"crossref"},{"observed_at":"2026-08-22T06:32:06.552537+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":{"arxiv_id":"1706.01907","last_updated":"2019-08-03T19:18:40Z","snapshot_observed_at":"2026-08-19T01:21:10.400036Z","submitted_at":"2017-06-06T18:11:22Z","title":"Is there anybody out there?","version":3},"cited_work":{"arxiv_id":"1706.01907","doi":null,"metadata_source":"pith","pith_arxiv_id":"1706.01907","snapshot_observed_at":"2026-08-14T15:22:42.508907Z","title":"Is there anybody out there?","venue":"astro-ph.HE","work_id":"792e377c-5363-448a-9191-6103795f936c","year":2017},"citing_paper":{"arxiv_id":"1908.01335","last_updated":"2019-08-04T12:50:36Z","snapshot_observed_at":"2026-08-19T01:20:58.863595Z","submitted_at":"2019-08-04T12:50:36Z","title":"Upper limit on the fraction of alien civilizations that develop communication technology","version":1},"reference_index":5,"source":"pdf_text","source_observed_at":"2026-08-14T15:22:41.430513Z"},"links":{"cited_paper":"/paper/1706.01907","citing_paper":"/paper/1908.01335"},"observation_digest":"sha256:0e29ddae0e60c561f96e511604d8df66bf5afb4213231c1d142df825a293e799","observation_id":"270c7880-bd93-410d-b9c3-99101bbb7de9","resolution":{"observed_at":"2026-08-14T15:22:42.512797Z","resolver_source":"local_arxiv","status":"verified_exact"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-22T06:32:14.747728+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-22T06:32:14.747728+00:00","source":"crossref"},{"observed_at":"2026-08-22T06:32:06.552537+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":{"arxiv_id":"1812.06606","last_updated":"2018-12-17T04:03:11Z","snapshot_observed_at":"2026-08-15T15:16:04.690021Z","submitted_at":"2018-12-17T04:03:11Z","title":"Albedos, Equilibrium Temperatures, and Surface Temperatures of Habitable Planets","version":1},"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":"1812.06606","snapshot_observed_at":"2026-08-14T15:22:41.435865Z","title":null,"venue":null,"work_id":null,"year":null},"citing_paper":{"arxiv_id":"1908.01335","last_updated":"2019-08-04T12:50:36Z","snapshot_observed_at":"2026-08-19T01:20:58.863595Z","submitted_at":"2019-08-04T12:50:36Z","title":"Upper limit on the fraction of alien civilizations that develop communication technology","version":1},"reference_index":6,"source":"pdf_text","source_observed_at":"2026-08-14T15:22:41.435865Z"},"links":{"cited_paper":"/paper/1812.06606","citing_paper":"/paper/1908.01335"},"observation_digest":"sha256:f640a8ee93ed1b771080b844760b988ff9f4a6bc057d9a0a8d0d450ae34a956c","observation_id":"bb816c1e-d6be-4c66-b28f-3e307e088d50","resolution":{"observed_at":"2026-08-14T15:22:41.435865Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":{"arxiv_id":"1606.08926","last_updated":"2016-11-24T17:53:41Z","snapshot_observed_at":"2026-08-20T16:17:47.411969Z","submitted_at":"2016-06-29T01:01:50Z","title":"On the Habitability of Our Universe","version":2},"cited_work":{"arxiv_id":"1606.08926","doi":null,"metadata_source":"pith","pith_arxiv_id":"1606.08926","snapshot_observed_at":"2026-08-14T15:22:42.484053Z","title":"On the Habitability of Our Universe","venue":"astro-ph.CO","work_id":"61aa788b-2085-41fe-8430-94a1b5af9cc2","year":2016},"citing_paper":{"arxiv_id":"1908.01335","last_updated":"2019-08-04T12:50:36Z","snapshot_observed_at":"2026-08-19T01:20:58.863595Z","submitted_at":"2019-08-04T12:50:36Z","title":"Upper limit on the fraction of alien civilizations that develop communication technology","version":1},"reference_index":7,"source":"pdf_text","source_observed_at":"2026-08-14T15:22:41.440277Z"},"links":{"cited_paper":"/paper/1606.08926","citing_paper":"/paper/1908.01335"},"observation_digest":"sha256:e5f7e10c0d618991279be59e859805795e7fda39d2158279f5e41c2ee4e4cdc5","observation_id":"158546ba-0f9a-4512-8b25-687ca33efbbb","resolution":{"observed_at":"2026-08-14T15:22:42.487661Z","resolver_source":"local_arxiv","status":"verified_exact"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-22T06:32:14.747728+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-22T06:32:14.747728+00:00","source":"crossref"},{"observed_at":"2026-08-22T06:32:06.552537+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":null,"snapshot_observed_at":"2026-08-14T15:22:41.444566Z","title":"Seager, Exoplanet habitability, Science, 340, 577 (2013) doi: 10.1126/science.1232226","venue":null,"work_id":null,"year":2013},"citing_paper":{"arxiv_id":"1908.01335","last_updated":"2019-08-04T12:50:36Z","snapshot_observed_at":"2026-08-19T01:20:58.863595Z","submitted_at":"2019-08-04T12:50:36Z","title":"Upper limit on the fraction of alien civilizations that develop communication technology","version":1},"reference_index":8,"source":"pdf_text","source_observed_at":"2026-08-14T15:22:41.444566Z"},"links":{"citing_paper":"/paper/1908.01335"},"observation_digest":"sha256:8e1e7db629e70a7c86baf0b728e294c5b3cfef9a49de2faf724627884d864646","observation_id":"e3dd01b4-d58a-48ca-a6bb-c2c4c3b2bb06","resolution":{"observed_at":"2026-08-14T15:22:41.444566Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":null,"snapshot_observed_at":"2026-08-14T15:22:41.448168Z","title":null,"venue":null,"work_id":null,"year":2010},"citing_paper":{"arxiv_id":"1908.01335","last_updated":"2019-08-04T12:50:36Z","snapshot_observed_at":"2026-08-19T01:20:58.863595Z","submitted_at":"2019-08-04T12:50:36Z","title":"Upper limit on the fraction of alien civilizations that develop communication technology","version":1},"reference_index":9,"source":"pdf_text","source_observed_at":"2026-08-14T15:22:41.448168Z"},"links":{"citing_paper":"/paper/1908.01335"},"observation_digest":"sha256:8467847604fc26aa6c0e8ec0a057f416190a51b8acf854b966e187d69deda28b","observation_id":"bc33eb49-3768-44da-9242-a275ea9bcc09","resolution":{"observed_at":"2026-08-14T15:22:41.448168Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":{"arxiv_id":"1102.0541","last_updated":"2011-03-12T05:03:32Z","snapshot_observed_at":"2026-08-15T06:40:34.393666Z","submitted_at":"2011-02-02T20:04:55Z","title":"Characteristics of planetary candidates observed by Kepler, II: Analysis of the first four months of data","version":2},"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":"1102.0541","snapshot_observed_at":"2026-08-14T15:22:41.452107Z","title":null,"venue":null,"work_id":null,"year":2011},"citing_paper":{"arxiv_id":"1908.01335","last_updated":"2019-08-04T12:50:36Z","snapshot_observed_at":"2026-08-19T01:20:58.863595Z","submitted_at":"2019-08-04T12:50:36Z","title":"Upper limit on the fraction of alien civilizations that develop communication technology","version":1},"reference_index":10,"source":"pdf_text","source_observed_at":"2026-08-14T15:22:41.452107Z"},"links":{"cited_paper":"/paper/1102.0541","citing_paper":"/paper/1908.01335"},"observation_digest":"sha256:e1935a33a4f5dda4fbd736c16838053574e35cb9694e62f571d19f722cc5bfaa","observation_id":"e7b1e30a-02f0-440b-b0ca-50c7962160a4","resolution":{"observed_at":"2026-08-14T15:22:41.452107Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":{"arxiv_id":"1202.5852","last_updated":"2012-02-27T08:34:01Z","snapshot_observed_at":"2026-08-15T04:18:04.010802Z","submitted_at":"2012-02-27T08:34:01Z","title":"Planetary Candidates Observed by Kepler, III: Analysis of the First 16 Months of Data","version":1},"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":"1202.5852","snapshot_observed_at":"2026-08-14T15:22:41.456851Z","title":null,"venue":null,"work_id":null,"year":2013},"citing_paper":{"arxiv_id":"1908.01335","last_updated":"2019-08-04T12:50:36Z","snapshot_observed_at":"2026-08-19T01:20:58.863595Z","submitted_at":"2019-08-04T12:50:36Z","title":"Upper limit on the fraction of alien civilizations that develop communication