{"as_of":"2026-08-13T21:15:00Z","caps":{"database_statements":6,"inbound":100,"outbound":100},"context_digest":"sha256:7313809660906e1c769ae44a3acb763f94223fe8a9b9b543674287cd26713f58","coverage":[{"denominator":51,"lane":"reference_resolution","note":"Typed states for the displayed outbound observations.","records_observed":51,"source":"paper_references, paper_reference_links","source_observed_at":"2026-08-10T14:32:51.794471Z","state":"measured"},{"denominator":51,"lane":"standing_notices","note":"One-hop event checks from named stored sources.","records_observed":51,"source":"scholarly_work_events, retraction_status_cache","source_observed_at":"2026-08-13T06:32:02.005865+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/2501.15254/citation-record","integrity":"/paper/2501.15254/integrity","json":"/paper/2501.15254/citation-record.json","paper":"/paper/2501.15254"},"outbound":[{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":"raw_reference","pith_arxiv_id":null,"snapshot_observed_at":"2026-08-10T14:32:52.782030Z","title":"2020, ApJL, 890, L29","venue":null,"work_id":"78fe003d-eb7d-409f-bce2-b190149ab415","year":2020},"citing_paper":{"arxiv_id":"2501.15254","last_updated":"2025-05-15T04:15:10Z","snapshot_observed_at":"2026-08-10T14:25:48.756016Z","submitted_at":"2025-01-25T15:58:49Z","title":"Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning","version":2},"reference_index":1,"source":"pdf_text","source_observed_at":"2026-08-10T14:32:51.522358Z"},"links":{"citing_paper":"/paper/2501.15254"},"observation_digest":"sha256:11275114b15ca2af280a3f90de6795b54f501cf79dc63cf497f567f5ccb08b78","observation_id":"5d347867-adeb-440c-8ae2-00dd91270803","resolution":{"observed_at":"2026-08-10T14:32:52.788480Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-13T06:32:02.005865+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-13T06:32:02.005865+00:00","source":"crossref"},{"observed_at":"2026-08-13T06:31:53.387327+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":"2026-08-10T14:32:52.764697Z","title":"2015, SCPMA, 58, 5607","venue":null,"work_id":"8e3661bb-75e1-439a-8454-8293cb2fe061","year":2015},"citing_paper":{"arxiv_id":"2501.15254","last_updated":"2025-05-15T04:15:10Z","snapshot_observed_at":"2026-08-10T14:25:48.756016Z","submitted_at":"2025-01-25T15:58:49Z","title":"Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning","version":2},"reference_index":2,"source":"pdf_text","source_observed_at":"2026-08-10T14:32:51.529549Z"},"links":{"citing_paper":"/paper/2501.15254"},"observation_digest":"sha256:4859734709539fdd17597f39469a35331ebca14e3674a9e85b017f2861b62615","observation_id":"75458f71-d405-41df-8ed5-410038168dc5","resolution":{"observed_at":"2026-08-10T14:32:52.769592Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-13T06:32:02.005865+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-13T06:32:02.005865+00:00","source":"crossref"},{"observed_at":"2026-08-13T06:31:53.387327+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":"2026-08-10T14:32:52.747434Z","title":"2021, A&A, 647, A6","venue":null,"work_id":"b4f4d6c2-6bac-49f6-9ffd-a8a57b1f468b","year":2021},"citing_paper":{"arxiv_id":"2501.15254","last_updated":"2025-05-15T04:15:10Z","snapshot_observed_at":"2026-08-10T14:25:48.756016Z","submitted_at":"2025-01-25T15:58:49Z","title":"Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning","version":2},"reference_index":3,"source":"pdf_text","source_observed_at":"2026-08-10T14:32:51.536061Z"},"links":{"citing_paper":"/paper/2501.15254"},"observation_digest":"sha256:c9923654f55e7a7c376ff01452d6f52c6e61d0945236b0eac53aaa2af8206ca1","observation_id":"8e1504e7-0b9f-416d-8fe4-4f4ffdf2d84b","resolution":{"observed