{"as_of":"2026-08-19T12:54:00Z","caps":{"database_statements":6,"inbound":100,"outbound":100},"context_digest":"sha256:18b1a1023ae8f31999f89ceed2e90b1b3d5cb3b5d8c703c7823f6fd59403f3e0","coverage":[{"denominator":0,"lane":"reference_resolution","note":"Typed states for the displayed outbound observations.","records_observed":0,"source":"paper_references, paper_reference_links","source_observed_at":null,"state":"measured"},{"denominator":7,"lane":"standing_notices","note":"One-hop event checks from named stored sources.","records_observed":7,"source":"scholarly_work_events, retraction_status_cache","source_observed_at":"2026-08-19T06:32:44.657259+00:00","state":"measured"},{"denominator":7,"lane":"inbound_itemization","note":"Pith citing papers itemized under the disclosed page cap.","records_observed":7,"source":"paper_references, paper_reference_links","source_observed_at":"2026-08-15T19:57:37.343330Z","state":"measured"},{"denominator":1,"lane":"external_citation_measurements","note":"A source-named dated measurement, never combined with another source.","records_observed":0,"source":"arxiv_reference","source_observed_at":"2026-05-16T12:02:50.969537Z","state":"measured"}],"external_citation_measurements":[],"inbound":[{"citation":{"cited_paper":{"arxiv_id":"2102.07034","last_updated":"2021-04-26T18:05:12Z","snapshot_observed_at":"2026-08-16T18:45:45.302922Z","submitted_at":"2021-02-13T23:56:55Z","title":"Can different black holes cast the same shadow?","version":2},"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":"2102.07034","snapshot_observed_at":"2026-08-12T21:39:35.719022Z","title":null,"venue":null,"work_id":null,"year":2021},"citing_paper":{"arxiv_id":"2411.08486","last_updated":"2025-06-16T11:03:56Z","snapshot_observed_at":"2026-08-16T09:42:26.320933Z","submitted_at":"2024-11-13T10:07:28Z","title":"Determining parameters of Kerr-Newman black holes by shadow observation from finite distance and spatial infinity","version":2},"reference_index":32,"source":"pdf_text","source_observed_at":"2026-08-12T21:39:35.719022Z"},"links":{"cited_paper":"/paper/2102.07034","citing_paper":"/paper/2411.08486"},"observation_digest":"sha256:fd90cb29d20b087231e32138164584a1102fae90ecbc1ee054efed131b5ce1ed","observation_id":"38d36dd3-e647-44c3-89aa-e54e918c2772","resolution":{"observed_at":"2026-08-12T21:39:35.719022Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":{"arxiv_id":"2102.07034","last_updated":"2021-04-26T18:05:12Z","snapshot_observed_at":"2026-08-16T18:45:45.302922Z","submitted_at":"2021-02-13T23:56:55Z","title":"Can different black holes cast the same shadow?","version":2},"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":"2102.07034","snapshot_observed_at":"2026-08-09T18:51:41.399727Z","title":"Can diﬀerent black holes cast the same shadow?","venue":null,"work_id":null,"year":2021},"citing_paper":{"arxiv_id":"2502.00502","last_updated":"2025-02-10T14:04:04Z","snapshot_observed_at":"2026-08-18T12:37:45.960132Z","submitted_at":"2025-02-01T17:49:07Z","title":"Spherically symmetric and static black bounces with multiple horizons, throats, and anti-throats in four dimensions","version":2},"reference_index":21,"source":"pdf_text","source_observed_at":"2026-08-09T18:51:41.399727Z"},"links":{"cited_paper":"/paper/2102.07034","citing_paper":"/paper/2502.00502"},"observation_digest":"sha256:f21c1167012e18317542ef8b79bb261a93202fb1935a2f7c46c0fb2fcbf9a163","observation_id":"18e857dd-af1d-4cd6-a898-266a033bd5a9","resolution":{"observed_at":"2026-08-09T18:51:41.399727Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":{"arxiv_id":"2102.07034","last_updated":"2021-04-26T18:05:12Z","snapshot_observed_at":"2026-08-16T18:45:45.302922Z","submitted_at":"2021-02-13T23:56:55Z","title":"Can