technology","version":1},"reference_index":11,"source":"pdf_text","source_observed_at":"2026-08-14T15:22:41.456851Z"},"links":{"cited_paper":"/paper/1202.5852","citing_paper":"/paper/1908.01335"},"observation_digest":"sha256:2237f5f4286cdaabc9f670dd9a94b44aa1c9e51481b3e8044231556ce2336380","observation_id":"533a9fd4-168a-42d1-a672-8049b59623a3","resolution":{"observed_at":"2026-08-14T15:22:41.456851Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":{"arxiv_id":"1302.1647","last_updated":"2013-02-22T16:23:37Z","snapshot_observed_at":"2026-08-15T02:17:13.730711Z","submitted_at":"2013-02-07T06:07:06Z","title":"The Occurrence Rate of Small Planets around Small Stars","version":2},"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":"1302.1647","snapshot_observed_at":"2026-08-14T15:22:41.460561Z","title":null,"venue":null,"work_id":null,"year":2013},"citing_paper":{"arxiv_id":"1908.01335","last_updated":"2019-08-04T12:50:36Z","snapshot_observed_at":"2026-08-19T01:20:58.863595Z","submitted_at":"2019-08-04T12:50:36Z","title":"Upper limit on the fraction of alien civilizations that develop communication technology","version":1},"reference_index":12,"source":"pdf_text","source_observed_at":"2026-08-14T15:22:41.460561Z"},"links":{"cited_paper":"/paper/1302.1647","citing_paper":"/paper/1908.01335"},"observation_digest":"sha256:444fcb57906ccd4615566ae0e10fd80ec1051f719ec92a272759ced43b45e206","observation_id":"061b1844-209f-41d0-9527-93e5b31c3d77","resolution":{"observed_at":"2026-08-14T15:22:41.460561Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":{"arxiv_id":"1303.2649","last_updated":"2013-03-11T19:58:03Z","snapshot_observed_at":"2026-08-20T12:11:10.960169Z","submitted_at":"2013-03-11T19:58:03Z","title":"A revised estimate of the occurrence rate of terrestrial planets in the habitable zones around kepler m-dwarfs","version":1},"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":"1303.2649","snapshot_observed_at":"2026-08-14T15:22:41.464264Z","title":null,"venue":null,"work_id":null,"year":2013},"citing_paper":{"arxiv_id":"1908.01335","last_updated":"2019-08-04T12:50:36Z","snapshot_observed_at":"2026-08-19T01:20:58.863595Z","submitted_at":"2019-08-04T12:50:36Z","title":"Upper limit on the fraction of alien civilizations that develop communication technology","version":1},"reference_index":13,"source":"pdf_text","source_observed_at":"2026-08-14T15:22:41.464264Z"},"links":{"cited_paper":"/paper/1303.2649","citing_paper":"/paper/1908.01335"},"observation_digest":"sha256:056ce2aaa60de700326ce21a01492810d3edaddc0d940798305589cf313e1f96","observation_id":"41812b75-52b1-4b7f-87da-1dc63c704047","resolution":{"observed_at":"2026-08-14T15:22:41.464264Z","resolver_source":null,"status":"malformed_identifier"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":{"arxiv_id":"1711.09908","last_updated":"2018-04-05T16:27:35Z","snapshot_observed_at":"2026-08-19T07:12:50.525039Z","submitted_at":"2017-11-27T19:00:02Z","title":"Subsurface Exolife","version":3},"cited_work":{"arxiv_id":"1711.09908","doi":null,"metadata_source":"pith","pith_arxiv_id":"1711.09908","snapshot_observed_at":"2026-08-14T15:22:42.430181Z","title":"Subsurface Exolife","venue":"astro-ph.EP","work_id":"1fb16b11-ce7c-4cc4-b320-505a49fa610b","year":2017},"citing_paper":{"arxiv_id":"1908.01335","last_updated":"2019-08-04T12:50:36Z","snapshot_observed_at":"2026-08-19T01:20:58.863595Z","submitted_at":"2019-08-04T12:50:36Z","title":"Upper limit on the fraction of alien civilizations that develop communication technology","version":1},"reference_index":14,"source":"pdf_text","source_observed_at":"2026-08-14T15:22:41.468505Z"},"links":{"cited_paper":"/paper/1711.09908","citing_paper":"/paper/1908.01335"},"observation_digest":"sha256:1d8244fd78a0790edf1d6a42116797a88a166317859dd0786ea300ac390fb169","observation_id":"56dee30f-83f5-447b-aaf6-3f307ed44c51","resolution":{"observed_at":"2026-08-14T15:22:42.434888Z","resolver_source":"local_arxiv","status":"malformed_identifier"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-22T06:32:14.747728+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-22T06:32:14.747728+00:00","source":"crossref"},{"observed_at":"2026-08-22T06:32:06.552537+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":"raw_reference","pith_arxiv_id":null,"snapshot_observed_at":"2026-08-14T15:22:42.585838Z","title":null,"venue":null,"work_id":"7103f025-6572-4037-8a16-3ec42dea8a0e","year":null},"citing_paper":{"arxiv_id":"1908.01335","last_updated":"2019-08-04T12:50:36Z","snapshot_observed_at":"2026-08-19T01:20:58.863595Z","submitted_at":"2019-08-04T12:50:36Z","title":"Upper limit on the fraction of alien civilizations that develop communication technology","version":1},"reference_index":15,"source":"pdf_text","source_observed_at":"2026-08-14T15:22:41.473192Z"},"links":{"citing_paper":"/paper/1908.01335"},"observation_digest":"sha256:72684780517c89099faa52c99e534bc58a2427a714b32691acf55d5899a54bab","observation_id":"e80bbf73-9a51-4b2d-a850-008929cca801","resolution":{"observed_at":"2026-08-14T15:22:42.589092Z","resolver_source":"raw_fallback","status":"unresolved"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-22T06:32:14.747728+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-22T06:32:14.747728+00:00","source":"crossref"},{"observed_at":"2026-08-22T06:32:06.552537+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":"raw_reference","pith_arxiv_id":null,"snapshot_observed_at":"2026-08-14T15:22:42.574636Z","title":null,"venue":null,"work_id":"a3906eb1-3f98-434b-97bf-10b699a50b6e","year":null},"citing_paper":{"arxiv_id":"1908.01335","last_updated":"2019-08-04T12:50:36Z","snapshot_observed_at":"2026-08-19T01:20:58.863595Z","submitted_at":"2019-08-04T12:50:36Z","title":"Upper limit on the fraction of alien civilizations that develop communication technology","version":1},"reference_index":16,"source":"pdf_text","source_observed_at":"2026-08-14T15:22:41.477264Z"},"links":{"citing_paper":"/paper/1908.01335"},"observation_digest":"sha256:1a73f590a1f291313c1d9b0d6b3ccce9819b2d3cdf330b23cca643841e8cbf7b","observation_id":"ad60575e-e32e-465a-a0de-729ebbb05e6e","resolution":{"observed_at":"2026-08-14T15:22:42.577965Z","resolver_source":"raw_fallback","status":"unresolved"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-22T06:32:14.747728+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-22T06:32:14.747728+00:00","source":"crossref"},{"observed_at":"2026-08-22T06:32:06.552537+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":null,"snapshot_observed_at":"2026-08-14T15:22:41.480797Z","title":"Schulze-Makuch and L","venue":null,"work_id":null,"year":2006},"citing_paper":{"arxiv_id":"1908.01335","last_updated":"2019-08-04T12:50:36Z","snapshot_observed_at":"2026-08-19T01:20:58.863595Z","submitted_at":"2019-08-04T12:50:36Z","title":"Upper limit on the fraction of alien civilizations that develop communication technology","version":1},"reference_index":17,"source":"pdf_text","source_observed_at":"2026-08-14T15:22:41.480797Z"},"links":{"citing_paper":"/paper/1908.01335"},"observation_digest":"sha256:257a27b9b2ef94a80a506e0aee5c7e875cd21599b3d0294effa728d175c52526","observation_id":"ae759a0e-9ae8-42de-996e-e6cd3908e0c5","resolution":{"observed_at":"2026-08-14T15:22:41.480797Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":"10.1089/153110704323175124","metadata_source":"doi_reference","pith_arxiv_id":null,"snapshot_observed_at":"2026-08-14T15:22:41.699170Z","title":"Bains, Many chemistries could be used to build living systems, Astrobiology 4, 137 (2004) doi:10.1089/153110704323175124","venue":null,"work_id":"a7a677dc-affb-45ee-9fac-4f25fc46e47d","year":2004},"citing_paper":{"arxiv_id":"1908.01335","last_updated":"2019-08-04T12:50:36Z","snapshot_observed_at":"2026-08-19T01:20:58.863595Z","submitted_at":"2019-08-04T12:50:36Z","title":"Upper limit on the fraction of alien civilizations that develop