_at":"2026-08-10T14:32:52.753021Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-13T06:32:02.005865+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-13T06:32:02.005865+00:00","source":"crossref"},{"observed_at":"2026-08-13T06:31:53.387327+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":"2026-08-10T14:32:52.729154Z","title":"2001, Mach","venue":null,"work_id":"f90f54a3-f650-403a-a6a9-c291c27051a6","year":2001},"citing_paper":{"arxiv_id":"2501.15254","last_updated":"2025-05-15T04:15:10Z","snapshot_observed_at":"2026-08-10T14:25:48.756016Z","submitted_at":"2025-01-25T15:58:49Z","title":"Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning","version":2},"reference_index":4,"source":"pdf_text","source_observed_at":"2026-08-10T14:32:51.542990Z"},"links":{"citing_paper":"/paper/2501.15254"},"observation_digest":"sha256:18a1a5b9912d188866c1ee7395b2d0b43348dffa8e02aa6f8c3c0ae0277cf08d","observation_id":"edda2173-01d1-4260-92cf-1d652a61133e","resolution":{"observed_at":"2026-08-10T14:32:52.735327Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-13T06:32:02.005865+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-13T06:32:02.005865+00:00","source":"crossref"},{"observed_at":"2026-08-13T06:31:53.387327+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":"2026-08-10T14:32:52.710041Z","title":"2023, MNRAS, 526, 2331","venue":null,"work_id":"36ef2043-ac71-4c94-9889-4b4eb552961c","year":2023},"citing_paper":{"arxiv_id":"2501.15254","last_updated":"2025-05-15T04:15:10Z","snapshot_observed_at":"2026-08-10T14:25:48.756016Z","submitted_at":"2025-01-25T15:58:49Z","title":"Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning","version":2},"reference_index":5,"source":"pdf_text","source_observed_at":"2026-08-10T14:32:51.549617Z"},"links":{"citing_paper":"/paper/2501.15254"},"observation_digest":"sha256:13f2d3ada40bfc31033724262860953f9e8d97ad7589cffac9df3573dc131e2e","observation_id":"13dc9795-0e09-407d-b7b0-1d7e623d19aa","resolution":{"observed_at":"2026-08-10T14:32:52.716057Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-13T06:32:02.005865+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-13T06:32:02.005865+00:00","source":"crossref"},{"observed_at":"2026-08-13T06:31:53.387327+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":"2026-08-10T14:32:52.690666Z","title":"2012, RAA, 12, 1197","venue":null,"work_id":"bb877501-58fc-427d-83c7-6f8fc3697717","year":2012},"citing_paper":{"arxiv_id":"2501.15254","last_updated":"2025-05-15T04:15:10Z","snapshot_observed_at":"2026-08-10T14:25:48.756016Z","submitted_at":"2025-01-25T15:58:49Z","title":"Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning","version":2},"reference_index":6,"source":"pdf_text","source_observed_at":"2026-08-10T14:32:51.555866Z"},"links":{"citing_paper":"/paper/2501.15254"},"observation_digest":"sha256:65d1dc684ceea569c40b931a6bb6a8957fe33e9da5301c0c6ad07071fe493fda","observation_id":"76cd586a-d43a-4e8f-a8ad-ac179fe324a3","resolution":{"observed_at":"2026-08-10T14:32:52.696485Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-13T06:32:02.005865+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-13T06:32:02.005865+00:00","source":"crossref"},{"observed_at":"2026-08-13T06:31:53.387327+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":"2026-08-10T14:32:51.562756Z","title":"N., Evans, J","venue":null,"work_id":null,"year":2024},"citing_paper":{"arxiv_id":"2501.15254","last_updated":"2025-05-15T04:15:10Z","snapshot_observed_at":"2026-08-10T14:25:48.756016Z","submitted_at":"2025-01-25T15:58:49Z","title":"Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning","version":2},"reference_index":7,"source":"pdf_text","source_observed_at":"2026-08-10T14:32:51.562756Z"},"links":{"citing_paper":"/paper/2501.15254"},"observation_digest":"sha256:319f87e539f7523ae7272b763f3812d1c3c5af66316bb31031da4f75e7aea7e5","observation_id":"8f7ad0f3-6212-4099-86bf-c8d6b1297ab5","resolution":{"observed_at":"2026-08-10T14:32:51.562756Z","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":"raw_reference","pith_arxiv_id":null,"snapshot_observed_at":"2026-08-10T14:32:52.660387Z","title":"2024, ApJS, 