different black holes cast the same shadow?","version":2},"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":"2102.07034","snapshot_observed_at":"2026-08-09T14:38:40.817201Z","title":null,"venue":null,"work_id":null,"year":2021},"citing_paper":{"arxiv_id":"2502.01759","last_updated":"2025-02-03T19:02:21Z","snapshot_observed_at":"2026-08-13T19:39:46.202024Z","submitted_at":"2025-02-03T19:02:21Z","title":"Spinning generalizations of Majumdar-Papapetrou multi-black hole spacetimes: light rings, lensing and shadows","version":1},"reference_index":42,"source":"pdf_text","source_observed_at":"2026-08-09T14:38:40.817201Z"},"links":{"cited_paper":"/paper/2102.07034","citing_paper":"/paper/2502.01759"},"observation_digest":"sha256:2796561a24b7e1f6e6e490e9482801f51e28b72f290e9a90340c419cdcf05136","observation_id":"ba521c38-63f2-4927-8164-73d80681cbb8","resolution":{"observed_at":"2026-08-09T14:38:40.817201Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":{"arxiv_id":"2102.07034","last_updated":"2021-04-26T18:05:12Z","snapshot_observed_at":"2026-08-16T18:45:45.302922Z","submitted_at":"2021-02-13T23:56:55Z","title":"Can different black holes cast the same shadow?","version":2},"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":"2102.07034","snapshot_observed_at":"2026-08-15T19:57:37.343330Z","title":"Can diﬀerent black holes cast the same shadow?","venue":null,"work_id":null,"year":2021},"citing_paper":{"arxiv_id":"2506.14872","last_updated":"2025-08-20T22:38:31Z","snapshot_observed_at":"2026-08-19T01:37:54.820447Z","submitted_at":"2025-06-17T18:00:00Z","title":"Exact plane symmetric black bounce with a perfect-fluid exterior obeying a linear equation of state","version":2},"reference_index":52,"source":"pdf_text","source_observed_at":"2026-08-15T19:57:37.343330Z"},"links":{"cited_paper":"/paper/2102.07034","citing_paper":"/paper/2506.14872"},"observation_digest":"sha256:0ecfb8e9367111601d8af52cb98d3c805be06d53d6da3467b2b8df6703e51215","observation_id":"c1928899-f105-432f-8fef-1c39c9b4e677","resolution":{"observed_at":"2026-08-15T19:57:37.343330Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":{"arxiv_id":"2102.07034","last_updated":"2021-04-26T18:05:12Z","snapshot_observed_at":"2026-08-16T18:45:45.302922Z","submitted_at":"2021-02-13T23:56:55Z","title":"Can different black holes cast the same shadow?","version":2},"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":"2102.07034","snapshot_observed_at":"2026-08-05T15:39:28.432298Z","title":null,"venue":null,"work_id":null,"year":2021},"citing_paper":{"arxiv_id":"2508.19823","last_updated":"2025-09-14T01:22:39Z","snapshot_observed_at":"2026-08-09T06:53:04.635058Z","submitted_at":"2025-08-27T12:14:20Z","title":"The existence and upper bound for stable photon spheres in static spherically symmetric black holes","version":2},"reference_index":13,"source":"pdf_text","source_observed_at":"2026-08-05T15:39:28.432298Z"},"links":{"cited_paper":"/paper/2102.07034","citing_paper":"/paper/2508.19823"},"observation_digest":"sha256:e508ec57a9cd62d6a53da91f6727f774ef6b704180ccda22750638d069acbe54","observation_id":"8e5c441d-9890-43f7-9129-52db5a81cbf1","resolution":{"observed_at":"2026-08-05T15:39:28.432298Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":{"arxiv_id":"2102.07034","last_updated":"2021-04-26T18:05:12Z","snapshot_observed_at":"2026-08-16T18:45:45.302922Z","submitted_at":"2021-02-13T23:56:55Z","title":"Can different black holes cast the same shadow?","version":2},"cited_work":{"arxiv_id":"2102.07034","doi":null,"metadata_source":"arxiv_reference","pith_arxiv_id":"2102.07034","snapshot_observed_at":"2026-06-05T21:23:00.469572Z","title":"Can