communication technology","version":1},"reference_index":18,"source":"pdf_text","source_observed_at":"2026-08-14T15:22:41.484765Z"},"links":{"citing_paper":"/paper/1908.01335"},"observation_digest":"sha256:fdd27b16bc4fe6a1d8e4adc4310dbdcc2eff3f5fa773b0809f444c0051e3e033","observation_id":"e77fd9a8-df33-4170-a07a-7a08f0405079","resolution":{"observed_at":"2026-08-14T15:22:41.702918Z","resolver_source":"doi","status":"verified_exact"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-22T06:32:14.747728+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-22T06:32:14.747728+00:00","source":"crossref"},{"observed_at":"2026-08-22T06:32:06.552537+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":"10.1016/s0277-5387(01)01017-8","metadata_source":"doi_reference","pith_arxiv_id":null,"snapshot_observed_at":"2026-08-14T15:22:41.686873Z","title":"West, Multiple bonds to silicon: 20 years later, Polyhe- dron 21, 467 (2002) doi: 10.1016/S0277-5387(01)01017-8","venue":null,"work_id":"a0417e30-02ac-4fac-bb22-0504088ef96e","year":2002},"citing_paper":{"arxiv_id":"1908.01335","last_updated":"2019-08-04T12:50:36Z","snapshot_observed_at":"2026-08-19T01:20:58.863595Z","submitted_at":"2019-08-04T12:50:36Z","title":"Upper limit on the fraction of alien civilizations that develop communication technology","version":1},"reference_index":19,"source":"pdf_text","source_observed_at":"2026-08-14T15:22:41.488426Z"},"links":{"citing_paper":"/paper/1908.01335"},"observation_digest":"sha256:cc2fa4a9305dee9bbb0de038ad097020b37420775f0f7fe7325d47ac0ff08381","observation_id":"aca7f93d-5101-4311-b93c-5daed5113cb6","resolution":{"observed_at":"2026-08-14T15:22:41.691293Z","resolver_source":"doi","status":"verified_exact"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-22T06:32:14.747728+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-22T06:32:14.747728+00:00","source":"crossref"},{"observed_at":"2026-08-22T06:32:06.552537+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":"raw_reference","pith_arxiv_id":null,"snapshot_observed_at":"2026-08-14T15:22:42.561358Z","title":"Lickiss, The synthesis and structures of organosilanols Adv","venue":null,"work_id":"4e881c8b-a06a-40e7-a499-8d2d8bd75cb8","year":1995},"citing_paper":{"arxiv_id":"1908.01335","last_updated":"2019-08-04T12:50:36Z","snapshot_observed_at":"2026-08-19T01:20:58.863595Z","submitted_at":"2019-08-04T12:50:36Z","title":"Upper limit on the fraction of alien civilizations that develop communication technology","version":1},"reference_index":20,"source":"pdf_text","source_observed_at":"2026-08-14T15:22:41.492236Z"},"links":{"citing_paper":"/paper/1908.01335"},"observation_digest":"sha256:eb23b04618e30b72a80d52e60cf003eb1ae93cefd3d6fb4aebcac59e65eb76cb","observation_id":"7a754f93-9db7-4991-b499-0b227530a759","resolution":{"observed_at":"2026-08-14T15:22:42.566022Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-22T06:32:14.747728+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-22T06:32:14.747728+00:00","source":"crossref"},{"observed_at":"2026-08-22T06:32:06.552537+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":"10.1021/acs.nanolett.6b02858","metadata_source":"doi_reference","pith_arxiv_id":null,"snapshot_observed_at":"2026-08-14T15:22:41.673901Z","title":"Okazaki, T","venue":null,"work_id":"970dc32a-a730-4a8c-853a-dfaf551095d8","year":2016},"citing_paper":{"arxiv_id":"1908.01335","last_updated":"2019-08-04T12:50:36Z","snapshot_observed_at":"2026-08-19T01:20:58.863595Z","submitted_at":"2019-08-04T12:50:36Z","title":"Upper limit on the fraction of alien civilizations that develop communication technology","version":1},"reference_index":21,"source":"pdf_text","source_observed_at":"2026-08-14T15:22:41.495513Z"},"links":{"citing_paper":"/paper/1908.01335"},"observation_digest":"sha256:e715a0760f93491eae06413991d653837d830811ab99adc989667f7baa3bd882","observation_id":"56f87412-c79c-4e2f-b2d1-84414cc43977","resolution":{"observed_at":"2026-08-14T15:22:41.677930Z","resolver_source":"doi","status":"verified_exact"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-22T06:32:14.747728+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-22T06:32:14.747728+00:00","source":"crossref"},{"observed_at":"2026-08-22T06:32:06.552537+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":null,"snapshot_observed_at":"2026-08-14T15:22:41.498833Z","title":null,"venue":null,"work_id":null,"year":1989},"citing_paper":{"arxiv_id":"1908.01335","last_updated":"2019-08-04T12:50:36Z","snapshot_observed_at":"2026-08-19T01:20:58.863595Z","submitted_at":"2019-08-04T12:50:36Z","title":"Upper limit on the fraction of alien civilizations that develop communication technology","version":1},"reference_index":22,"source":"pdf_text","source_observed_at":"2026-08-14T15:22:41.498833Z"},"links":{"citing_paper":"/paper/1908.01335"},"observation_digest":"sha256:6134e2bda5e69c8d8408a0c9f3b399cf4046b24664c10c718c9e93961f676c4f","observation_id":"c175b8a8-21b3-4205-b602-a928aad102cf","resolution":{"observed_at":"2026-08-14T15:22:41.498833Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":"10.1029/gl017i010p01765","metadata_source":"doi_reference","pith_arxiv_id":null,"snapshot_observed_at":"2026-08-14T15:22:41.661579Z","title":null,"venue":null,"work_id":"5fc80c29-f9b1-43e3-bb54-e99cbef71192","year":1990},"citing_paper":{"arxiv_id":"1908.01335","last_updated":"2019-08-04T12:50:36Z","snapshot_observed_at":"2026-08-19T01:20:58.863595Z","submitted_at":"2019-08-04T12:50:36Z","title":"Upper limit on the fraction of alien civilizations that develop communication technology","version":1},"reference_index":23,"source":"pdf_text","source_observed_at":"2026-08-14T15:22:41.502227Z"},"links":{"citing_paper":"/paper/1908.01335"},"observation_digest":"sha256:29fcaf930c5e0d1143a0e2855290fe30fb47b460b93f1aa27b04f22888ea27f0","observation_id":"50a6b582-7a5a-4c59-8d10-309352a5d604","resolution":{"observed_at":"2026-08-14T15:22:41.666136Z","resolver_source":"doi","status":"verified_exact"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-22T06:32:14.747728+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-22T06:32:14.747728+00:00","source":"crossref"},{"observed_at":"2026-08-22T06:32:06.552537+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":"0193.00124","doi":null,"metadata_source":"raw_reference","pith_arxiv_id":null,"snapshot_observed_at":"2026-08-14T15:22:42.352805Z","title":null,"venue":null,"work_id":"1c8d911a-c643-4494-9f77-5e45428fbd60","year":1993},"citing_paper":{"arxiv_id":"1908.01335","last_updated":"2019-08-04T12:50:36Z","snapshot_observed_at":"2026-08-19T01:20:58.863595Z","submitted_at":"2019-08-04T12:50:36Z","title":"Upper limit on the fraction of alien civilizations that develop communication technology","version":1},"reference_index":24,"source":"pdf_text","source_observed_at":"2026-08-14T15:22:41.506556Z"},"links":{"citing_paper":"/paper/1908.01335"},"observation_digest":"sha256:deb9ae6199ffbc06b2001e26c1b424b9a7f7efe6afbf2f21768be3848936cd43","observation_id":"fefa1f5d-2d6c-46ec-8b19-ca57f3942d4b","resolution":{"observed_at":"2026-08-14T15:22:42.358661Z","resolver_source":"raw_fallback","status":"metadata_mismatch"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-22T06:32:14.747728+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-22T06:32:14.747728+00:00","source":"crossref"},{"observed_at":"2026-08-22T06:32:06.552537+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":{"arxiv_id":"astro-ph/0304382","last_updated":"2003-07-09T01:38:17Z","snapshot_observed_at":"2026-08-14T16:34:27.563513Z","submitted_at":"2003-04-22T15:16:01Z","title":"Galactic Stellar and Substellar Initial Mass Function","version":2},"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":"astro-ph/0304382","snapshot_observed_at":"2026-08-14T15:22:41.509591Z","title":"Chabrier, Galactic