271, 54","venue":null,"work_id":"399c8b90-0cf0-47f3-9e71-31bd23ffd7fb","year":2024},"citing_paper":{"arxiv_id":"2501.15254","last_updated":"2025-05-15T04:15:10Z","snapshot_observed_at":"2026-08-10T14:25:48.756016Z","submitted_at":"2025-01-25T15:58:49Z","title":"Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning","version":2},"reference_index":8,"source":"pdf_text","source_observed_at":"2026-08-10T14:32:51.568091Z"},"links":{"citing_paper":"/paper/2501.15254"},"observation_digest":"sha256:e01edf157771669f04b4886d06187ceca61a0fc05017730127789bc393f4ad57","observation_id":"022bcff5-c8ea-444e-aabb-5e71edb82653","resolution":{"observed_at":"2026-08-10T14:32:52.665913Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-13T06:32:02.005865+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-13T06:32:02.005865+00:00","source":"crossref"},{"observed_at":"2026-08-13T06:31:53.387327+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":"2026-08-10T14:32:52.641692Z","title":"2021, ApJS, 254, 6","venue":null,"work_id":"e908fc19-b15e-4641-85f4-a0b0cdf01074","year":2021},"citing_paper":{"arxiv_id":"2501.15254","last_updated":"2025-05-15T04:15:10Z","snapshot_observed_at":"2026-08-10T14:25:48.756016Z","submitted_at":"2025-01-25T15:58:49Z","title":"Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning","version":2},"reference_index":9,"source":"pdf_text","source_observed_at":"2026-08-10T14:32:51.573006Z"},"links":{"citing_paper":"/paper/2501.15254"},"observation_digest":"sha256:b0922164c5b9d600f80ccaa36399afc36c6f20098417f1a2926a3be846f3fbd3","observation_id":"bf130869-8a04-49e4-9862-2ecbf6d5b27d","resolution":{"observed_at":"2026-08-10T14:32:52.647147Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-13T06:32:02.005865+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-13T06:32:02.005865+00:00","source":"crossref"},{"observed_at":"2026-08-13T06:31:53.387327+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":"2026-08-10T14:32:52.623407Z","title":"R., & Brandt, W","venue":null,"work_id":"5a328b53-0d5e-47f2-8ec6-563425cbe723","year":2012},"citing_paper":{"arxiv_id":"2501.15254","last_updated":"2025-05-15T04:15:10Z","snapshot_observed_at":"2026-08-10T14:25:48.756016Z","submitted_at":"2025-01-25T15:58:49Z","title":"Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning","version":2},"reference_index":10,"source":"pdf_text","source_observed_at":"2026-08-10T14:32:51.577931Z"},"links":{"citing_paper":"/paper/2501.15254"},"observation_digest":"sha256:618b2463980fb90a5cb72de195caaf9b48b1a4cad54acd0063b951dc8b4b1037","observation_id":"c04ccf4c-df7b-4bff-960c-137290219882","resolution":{"observed_at":"2026-08-10T14:32:52.628647Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-13T06:32:02.005865+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-13T06:32:02.005865+00:00","source":"crossref"},{"observed_at":"2026-08-13T06:31:53.387327+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":"2026-08-10T14:32:52.605504Z","title":"2012, A&A, 