different black holes cast the same shadow?","venue":null,"work_id":"4661c56e-9813-490b-bc2b-237415e83c17","year":2021},"citing_paper":{"arxiv_id":"2601.16082","last_updated":"2026-05-05T14:49:12Z","snapshot_observed_at":"2026-07-06T22:42:43.581560Z","submitted_at":"2026-01-22T16:25:13Z","title":"Roche limit and stellar disruption in the Simpson--Visser spacetime","version":2},"reference_index":13,"source":"pdf_text","source_observed_at":"2026-05-16T12:01:27.699618Z"},"links":{"cited_paper":"/paper/2102.07034","citing_paper":"/paper/2601.16082"},"observation_digest":"sha256:deaaccee8d49461faf4766607741ec9394fed82193af58e685aa60dfbc7bd459","observation_id":"41185a92-b3c8-42a8-bdd5-2c1aecc060f7","resolution":{"observed_at":"2026-05-16T12:02:50.972457Z","resolver_source":"arxiv_id","status":"verified_exact"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-19T06:32:44.657259+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-19T06:32:44.657259+00:00","source":"crossref"},{"observed_at":"2026-08-19T06:32:39.956319+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":{"arxiv_id":"2102.07034","last_updated":"2021-04-26T18:05:12Z","snapshot_observed_at":"2026-08-16T18:45:45.302922Z","submitted_at":"2021-02-13T23:56:55Z","title":"Can different black holes cast the same shadow?","version":2},"cited_work":{"arxiv_id":"2102.07034","doi":null,"metadata_source":"arxiv_reference","pith_arxiv_id":"2102.07034","snapshot_observed_at":"2026-06-05T21:23:00.469572Z","title":"Can different black holes cast the same shadow?","venue":null,"work_id":"4661c56e-9813-490b-bc2b-237415e83c17","year":2021},"citing_paper":{"arxiv_id":"2604.05604","last_updated":"2026-04-07T08:56:15Z","snapshot_observed_at":"2026-08-11T04:12:28.275670Z","submitted_at":"2026-04-07T08:56:15Z","title":"Twisted doughnuts: Thick disk torus around equatorial asymmetric black hole","version":1},"reference_index":26,"source":"pdf_text","source_observed_at":"2026-05-10T20:18:26.411263Z"},"links":{"cited_paper":"/paper/2102.07034","citing_paper":"/paper/2604.05604"},"observation_digest":"sha256:fa6617be484174537d063bddb729347584204ac0b3a2c5fda90d2eb79f735af1","observation_id":"aa978205-d780-4fb6-9f01-96785f28e153","resolution":{"observed_at":"2026-05-10T22:00:50.493098Z","resolver_source":"arxiv_id","status":"verified_exact"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-19T06:32:44.657259+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-19T06:32:44.657259+00:00","source":"crossref"},{"observed_at":"2026-08-19T06:32:39.956319+00:00","source":"retraction_watch"}],"state":"measured"}}],"links":{"evidence":"/evidence","html":"/paper/2102.07034/citation-record","integrity":"/paper/2102.07034/integrity","json":"/paper/2102.07034/citation-record.json","paper":"/paper/2102.07034"},"outbound":[],"paper":{"arxiv_id":"2102.07034","last_updated":"2021-04-26T18:05:12Z","latest_version":2,"primary_category":"gr-qc","snapshot_observed_at":"2026-08-16T18:45:45.302922Z","submitted_at":"2021-02-13T23:56:55Z","title":"Can different black holes cast the same shadow?"},"reference_resolution":{"displayed":0,"state_counts":{"malformed_identifier":0,"metadata_mismatch":0,"parse_uncertain":0,"unresolved":0,"verified_exact":0,"verified_fuzzy":0},"total_outbound_references":0},"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":"2026-08-19T06:32:44.657259+00:00","source":"crossref"},{"observed_at":"2026-08-19T06:32:39.956319+00:00","source":"retraction_watch"}],"thesis":"As of 19 August 2026, this Paper Citation Record lists 0 of 0 outbound references and 7 inbound Pith citation observations for arXiv:2102.07034."}