stellar and substellar initial mass function, Publ","venue":null,"work_id":null,"year":2003},"citing_paper":{"arxiv_id":"1908.01335","last_updated":"2019-08-04T12:50:36Z","snapshot_observed_at":"2026-08-19T01:20:58.863595Z","submitted_at":"2019-08-04T12:50:36Z","title":"Upper limit on the fraction of alien civilizations that develop communication technology","version":1},"reference_index":25,"source":"pdf_text","source_observed_at":"2026-08-14T15:22:41.509591Z"},"links":{"cited_paper":"/paper/astro-ph/0304382","citing_paper":"/paper/1908.01335"},"observation_digest":"sha256:d234adf052f266aa5b8b468fec8707defef77c97b3f333c3bae7b5dee1d3ca28","observation_id":"22e0510b-8331-4b51-bfeb-34abac96bcc1","resolution":{"observed_at":"2026-08-14T15:22:41.509591Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":{"arxiv_id":"0805.2962","last_updated":"2008-10-21T19:56:09Z","snapshot_observed_at":"2026-08-17T05:36:58.182895Z","submitted_at":"2008-05-19T22:35:56Z","title":"A comprehensive comparison of the Sun to other stars: searching for self-selection effects","version":3},"cited_work":{"arxiv_id":"0805.2962","doi":null,"metadata_source":"pith","pith_arxiv_id":"0805.2962","snapshot_observed_at":"2026-08-14T15:22:42.277282Z","title":"A comprehensive comparison of the Sun to other stars: searching for self-selection effects","venue":"astro-ph","work_id":"4b3574c0-1a00-45c6-b387-fd7dd5b7a541","year":2008},"citing_paper":{"arxiv_id":"1908.01335","last_updated":"2019-08-04T12:50:36Z","snapshot_observed_at":"2026-08-19T01:20:58.863595Z","submitted_at":"2019-08-04T12:50:36Z","title":"Upper limit on the fraction of alien civilizations that develop communication technology","version":1},"reference_index":26,"source":"pdf_text","source_observed_at":"2026-08-14T15:22:41.513523Z"},"links":{"cited_paper":"/paper/0805.2962","citing_paper":"/paper/1908.01335"},"observation_digest":"sha256:e209cb07093d07a842ccb32b40821dda9c4c6e330b833edccdbcf76932fa2eb8","observation_id":"dd26a4b7-e787-45c0-ad6a-5272cfda548d","resolution":{"observed_at":"2026-08-14T15:22:42.280974Z","resolver_source":"local_arxiv","status":"verified_exact"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-22T06:32:14.747728+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-22T06:32:14.747728+00:00","source":"crossref"},{"observed_at":"2026-08-22T06:32:06.552537+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":null,"snapshot_observed_at":"2026-08-14T15:22:41.517691Z","title":null,"venue":null,"work_id":null,"year":2007},"citing_paper":{"arxiv_id":"1908.01335","last_updated":"2019-08-04T12:50:36Z","snapshot_observed_at":"2026-08-19T01:20:58.863595Z","submitted_at":"2019-08-04T12:50:36Z","title":"Upper limit on the fraction of alien civilizations that develop communication technology","version":1},"reference_index":27,"source":"pdf_text","source_observed_at":"2026-08-14T15:22:41.517691Z"},"links":{"citing_paper":"/paper/1908.01335"},"observation_digest":"sha256:202e04c642620913834906d1d1d60b2148a6cef08696250c9442ec8378dc9ece","observation_id":"1f70d0c9-5a83-495c-9b31-bf964c77b89d","resolution":{"observed_at":"2026-08-14T15:22:41.517691Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":{"arxiv_id":"astro-ph/9701131","last_updated":"1997-01-18T21:11:04Z","snapshot_observed_at":"2026-08-19T01:29:50.625799Z","submitted_at":"1997-01-18T21:11:04Z","title":"A Dying Universe: The Long Term Fate and Evolution of Astrophysical Objects","version":1},"cited_work":{"arxiv_id":"astro-ph/9701131","doi":null,"metadata_source":"pith","pith_arxiv_id":"astro-ph/9701131","snapshot_observed_at":"2026-08-14T15:22:42.195575Z","title":"A Dying Universe: The Long Term Fate and Evolution of Astrophysical Objects","venue":"astro-ph","work_id":"62afc3a7-bea8-4d5f-b81c-f636c74ecffe","year":1997},"citing_paper":{"arxiv_id":"1908.01335","last_updated":"2019-08-04T12:50:36Z","snapshot_observed_at":"2026-08-19T01:20:58.863595Z","submitted_at":"2019-08-04T12:50:36Z","title":"Upper limit on the fraction of alien civilizations that develop communication technology","version":1},"reference_index":28,"source":"pdf_text","source_observed_at":"2026-08-14T15:22:41.521785Z"},"links":{"cited_paper":"/paper/astro-ph/9701131","citing_paper":"/paper/1908.01335"},"observation_digest":"sha256:2e2b31a4bc8ec7307da22dbb8b9798ba65384b28e66779efb5ff6d12add2119b","observation_id":"1ccd5305-c20c-42e1-836b-9f5c14caebcf","resolution":{"observed_at":"2026-08-14T15:22:42.199984Z","resolver_source":"local_arxiv","status":"verified_exact"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-22T06:32:14.747728+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-22T06:32:14.747728+00:00","source":"crossref"},{"observed_at":"2026-08-22T06:32:06.552537+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":{"arxiv_id":"1606.08448","last_updated":"2016-07-26T18:03:37Z","snapshot_observed_at":"2026-08-19T01:29:10.205648Z","submitted_at":"2016-06-27T20:00:04Z","title":"Relative Likelihood for Life as a Function of Cosmic Time","version":2},"cited_work":{"arxiv_id":"1606.08448","doi":null,"metadata_source":"pith","pith_arxiv_id":"1606.08448","snapshot_observed_at":"2026-08-14T15:22:42.176414Z","title":"Relative Likelihood for Life as a Function of Cosmic Time","venue":"astro-ph.CO","work_id":"1a53859f-efb1-4246-b2f7-f12cc9b89af9","year":2016},"citing_paper":{"arxiv_id":"1908.01335","last_updated":"2019-08-04T12:50:36Z","snapshot_observed_at":"2026-08-19T01:20:58.863595Z","submitted_at":"2019-08-04T12:50:36Z","title":"Upper limit on the fraction of alien civilizations that develop communication technology","version":1},"reference_index":29,"source":"pdf_text","source_observed_at":"2026-08-14T15:22:41.525783Z"},"links":{"cited_paper":"/paper/1606.08448","citing_paper":"/paper/1908.01335"},"observation_digest":"sha256:6212bb835af27491f2a313ee47e10b7c4ef50ed070c802d88d541fb1147572f1","observation_id":"d2cd189c-515b-4f1c-af8e-446e1366d995","resolution":{"observed_at":"2026-08-14T15:22:42.181710Z","resolver_source":"local_arxiv","status":"malformed_identifier"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-22T06:32:14.747728+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-22T06:32:14.747728+00:00","source":"crossref"},{"observed_at":"2026-08-22T06:32:06.552537+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":null,"snapshot_observed_at":"2026-08-14T15:22:41.529111Z","title":"Fujii, D","venue":null,"work_id":null,"year":2018},"citing_paper":{"arxiv_id":"1908.01335","last_updated":"2019-08-04T12:50:36Z","snapshot_observed_at":"2026-08-19T01:20:58.863595Z","submitted_at":"2019-08-04T12:50:36Z","title":"Upper limit on the fraction of alien civilizations that develop communication technology","version":1},"reference_index":30,"source":"pdf_text","source_observed_at":"2026-08-14T15:22:41.529111Z"},"links":{"citing_paper":"/paper/1908.01335"},"observation_digest":"sha256:b289f1910a81b1c1077c927a12f10104060f0fc903e6fef4c6d0b177370a1847","observation_id":"1b86889e-93f0-45a3-8040-a8d3f4cd3319","resolution":{"observed_at":"2026-08-14T15:22:41.529111Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":{"arxiv_id":"1810.02007","last_updated":"2019-06-14T04:10:00Z","snapshot_observed_at":"2026-08-19T01:29:11.408091Z","submitted_at":"2018-10-03T23:38:36Z","title":"Physical constraints for the evolution of life on exoplanets","version":3},"cited_work":{"arxiv_id":"1810.02007","doi":null,"metadata_source":"pith","pith_arxiv_id":"1810.02007","snapshot_observed_at":"2026-08-14T15:22:42.007235Z","title":"Physical constraints for the evolution of life on exoplanets","venue":"astro-ph.EP","work_id":"c19b4d67-91a2-4107-8603-3f67344ac513","year":2018},"citing_paper":{"arxiv_id":"1908.01335","last_updated":"2019-08-04T12:50:36Z","snapshot_observed_at":"2026-08-19T01:20:58.863595Z","submitted_at":"2019-08-04T12:50:36Z","title":"Upper