544, A80","venue":null,"work_id":"684be7e3-6375-476c-8d88-9e938c4e307f","year":2012},"citing_paper":{"arxiv_id":"2501.15254","last_updated":"2025-05-15T04:15:10Z","snapshot_observed_at":"2026-08-10T14:25:48.756016Z","submitted_at":"2025-01-25T15:58:49Z","title":"Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning","version":2},"reference_index":11,"source":"pdf_text","source_observed_at":"2026-08-10T14:32:51.584092Z"},"links":{"citing_paper":"/paper/2501.15254"},"observation_digest":"sha256:18c92e074da66918215bf78628851957912f6eb0bc80b3639c5517a1a76a2271","observation_id":"e5700a6e-6f3c-4a4d-8fc0-6b6c15abea5c","resolution":{"observed_at":"2026-08-10T14:32:52.611622Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-13T06:32:02.005865+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-13T06:32:02.005865+00:00","source":"crossref"},{"observed_at":"2026-08-13T06:31:53.387327+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":"2026-08-10T14:32:52.584064Z","title":"2015, ApJL, 803, L28","venue":null,"work_id":"a35f049f-2e79-491d-9ed3-92aa3508aff3","year":2015},"citing_paper":{"arxiv_id":"2501.15254","last_updated":"2025-05-15T04:15:10Z","snapshot_observed_at":"2026-08-10T14:25:48.756016Z","submitted_at":"2025-01-25T15:58:49Z","title":"Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning","version":2},"reference_index":12,"source":"pdf_text","source_observed_at":"2026-08-10T14:32:51.589196Z"},"links":{"citing_paper":"/paper/2501.15254"},"observation_digest":"sha256:4da12bb20d55f5980dddabcdf720543133afb191f870212f8f25f7715ccf1bb5","observation_id":"ceef92e4-431f-458e-9e5b-a27037b79c3b","resolution":{"observed_at":"2026-08-10T14:32:52.589961Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-13T06:32:02.005865+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-13T06:32:02.005865+00:00","source":"crossref"},{"observed_at":"2026-08-13T06:31:53.387327+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":"2026-08-10T14:32:52.562947Z","title":null,"venue":null,"work_id":"7ec488c4-a60a-46a5-bcf1-aebb94ef40c6","year":1995},"citing_paper":{"arxiv_id":"2501.15254","last_updated":"2025-05-15T04:15:10Z","snapshot_observed_at":"2026-08-10T14:25:48.756016Z","submitted_at":"2025-01-25T15:58:49Z","title":"Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning","version":2},"reference_index":13,"source":"pdf_text","source_observed_at":"2026-08-10T14:32:51.593932Z"},"links":{"citing_paper":"/paper/2501.15254"},"observation_digest":"sha256:b123011fa0492378f497542b8845d7488c6ed0bf5d38fe0f6ff6934c76a7d119","observation_id":"8ee2af32-bc5b-40ee-b7dd-9975ccc54ffd","resolution":{"observed_at":"2026-08-10T14:32:52.568884Z","resolver_source":"raw_fallback","status":"unresolved"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-13T06:32:02.005865+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-13T06:32:02.005865+00:00","source":"crossref"},{"observed_at":"2026-08-13T06:31:53.387327+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":"2026-08-10T14:32:52.540033Z","title":"2020, ApJ, 895, 114","venue":null,"work_id":"d885fff2-87bc-4725-b55d-ef86124f9c68","year":2020},"citing_paper":{"arxiv_id":"2501.15254","last_updated":"2025-05-15T04:15:10Z","snapshot_observed_at":"2026-08-10T14:25:48.756016Z","submitted_at":"2025-01-25T15:58:49Z","title":"Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning","version":2},"reference_index":14,"source":"pdf_text","source_observed_at":"2026-08-10T14:32:51.598777Z"},"links":{"citing_paper":"/paper/2501.15254"},"observation_digest":"sha256:c64fc12a4a21fe1220d440b4dad4b320a5ba5cab0551278e151ebacd7f8503b6","observation_id":"12c5c788-529f-4214-b43f-bfa8d36e5b83","resolution":{"observed_at":"2026-08-10T14:32:52.547822Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-13T06:32:02.005865+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-13T06:32:02.005865+00:00","source":"crossref"},{"observed_at":"2026-08-13T06:31:53.387327+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":"2026-08-10T14:32:51.603836Z","title":"2021, MNRAS, 