limit on the fraction of alien civilizations that develop communication technology","version":1},"reference_index":31,"source":"pdf_text","source_observed_at":"2026-08-14T15:22:41.532960Z"},"links":{"cited_paper":"/paper/1810.02007","citing_paper":"/paper/1908.01335"},"observation_digest":"sha256:b790ac0608ce2fc35dd5e13b4e0a28749a6ce3df1a3dca50cf4f6e15c1cb5933","observation_id":"5fa1f7ef-551b-4a11-b4fa-815083f9cb4f","resolution":{"observed_at":"2026-08-14T15:22:42.011472Z","resolver_source":"local_arxiv","status":"malformed_identifier"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-22T06:32:14.747728+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-22T06:32:14.747728+00:00","source":"crossref"},{"observed_at":"2026-08-22T06:32:06.552537+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":{"arxiv_id":"1712.01911","last_updated":"2017-12-05T20:30:00Z","snapshot_observed_at":"2026-08-19T01:29:12.590262Z","submitted_at":"2017-12-05T20:30:00Z","title":"Stellar parameters for TRAPPIST-1","version":1},"cited_work":{"arxiv_id":"1712.01911","doi":null,"metadata_source":"pith","pith_arxiv_id":"1712.01911","snapshot_observed_at":"2026-08-14T15:22:41.990127Z","title":"Stellar parameters for TRAPPIST-1","venue":"astro-ph.SR","work_id":"b5c5fbbf-4676-41ef-985d-9e771e6577f3","year":2017},"citing_paper":{"arxiv_id":"1908.01335","last_updated":"2019-08-04T12:50:36Z","snapshot_observed_at":"2026-08-19T01:20:58.863595Z","submitted_at":"2019-08-04T12:50:36Z","title":"Upper limit on the fraction of alien civilizations that develop communication technology","version":1},"reference_index":32,"source":"pdf_text","source_observed_at":"2026-08-14T15:22:41.536359Z"},"links":{"cited_paper":"/paper/1712.01911","citing_paper":"/paper/1908.01335"},"observation_digest":"sha256:bdcd9284758ed87f0a5605a388e4bb49e24a5fca8f7dcba147badaee7790fa60","observation_id":"db85434f-e362-4c1e-ab11-296c98378e52","resolution":{"observed_at":"2026-08-14T15:22:41.994314Z","resolver_source":"local_arxiv","status":"verified_exact"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-22T06:32:14.747728+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-22T06:32:14.747728+00:00","source":"crossref"},{"observed_at":"2026-08-22T06:32:06.552537+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":{"arxiv_id":"1407.1078","last_updated":"2015-08-21T21:16:18Z","snapshot_observed_at":"2026-08-14T23:27:59.962235Z","submitted_at":"2014-07-03T22:19:45Z","title":"Improved Estimates of the Milky Way's Stellar Mass and Star Formation Rate from Hierarchical Bayesian Meta-Analysis","version":3},"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":"1407.1078","snapshot_observed_at":"2026-08-14T15:22:41.539832Z","title":null,"venue":null,"work_id":null,"year":2015},"citing_paper":{"arxiv_id":"1908.01335","last_updated":"2019-08-04T12:50:36Z","snapshot_observed_at":"2026-08-19T01:20:58.863595Z","submitted_at":"2019-08-04T12:50:36Z","title":"Upper limit on the fraction of alien civilizations that develop communication technology","version":1},"reference_index":33,"source":"pdf_text","source_observed_at":"2026-08-14T15:22:41.539832Z"},"links":{"cited_paper":"/paper/1407.1078","citing_paper":"/paper/1908.01335"},"observation_digest":"sha256:b176d04cf37e5146f323f8ee161a0d5ed258417d0b732124093ff4233f998380","observation_id":"b4e79528-acfa-4502-950d-7bee1cb38db6","resolution":{"observed_at":"2026-08-14T15:22:41.539832Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":{"arxiv_id":"1110.4105","last_updated":"2011-10-18T20:00:00Z","snapshot_observed_at":"2026-08-19T01:28:41.188809Z","submitted_at":"2011-10-18T20:00:00Z","title":"Toward a Unification of Star Formation Rate Determinations in the Milky Way and Other Galaxies","version":1},"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":"1110.4105","snapshot_observed_at":"2026-08-14T15:22:41.543371Z","title":"Chomiuk and M","venue":null,"work_id":null,"year":2011},"citing_paper":{"arxiv_id":"1908.01335","last_updated":"2019-08-04T12:50:36Z","snapshot_observed_at":"2026-08-19T01:20:58.863595Z","submitted_at":"2019-08-04T12:50:36Z","title":"Upper limit on the fraction of alien civilizations that develop communication technology","version":1},"reference_index":34,"source":"pdf_text","source_observed_at":"2026-08-14T15:22:41.543371Z"},"links":{"cited_paper":"/paper/1110.4105","citing_paper":"/paper/1908.01335"},"observation_digest":"sha256:db5a2d788a5ff96ddd62917a1cf63ea00cd4dc60fb1b36d7a552c16983c81fa1","observation_id":"2f2e6079-9424-4bea-b1a0-7fde0ae9d5d7","resolution":{"observed_at":"2026-08-14T15:22:41.543371Z","resolver_source":null,"status":"malformed_identifier"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":{"arxiv_id":"astro-ph/0201098","last_updated":"2002-01-07T21:09:22Z","snapshot_observed_at":"2026-08-13T21:33:39.129826Z","submitted_at":"2002-01-07T21:09:22Z","title":"The Initial Mass Function of Stars: Evidence for Uniformity in Variable Systems","version":1},"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":"astro-ph/0201098","snapshot_observed_at":"2026-08-14T15:22:41.547468Z","title":"Kroupa, The initial mass function of stars: Evidence for uniformity in variable systems, Science 295, 82 (2002) doi:10.1126/science.1067524 [astro-ph/0201098]","venue":null,"work_id":null,"year":2002},"citing_paper":{"arxiv_id":"1908.01335","last_updated":"2019-08-04T12:50:36Z","snapshot_observed_at":"2026-08-19T01:20:58.863595Z","submitted_at":"2019-08-04T12:50:36Z","title":"Upper limit on the fraction of alien civilizations that develop communication technology","version":1},"reference_index":35,"source":"pdf_text","source_observed_at":"2026-08-14T15:22:41.547468Z"},"links":{"cited_paper":"/paper/astro-ph/0201098","citing_paper":"/paper/1908.01335"},"observation_digest":"sha256:df405def8b3d78ae7d91c8db8d54961b6be5bc6900731e892244cc790f06bd11","observation_id":"2a45b6bc-ac22-44af-8290-d8b4ebebe811","resolution":{"observed_at":"2026-08-14T15:22:41.547468Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":{"arxiv_id":"astro-ph/0308356","last_updated":"2003-08-20T20:00:01Z","snapshot_observed_at":"2026-08-20T00:32:10.152465Z","submitted_at":"2003-08-20T20:00:01Z","title":"Galactic-Field IMFs of Massive Stars","version":1},"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":"astro-ph/0308356","snapshot_observed_at":"2026-08-14T15:22:41.551055Z","title":"Kroupa and C","venue":null,"work_id":null,"year":2003},"citing_paper":{"arxiv_id":"1908.01335","last_updated":"2019-08-04T12:50:36Z","snapshot_observed_at":"2026-08-19T01:20:58.863595Z","submitted_at":"2019-08-04T12:50:36Z","title":"Upper limit on the fraction of alien civilizations that develop communication technology","version":1},"reference_index":36,"source":"pdf_text","source_observed_at":"2026-08-14T15:22:41.551055Z"},"links":{"cited_paper":"/paper/astro-ph/0308356","citing_paper":"/paper/1908.01335"},"observation_digest":"sha256:3e7c57225428af15b4fab1d12b84172cbf394bfef9409233a9397032a3621f95","observation_id":"ff1e7bae-4ebb-4122-93a6-283dad9995f7","resolution":{"observed_at":"2026-08-14T15:22:41.551055Z","resolver_source":null,"status":"malformed_identifier"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":{"arxiv_id":"1508.02711","last_updated":"2015-08-11T20:04:49Z","snapshot_observed_at":"2026-08-19T01:29:09.117372Z","submitted_at":"2015-08-11T20:04:49Z","title":"Star Formation in the Local Milky Way","version":1},"cited_work":{"arxiv_id":"1508.02711","doi":null,"metadata_source":"pith","pith_arxiv_id":"1508.02711","snapshot_observed_at":"2026-08-14T15:22:41.927543Z","title":"Star Formation in the Local Milky Way","venue":"astro-ph.GA","work_id":"1791c125-d888-4cb1-977e-7e29489eee5e","year":2015},"citing_paper":{"arxiv_id":"1908.01335","last_updated":"2019-08-04T12:50:36Z","snapshot_observed_at":"2026-08-19T01:20:58.863595Z","submitted_at":"2019-08-04T12:50:36Z","title":"Upper limit on the fraction of alien civilizations that develop communication technology","version":1},"reference_index":37,"source":"pdf_text","source_observed_at":"2026-08-14T15:22:41.555324Z"},"links":{"cited_paper":"/paper/1508.02711","citing_paper":"/paper/1908.01335"},"observation_digest":"sha256:c33e2fa2835ca093bfa4b0395a3de781de8b0b574de76b488ec5cb3f1ef4bb24","observation_id":"9b642b84-e477-40ae-acee-b76d870c7697","resolution":{"observed_at":"2026-08-14T15:22:41.932604Z","resolver_source":"local_arxiv","status":"verified_exact"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-22T06:32:14.747728+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-22T06:32:14.747728+00:00","source":"crossref"},{"observed_at":"2026-08-22T06:32:06.552537+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":{"arxiv_id":"1204.3552","last_updated":"2012-06-22T17:30:39Z","snapshot_observed_at":"2026-08-13T03:05:14.122278Z","submitted_at":"2012-04-16T16:17:07Z","title":"Star Formation in the Milky Way and Nearby Galaxies","version":2},"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":"1204.3552","snapshot_observed_at":"2026-08-14T15:22:41.560006Z","title":null,"venue":null,"work_id":null,"year":2012},"citing_paper":{"arxiv_id":"1908.01335","last_updated":"2019-08-04T12:50:36Z","snapshot_observed_at":"2026-08-19T01:20:58.863595Z","submitted_at":"2019-08-04T12:50:36Z","title":"Upper limit on the fraction of alien civilizations that develop communication technology","version":1},"reference_index":38,"source":"pdf_text","source_observed_at":"2026-08-14T15:22:41.560006Z"},"links":{"cited_paper":"/paper/1204.3552","citing_paper":"/paper/1908.01335"},"observation_digest":"sha256:de66b378c7de3043e92d12167b02628e288d7d0b7684d2faa443720fcab36ad0","observation_id":"6905f183-b771-458a-9817-34986a97840c","resolution":{"observed_at":"2026-08-14T15:22:41.560006Z","resolver_source":null,"status":"malformed_identifier"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":"raw_reference","pith_arxiv_id":null,"snapshot_observed_at":"2026-08-14T15:22:42.549554Z","title":null,"venue":null,"work_id":"6629ec92-c79d-418e-a5b6-59ca17b36045","year":1974},"citing_paper":{"arxiv_id":"1908.01335","last_updated":"2019-08-04T12:50:36Z","snapshot_observed_at":"2026-08-19T01:20:58.863595Z","submitted_at":"2019-08-04T12:50:36Z","title":"Upper limit on the fraction of alien civilizations that develop communication technology","version":1},"reference_index":39,"source":"pdf_text","source_observed_at":"2026-08-14T15:22:41.564786Z"},"links":{"citing_paper":"/paper/1908.01335"},"observation_digest":"sha256:4b5b3d934e8b735eecdfa9cc15da1448d2dff6bfab619fffc7abb162ad420854","observation_id":"d4e610c3-e1c9-4e80-b2ee-852ac6b0226d","resolution":{"observed_at":"2026-08-14T15:22:42.553716Z","resolver_source":"raw_fallback","status":"unresolved"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-22T06:32:14.747728+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-22T06:32:14.747728+00:00","source":"crossref"},{"observed_at":"2026-08-22T06:32:06.552537+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":{"arxiv_id":"astro-ph/9501019","last_updated":"1995-01-08T21:24:02Z","snapshot_observed_at":"2026-08-19T01:29:52.971905Z","submitted_at":"1995-01-08T21:24:02Z","title":"Terrestrial Implications of Cosmological Gamma-Ray Burst Models","version":1},"cited_work":{"arxiv_id":"astro-ph/9501019","doi":null,"metadata_source":"pith","pith_arxiv_id":"astro-ph/9501019","snapshot_observed_at":"2026-08-14T15:22:41.902134Z","title":"Terrestrial Implications of Cosmological Gamma-Ray Burst Models","venue":"astro-ph","work_id":"9677e61f-783d-49c5-b844-e95c59d7cbe9","year":1995},"citing_paper":{"arxiv_id":"1908.01335","last_updated":"2019-08-04T12:50:36Z","snapshot_observed_at":"2026-08-19T01:20:58.863595Z","submitted_at":"2019-08-04T12:50:36Z","title":"Upper limit on the fraction of alien civilizations that develop communication technology","version":1},"reference_index":40,"source":"pdf_text","source_observed_at":"2026-08-14T15:22:41.568650Z"},"links":{"cited_paper":"/paper/astro-ph/9501019","citing_paper":"/paper/1908.01335"},"observation_digest":"sha256:1cdb7d131371d4772056da354a10ca132fee838bcef8305f4c8c1602058e2ec5","observation_id":"fd96599c-51a2-48da-ab56-02bae6fbe5e9","resolution":{"observed_at":"2026-08-14T15:22:41.905992Z","resolver_source":"local_arxiv","status":"verified_exact"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-22T06:32:14.747728+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-22T06:32:14.747728+00:00","source":"crossref"},{"observed_at":"2026-08-22T06:32:06.552537+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":{"arxiv_id":"astro-ph/9705008","last_updated":"1997-05-02T06:47:46Z","snapshot_observed_at":"2026-08-21T02:18:33.065509Z","submitted_at":"1997-05-02T06:47:46Z","title":"Life Extinctions By Cosmic Ray Bursts","version":1},"cited_work":{"arxiv_id":"astro-ph/9705008","doi":null,"metadata_source":"pith","pith_arxiv_id":"astro-ph/9705008","snapshot_observed_at":"2026-08-14T15:22:41.885607Z","title":"Life Extinctions By Cosmic Ray Bursts","venue":"astro-ph","work_id":"552486a8-d915-4e22-8c5d-ff2568d6444c","year":1997},"citing_paper":{"arxiv_id":"1908.01335","last_updated":"2019-08-04T12:50:36Z","snapshot_observed_at":"2026-08-19T01:20:58.863595Z","submitted_at":"2019-08-04T12:50:36Z","title":"Upper limit on the fraction of alien civilizations that develop communication technology","version":1},"reference_index":41,"source":"pdf_text","source_observed_at":"2026-08-14T15:22:41.572896Z"},"links":{"cited_paper":"/paper/astro-ph/9705008","citing_paper":"/paper/1908.01335"},"observation_digest":"sha256:90b23d9f3ce570a2a21bc70084fc26a8723084ec4b16202d6224e5e21b8d89e9","observation_id":"cd9a6f09-eae4-49d4-a741-d3b2d89c7980","resolution":{"observed_at":"2026-08-14T15:22:41.889636Z","resolver_source":"local_arxiv","status":"verified_exact"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-22T06:32:14.747728+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-22T06:32:14.747728+00:00","source":"crossref"},{"observed_at":"2026-08-22T06:32:06.552537+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":{"arxiv_id":"astro-ph/0411284","last_updated":"2005-02-10T23:53:33Z","snapshot_observed_at":"2026-08-19T01:29:50.233468Z","submitted_at":"2004-11-10T21:00:15Z","title":"Terrestrial Ozone Depletion Due to a Milky Way Gamma-Ray Burst","version":2},"cited_work":{"arxiv_id":"astro-ph/0411284","doi":null,"metadata_source":"pith","pith_arxiv_id":"astro-ph/0411284","snapshot_observed_at":"2026-08-14T15:22:41.869905Z","title":"Terrestrial Ozone Depletion Due to a Milky Way Gamma-Ray Burst","venue":"astro-ph","work_id":"0f8aae22-5d46-4d58-a4e6-387e072019c9","year":2004},"citing_paper":{"arxiv_id":"1908.01335","last_updated":"2019-08-04T12:50:36Z","snapshot_observed_at":"2026-08-19T01:20:58.863595Z","submitted_at":"2019-08-04T12:50:36Z","title":"Upper limit on the fraction of alien civilizations that develop communication technology","version":1},"reference_index":42,"source":"pdf_text","source_observed_at":"2026-08-14T15:22:41.577237Z"},"links":{"cited_paper":"/paper/astro-ph/0411284","citing_paper":"/paper/1908.01335"},"observation_digest":"sha256:6ea33978f7f555d2ef0ba4a71797d8fc4fc2bfeb2f07f4b5aa33a0916c46780d","observation_id":"c077c3bf-835f-4ea0-aaf9-1ff5d7f94579","resolution":{"observed_at":"2026-08-14T15:22:41.874265Z","resolver_source":"local_arxiv","status":"verified_exact"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-22T06:32:14.747728+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-22T06:32:14.747728+00:00","source":"crossref"},{"observed_at":"2026-08-22T06:32:06.552537+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":{"arxiv_id":"astro-ph/0505472","last_updated":"2005-08-04T19:24:02Z","snapshot_observed_at":"2026-07-07T00:50:48.284065Z","submitted_at":"2005-05-23T13:14:53Z","title":"Gamma-Ray