507, 687","venue":null,"work_id":null,"year":2021},"citing_paper":{"arxiv_id":"2501.15254","last_updated":"2025-05-15T04:15:10Z","snapshot_observed_at":"2026-08-10T14:25:48.756016Z","submitted_at":"2025-01-25T15:58:49Z","title":"Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning","version":2},"reference_index":15,"source":"pdf_text","source_observed_at":"2026-08-10T14:32:51.603836Z"},"links":{"citing_paper":"/paper/2501.15254"},"observation_digest":"sha256:2f290a4607980cf24edfece3a667a7c2bfb8bcfd449fb5a39242e0d6c8e12e77","observation_id":"67defca9-470e-4ba3-be96-25359422baff","resolution":{"observed_at":"2026-08-10T14:32:51.603836Z","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":"2026-08-10T14:32:51.609503Z","title":"M., & Davis, S","venue":null,"work_id":null,"year":2019},"citing_paper":{"arxiv_id":"2501.15254","last_updated":"2025-05-15T04:15:10Z","snapshot_observed_at":"2026-08-10T14:25:48.756016Z","submitted_at":"2025-01-25T15:58:49Z","title":"Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning","version":2},"reference_index":16,"source":"pdf_text","source_observed_at":"2026-08-10T14:32:51.609503Z"},"links":{"citing_paper":"/paper/2501.15254"},"observation_digest":"sha256:39f6c988a9de96f237d95d33037955b93c704166f79dfe0666c9c961b5e2b765","observation_id":"fe943097-6cd3-48a8-80a7-9874f21e8b8c","resolution":{"observed_at":"2026-08-10T14:32:51.609503Z","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":"raw_reference","pith_arxiv_id":null,"snapshot_observed_at":"2026-08-10T14:32:52.485854Z","title":"2023, MNRAS, 518, 6065","venue":null,"work_id":"d982e935-d949-4412-bf66-1d4297ddaabc","year":2023},"citing_paper":{"arxiv_id":"2501.15254","last_updated":"2025-05-15T04:15:10Z","snapshot_observed_at":"2026-08-10T14:25:48.756016Z","submitted_at":"2025-01-25T15:58:49Z","title":"Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning","version":2},"reference_index":17,"source":"pdf_text","source_observed_at":"2026-08-10T14:32:51.614781Z"},"links":{"citing_paper":"/paper/2501.15254"},"observation_digest":"sha256:e4f096f8ec670741e5c33b1160fe21dde3f2592e7b12401fb5a0ad7384244064","observation_id":"94825129-3250-461b-bc15-4a3e4c1448c8","resolution":{"observed_at":"2026-08-10T14:32:52.491326Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-13T06:32:02.005865+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-13T06:32:02.005865+00:00","source":"crossref"},{"observed_at":"2026-08-13T06:31:53.387327+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":"2026-08-10T14:32:52.460553Z","title":"2017, A&A, 607, L9","venue":null,"work_id":"b4b2fe2a-f69e-45b2-b6e1-dfb0fe94a9cf","year":2017},"citing_paper":{"arxiv_id":"2501.15254","last_updated":"2025-05-15T04:15:10Z","snapshot_observed_at":"2026-08-10T14:25:48.756016Z","submitted_at":"2025-01-25T15:58:49Z","title":"Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning","version":2},"reference_index":18,"source":"pdf_text","source_observed_at":"2026-08-10T14:32:51.619736Z"},"links":{"citing_paper":"/paper/2501.15254"},"observation_digest":"sha256:41f81384286f6b7372387d7bc6e52f9e704b251aed8c30dfc00cf2afe5894ad6","observation_id":"9353ed76-ff7a-4e01-b736-9557c44771a3","resolution":{"observed_at":"2026-08-10T14:32:52.470331Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-13T06:32:02.005865+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-13T06:32:02.005865+00:00","source":"crossref"},{"observed_at":"2026-08-13T06:31:53.387327+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":"2026-08-10T14:32:52.440987Z","title":null,"venue":null,"work_id":"55db2c19-4102-41dc-a36b-e9d07da23f09","year":2022},"citing_paper":{"arxiv_id":"2501.15254","last_updated":"2025-05-15T04:15:10Z","snapshot_observed_at":"2026-08-10T14:25:48.756016Z","submitted_at":"2025-01-25T15:58:49Z","title":"Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning","version":2},"reference_index":19,"source":"pdf_text","source_observed_at":"2026-08-10T14:32:51.624902Z"},"links":{"citing_paper":"/paper/2501.15254"},"observation_digest":"sha256:ed6b54ca137d476a241534c9815a04764bbc6dfa73e342142d442910da90b68f","observation_id":"85cff9e1-bf0d-4c61-b33a-138f5c1eb0af","resolution":{"observed_at":"2026-08-10T14:32:52.447825Z","resolver_source":"raw_fallback","status":"unresolved"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-13T06:32:02.005865+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-13T06:32:02.005865+00:00","source":"crossref"},{"observed_at":"2026-08-13T06:31:53.387327+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":"2026-08-10T14:32:52.414731Z","title":"2020, MNRAS, 492, 2335","venue":null,"work_id":"d0abcba0-ee86-47ae-88ea-a7daddb5fff5","year":2020},"citing_paper":{"arxiv_id":"2501.15254","last_updated":"2025-05-15T04:15:10Z","snapshot_observed_at":"2026-08-10T14:25:48.756016Z","submitted_at":"2025-01-25T15:58:49Z","title":"Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning","version":2},"reference_index":20,"source":"pdf_text","source_observed_at":"2026-08-10T14:32:51.630521Z"},"links":{"citing_paper":"/paper/2501.15254"},"observation_digest":"sha256:5c34c50e2e9c78f8d69051e3f18f39212c939128ce456b90c17f446c7b9675c9","observation_id":"fb224295-a61b-4176-97d7-9f211279ab24","resolution":{"observed_at":"2026-08-10T14:32:52.422576Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-13T06:32:02.005865+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-13T06:32:02.005865+00:00","source":"crossref"},{"observed_at":"2026-08-13T06:31:53.387327+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":"2026-08-10T14:32:51.636125Z","title":"L., Zhao, Y.-H., Zhao, G., et al","venue":null,"work_id":null,"year":2015},"citing_paper":{"arxiv_id":"2501.15254","last_updated":"2025-05-15T04:15:10Z","snapshot_observed_at":"2026-08-10T14:25:48.756016Z","submitted_at":"2025-01-25T15:58:49Z","title":"Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning","version":2},"reference_index":21,"source":"pdf_text","source_observed_at":"2026-08-10T14:32:51.636125Z"},"links":{"citing_paper":"/paper/2501.15254"},"observation_digest":"sha256:6a585636a80b5bfd649f3759efd45a791c84950300dd7a8935adc1d0e93cc0b6","observation_id":"20c86eb2-b397-423f-94df-9a75a7efa84b","resolution":{"observed_at":"2026-08-10T14:32:51.636125Z","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":"raw_reference","pith_arxiv_id":null,"snapshot_observed_at":"2026-08-10T14:32:52.380754Z","title":"2019, PatRe, 91, 216","venue":null,"work_id":"9ae56894-1a29-4f9a-8c73-ab69a739ed66","year":2019},"citing_paper":{"arxiv_id":"2501.15254","last_updated":"2025-05-15T04:15:10Z","snapshot_observed_at":"2026-08-10T14:25:48.756016Z","submitted_at":"2025-01-25T15:58:49Z","title":"Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning","version":2},"reference_index":22,"source":"pdf_text","source_observed_at":"2026-08-10T14:32:51.642485Z"},"links":{"citing_paper":"/paper/2501.15254"},"observation_digest":"sha256:781f97e54b181d36c85818bd3386e223cfab41b7029a7c7d98c67afcb8344366","observation_id":"fc269885-f48f-4b64-83d1-c3945a23b2e6","resolution":{"observed_at":"2026-08-10T14:32:52.386295Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-13T06:32:02.005865+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-13T06:32:02.005865+00:00","source":"crossref"},{"observed_at":"2026-08-13T06:31:53.387327+