Bursts and the Earth: Exploration of Atmospheric, Biological, Climatic and Biogeochemical Effects","version":2},"cited_work":{"arxiv_id":"astro-ph/0505472","doi":null,"metadata_source":"pith","pith_arxiv_id":"astro-ph/0505472","snapshot_observed_at":"2026-08-14T15:22:41.853686Z","title":"Gamma-Ray Bursts and the Earth: Exploration of Atmospheric, Biological, Climatic and Biogeochemical Effects","venue":"astro-ph","work_id":"067704db-ea47-4a90-b7c9-31f0f9d7083f","year":2005},"citing_paper":{"arxiv_id":"1908.01335","last_updated":"2019-08-04T12:50:36Z","snapshot_observed_at":"2026-08-19T01:20:58.863595Z","submitted_at":"2019-08-04T12:50:36Z","title":"Upper limit on the fraction of alien civilizations that develop communication technology","version":1},"reference_index":43,"source":"pdf_text","source_observed_at":"2026-08-14T15:22:41.581402Z"},"links":{"cited_paper":"/paper/astro-ph/0505472","citing_paper":"/paper/1908.01335"},"observation_digest":"sha256:2bdf2f5bc21d25a91b78b0fe3c2c9e79a7a9a7b6ce550ead3d440cccb9e5fb54","observation_id":"c12c1316-af8c-406d-9bb4-e51809fb86e7","resolution":{"observed_at":"2026-08-14T15:22:41.858070Z","resolver_source":"local_arxiv","status":"verified_exact"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-22T06:32:14.747728+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-22T06:32:14.747728+00:00","source":"crossref"},{"observed_at":"2026-08-22T06:32:06.552537+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":{"arxiv_id":"astro-ph/0309415","last_updated":"2004-04-23T19:25:37Z","snapshot_observed_at":"2026-08-19T01:29:51.007078Z","submitted_at":"2003-09-15T20:42:47Z","title":"Did a gamma-ray burst initiate the late Ordovician mass extinction?","version":3},"cited_work":{"arxiv_id":"astro-ph/0309415","doi":null,"metadata_source":"pith","pith_arxiv_id":"astro-ph/0309415","snapshot_observed_at":"2026-08-14T15:22:41.839915Z","title":"Did a gamma-ray burst initiate the late Ordovician mass extinction?","venue":"astro-ph","work_id":"58c70db8-4387-4d58-b60b-a938999531aa","year":2003},"citing_paper":{"arxiv_id":"1908.01335","last_updated":"2019-08-04T12:50:36Z","snapshot_observed_at":"2026-08-19T01:20:58.863595Z","submitted_at":"2019-08-04T12:50:36Z","title":"Upper limit on the fraction of alien civilizations that develop communication technology","version":1},"reference_index":44,"source":"pdf_text","source_observed_at":"2026-08-14T15:22:41.585649Z"},"links":{"cited_paper":"/paper/astro-ph/0309415","citing_paper":"/paper/1908.01335"},"observation_digest":"sha256:4edc27305f55a408e8407d6202b56f307fe6131d8fd27deb9c30613de5542473","observation_id":"d59422ba-1fe7-4f5c-99a8-2751d6970f86","resolution":{"observed_at":"2026-08-14T15:22:41.843705Z","resolver_source":"local_arxiv","status":"verified_exact"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-22T06:32:14.747728+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-22T06:32:14.747728+00:00","source":"crossref"},{"observed_at":"2026-08-22T06:32:06.552537+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":{"arxiv_id":"1409.2506","last_updated":"2014-11-13T17:20:40Z","snapshot_observed_at":"2026-08-19T01:28:39.099440Z","submitted_at":"2014-09-08T20:09:41Z","title":"On the role of GRBs on life extinction in the Universe","version":2},"cited_work":{"arxiv_id":"1409.2506","doi":null,"metadata_source":"pith","pith_arxiv_id":"1409.2506","snapshot_observed_at":"2026-08-14T15:22:41.824374Z","title":"On the role of GRBs on life extinction in the Universe","venue":"astro-ph.HE","work_id":"b199eeec-6a47-481f-81f1-d122702bfb87","year":2014},"citing_paper":{"arxiv_id":"1908.01335","last_updated":"2019-08-04T12:50:36Z","snapshot_observed_at":"2026-08-19T01:20:58.863595Z","submitted_at":"2019-08-04T12:50:36Z","title":"Upper limit on the fraction of alien civilizations that develop communication technology","version":1},"reference_index":45,"source":"pdf_text","source_observed_at":"2026-08-14T15:22:41.589586Z"},"links":{"cited_paper":"/paper/1409.2506","citing_paper":"/paper/1908.01335"},"observation_digest":"sha256:d70fed4bbd427bdca778bdb014f14b6ad0c2d8d7f0f7f3607396bc36c3b0b190","observation_id":"ad16f526-a64b-48b3-a4a2-a4502c8c4abd","resolution":{"observed_at":"2026-08-14T15:22:41.828273Z","resolver_source":"local_arxiv","status":"malformed_identifier"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-22T06:32:14.747728+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-22T06:32:14.747728+00:00","source":"crossref"},{"observed_at":"2026-08-22T06:32:06.552537+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":null,"snapshot_observed_at":"2026-08-14T15:22:41.594071Z","title":null,"venue":null,"work_id":null,"year":1996},"citing_paper":{"arxiv_id":"1908.01335","last_updated":"2019-08-04T12:50:36Z","snapshot_observed_at":"2026-08-19T01:20:58.863595Z","submitted_at":"2019-08-04T12:50:36Z","title":"Upper limit on the fraction of alien civilizations that develop communication technology","version":1},"reference_index":46,"source":"pdf_text","source_observed_at":"2026-08-14T15:22:41.594071Z"},"links":{"citing_paper":"/paper/1908.01335"},"observation_digest":"sha256:48f8211c9b05e0b925c9e01a8f338d7855169f0716ea70355a28806618c79f0e","observation_id":"bacbb029-718b-4dda-bd68-34a607a638e0","resolution":{"observed_at":"2026-08-14T15:22:41.594071Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":null,"snapshot_observed_at":"2026-08-14T15:22:41.597671Z","title":null,"venue":null,"work_id":null,"year":2017},"citing_paper":{"arxiv_id":"1908.01335","last_updated":"2019-08-04T12:50:36Z","snapshot_observed_at":"2026-08-19T01:20:58.863595Z","submitted_at":"2019-08-04T12:50:36Z","title":"Upper limit on the fraction of alien civilizations that develop communication technology","version":1},"reference_index":47,"source":"pdf_text","source_observed_at":"2026-08-14T15:22:41.597671Z"},"links":{"citing_paper":"/paper/1908.01335"},"observation_digest":"sha256:8279b14df661f70d8605ddf19c74020a1132dac9cef06dd8e048c252ab6e3405","observation_id":"a6f1c237-bea4-45ee-b19d-ad32206c6988","resolution":{"observed_at":"2026-08-14T15:22:41.597671Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":{"arxiv_id":"0805.2429","last_updated":"2008-11-18T08:02:31Z","snapshot_observed_at":"2026-08-15T10:15:17.715287Z","submitted_at":"2008-05-16T01:32:47Z","title":"Galactic Neutrino Communication","version":3},"cited_work":{"arxiv_id":"0805.2429","doi":null,"metadata_source":"pith","pith_arxiv_id":"0805.2429","snapshot_observed_at":"2026-08-14T15:22:41.805778Z","title":"Galactic Neutrino Communication","venue":"physics.pop-ph","work_id":"dd6eb712-47c5-45bb-b995-dfb6dfed8a46","year":2008},"citing_paper":{"arxiv_id":"1908.01335","last_updated":"2019-08-04T12:50:36Z","snapshot_observed_at":"2026-08-19T01:20:58.863595Z","submitted_at":"2019-08-04T12:50:36Z","title":"Upper limit on the fraction of alien civilizations that develop communication technology","version":1},"reference_index":48,"source":"pdf_text","source_observed_at":"2026-08-14T15:22:41.601072Z"},"links":{"cited_paper":"/paper/0805.2429","citing_paper":"/paper/1908.01335"},"observation_digest":"sha256:57172084bd64c51dc00a6ca3c6018f622e42972d4cebf16f7f2ca7b7215db5af","observation_id":"ddbc5bd5-b44a-4b9a-b41a-dda5af431865","resolution":{"observed_at":"2026-08-14T15:22:41.809800Z","resolver_source":"local_arxiv","status":"verified_exact"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-22T06:32:14.747728+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-22T06:32:14.747728+00:00","source":"crossref"},{"observed_at":"2026-08-22T06:32:06.552537+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":{"arxiv_id":"physics/9711021","last_updated":"1999-12-16T00:26:14Z","snapshot_observed_at":"2026-08-05T14:53:33.365109Z","submitted_at":"1997-11-22T02:18:05Z","title":"A Unified Approach to the Classical Statistical Analysis of Small Signals","version":2},"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":"physics/9711021","snapshot_observed_at":"2026-08-14T15:22:41.605335Z","title":null,"venue":null,"work_id":null,"year":1998},"citing_paper":{"arxiv_id":"1908.01335","last_updated":"2019-08-04T12:50:36Z","snapshot_observed_at":"2026-08-19T01:20:58.863595Z","submitted_at":"2019-08-04T12:50:36Z","title":"Upper limit on the fraction of alien civilizations that develop communication technology","version":1},"reference_index":49,"source":"pdf_text","source_observed_at":"2026-08-14T15:22:41.605335Z"},"links":{"cited_paper":"/paper/physics/9711021","citing_paper":"/paper/1908.01335"},"observation_digest":"sha256:328859f1ff84d334c222ab1baf38fb52d4eb9dc0b6a501f0b47025dee53a10bf","observation_id":"b842f634-c0a5-413a-b3cf-13dbbe44cd49","resolution":{"observed_at":"2026-08-14T15:22:41.605335Z","resolver_source":null,"status":"malformed_identifier"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":{"arxiv_id":"1701.06227","last_updated":"2017-01-22T22:33:50Z","snapshot_observed_at":"2026-08-19T01:29:05.427616Z","submitted_at":"2017-01-22T22:33:50Z","title":"The Breakthrough Listen Search for Intelligent Life: Target Selection of Nearby Stars and Galaxies","version":1},"cited_work":{"arxiv_id":"1701.06227","doi":null,"metadata_source":"pith","pith_arxiv_id":"1701.06227","snapshot_observed_at":"2026-08-14T15:22:41.778691Z","title":"The Breakthrough Listen Search for Intelligent Life: Target Selection of Nearby Stars and Galaxies","venue":"astro-ph.IM","work_id":"fcbf48ee-c9e8-4ceb-a9a3-b108fa96ee60","year":2017},"citing_paper":{"arxiv_id":"1908.01335","last_updated":"2019-08-04T12:50:36Z","snapshot_observed_at":"2026-08-19T01:20:58.863595Z","submitted_at":"2019-08-04T12:50:36Z","title":"Upper limit on the fraction of alien civilizations that develop communication technology","version":1},"reference_index":50,"source":"pdf_text","source_observed_at":"2026-08-14T15:22:41.609111Z"},"links":{"cited_paper":"/paper/1701.06227","citing_paper":"/paper/1908.01335"},"observation_digest":"sha256:6e40cfced301dc25e0ee8c0fe4efe48a0b746e538e4f71b1637a3c3b6d949d2b","observation_id":"7034390f-0bae-477b-a7b2-9752d242d96d","resolution":{"observed_at":"2026-08-14T15:22:41.782980Z","resolver_source":"local_arxiv","status":"verified_exact"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-22T06:32:14.747728+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-22T06:32:14.747728+00:00","source":"crossref"},{"observed_at":"2026-08-22T06:32:06.552537+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":{"arxiv_id":"1812.10161","last_updated":"2018-12-25T19:39:04Z","snapshot_observed_at":"2026-08-19T01:29:05.878945Z","submitted_at":"2018-12-25T19:39:04Z","title":"The Breakthrough Listen Search for Intelligent Life: Searching Boyajian's Star for Laser Line Emission","version":1},"cited_work":{"arxiv_id":"1812.10161","doi":null,"metadata_source":"pith","pith_arxiv_id":"1812.10161","snapshot_observed_at":"2026-08-14T15:22:41.759599Z","title":"The Breakthrough Listen Search for Intelligent Life: Searching Boyajian's Star for Laser Line Emission","venue":"astro-ph.IM","work_id":"ed9dac1d-e476-435a-aad7-1c808bd89d41","year":2018},"citing_paper":{"arxiv_id":"1908.01335","last_updated":"2019-08-04T12:50:36Z","snapshot_observed_at":"2026-08-19T01:20:58.863595Z","submitted_at":"2019-08-04T12:50:36Z","title":"Upper limit on the fraction of alien civilizations that develop communication technology","version":1},"reference_index":51,"source":"pdf_text","source_observed_at":"2026-08-14T15:22:41.613708Z"},"links":{"cited_paper":"/paper/1812.10161","citing_paper":"/paper/1908.01335"},"observation_digest":"sha256:0beb8ec00e1cc7cf90975a50597f9a334f6d8ba1ff2ea98d52cbe276bfbedf62","observation_id":"2464e069-5c71-4368-8e55-2dd992400d59","resolution":{"observed_at":"2026-08-14T15:22:41.765373Z","resolver_source":"local_arxiv","status":"verified_exact"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-22T06:32:14.747728+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-22T06:32:14.747728+00:00","source":"crossref"},{"observed_at":"2026-08-22T06:32:06.552537+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":{"arxiv_id":"1907.05519","last_updated":"2019-08-02T18:48:30Z","snapshot_observed_at":"2026-08-19T01:29:11.777092Z","submitted_at":"2019-07-11T23:13:21Z","title":"The Breakthrough Listen Search for Extraterrestrial Intelligence","version":2},"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":"1907.05519","snapshot_observed_at":"2026-08-14T15:22:41.618676Z","title":"Gajjaret al., The breakthrough listen search for extrater- restrial intelligence, arXiv:1907.05519 [astro-ph.IM]","venue":null,"work_id":null,"year":1907},"citing_paper":{"arxiv_id":"1908.01335","last_updated":"2019-08-04T12:50:36Z","snapshot_observed_at":"2026-08-19T01:20:58.863595Z","submitted_at":"2019-08-04T12:50:36Z","title":"Upper limit on the fraction of alien civilizations that develop communication technology","version":1},"reference_index":52,"source":"pdf_text","source_observed_at":"2026-08-14T15:22:41.618676Z"},"links":{"cited_paper":"/paper/1907.05519","citing_paper":"/paper/1908.01335"},"observation_digest":"sha256:33ffe965cbc704be6e770f3c29a5239107e0d1b592d494b97ae6154f514e769c","observation_id":"27fd1ffb-e660-4bc8-808c-94c1bbf6f3a0","resolution":{"observed_at":"2026-08-14T15:22:41.618676Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":{"arxiv_id":"1907.05427","last_updated":"2019-07-11T18:00:03Z","snapshot_observed_at":"2026-08-19T12:51:19.611012Z","submitted_at":"2019-07-11T18:00:03Z","title":"Searching the Moon for Extrasolar Material and the Building Blocks of Extraterrestrial Life","version":1},"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":"1907.05427","snapshot_observed_at":"2026-08-14T15:22:41.622758Z","title":"Lingam and A","venue":null,"work_id":null,"year":1907},"citing_paper":{"arxiv_id":"1908.01335","last_updated":"2019-08-04T12:50:36Z","snapshot_observed_at":"2026-08-19T01:20:58.863595Z","submitted_at":"2019-08-04T12:50:36Z","title":"Upper limit on the fraction of alien civilizations that develop communication technology","version":1},"reference_index":53,"source":"pdf_text","source_observed_at":"2026-08-14T15:22:41.622758Z"},"links":{"cited_paper":"/paper/1907.05427","citing_paper":"/paper/1908.01335"},"observation_digest":"sha256:22d73ab83b7924062fbc41abe5103c0dc53581915578c04a3af020e86659f130","observation_id":"79f228d6-4004-434b-b9e2-1a05bed05e33","resolution":{"observed_at":"2026-08-14T15:22:41.622758Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}}],"paper":{"arxiv_id":"1908.01335","last_updated":"2019-08-04T12:50:36Z","latest_version":1,"primary_category":"physics.pop-ph","snapshot_observed_at":"2026-08-19T01:20:58.863595Z","submitted_at":"2019-08-04T12:50:36Z","title":"Upper limit on the fraction of alien civilizations that develop communication technology"},"reference_resolution":{"displayed":53,"state_counts":{"malformed_identifier":9,"metadata_mismatch":1,"parse_uncertain":0,"unresolved":21,"verified_exact":20,"verified_fuzzy":2},"total_outbound_references":53},"refusal":"A citation records a reference. It does not transfer a finding from one paper to another.","schema":"pith.paper-citation-record.v1","standing_sources":[{"observed_at":"2026-08-22T06:32:14.747728+00:00","source":"crossref"},{"observed_at":"2026-08-22T06:32:06.552537+00:00","source":"retraction_watch"}],"thesis":"As of 22 August 2026, this Paper Citation Record lists 53 of 53 outbound references and 0 inbound Pith citation observations for arXiv:1908.01335."}