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":"2026-08-10T14:32:52.358177Z","title":"M., Koerding, E., Knigge, C., Uttley, P., & Fender, R","venue":null,"work_id":"84277bc4-eacb-4147-b396-eb0ab55a07d5","year":2006},"citing_paper":{"arxiv_id":"2501.15254","last_updated":"2025-05-15T04:15:10Z","snapshot_observed_at":"2026-08-10T14:25:48.756016Z","submitted_at":"2025-01-25T15:58:49Z","title":"Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning","version":2},"reference_index":23,"source":"pdf_text","source_observed_at":"2026-08-10T14:32:51.647893Z"},"links":{"citing_paper":"/paper/2501.15254"},"observation_digest":"sha256:e5d01f562b298e72a58bc356bb2dad60dc834bc6a33f568484a15c8703ea0477","observation_id":"7f2abcb6-ff4e-4f7e-b794-2693afc9f623","resolution":{"observed_at":"2026-08-10T14:32:52.364600Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-13T06:32:02.005865+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-13T06:32:02.005865+00:00","source":"crossref"},{"observed_at":"2026-08-13T06:31:53.387327+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":"2026-08-10T14:32:52.333691Z","title":"Y., Sunyaev, R., & Khorunzhev, G","venue":null,"work_id":"6d19795d-59c4-4395-bb7d-31db0a784440","year":2022},"citing_paper":{"arxiv_id":"2501.15254","last_updated":"2025-05-15T04:15:10Z","snapshot_observed_at":"2026-08-10T14:25:48.756016Z","submitted_at":"2025-01-25T15:58:49Z","title":"Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning","version":2},"reference_index":24,"source":"pdf_text","source_observed_at":"2026-08-10T14:32:51.652794Z"},"links":{"citing_paper":"/paper/2501.15254"},"observation_digest":"sha256:7d902303a9c29b6029b37b6087bd1e2c2a431aa4d4f55a5316ad874e614ed59f","observation_id":"7193c8d4-6a2d-47a8-943c-ab0d935ca4b8","resolution":{"observed_at":"2026-08-10T14:32:52.339438Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-13T06:32:02.005865+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-13T06:32:02.005865+00:00","source":"crossref"},{"observed_at":"2026-08-13T06:31:53.387327+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":"2026-08-10T14:32:52.315510Z","title":"2021, A&A, 652, A150","venue":null,"work_id":"ea5c61db-34e1-4f02-a166-440ba0a76ecf","year":2021},"citing_paper":{"arxiv_id":"2501.15254","last_updated":"2025-05-15T04:15:10Z","snapshot_observed_at":"2026-08-10T14:25:48.756016Z","submitted_at":"2025-01-25T15:58:49Z","title":"Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning","version":2},"reference_index":25,"source":"pdf_text","source_observed_at":"2026-08-10T14:32:51.658055Z"},"links":{"citing_paper":"/paper/2501.15254"},"observation_digest":"sha256:fd96aec6307efd7d8cb8ec995431bfa7d2640c3863cce031e6a23a2ccb49d2b0","observation_id":"6e63349f-ff12-422c-814e-59408ea0b43c","resolution":{"observed_at":"2026-08-10T14:32:52.321327Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-13T06:32:02.005865+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-13T06:32:02.005865+00:00","source":"crossref"},{"observed_at":"2026-08-13T06:31:53.387327+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":"2026-08-10T14:32:51.663248Z","title":"2017, A&A, 599, A82","venue":null,"work_id":null,"year":2017},"citing_paper":{"arxiv_id":"2501.15254","last_updated":"2025-05-15T04:15:10Z","snapshot_observed_at":"2026-08-10T14:25:48.756016Z","submitted_at":"2025-01-25T15:58:49Z","title":"Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning","version":2},"reference_index":26,"source":"pdf_text","source_observed_at":"2026-08-10T14:32:51.663248Z"},"links":{"citing_paper":"/paper/2501.15254"},"observation_digest":"sha256:c3d7ed4c0c635eff0bd26171f27976c50785bdd45c1f1dd07b83f1cfd30d08a3","observation_id":"6503bb9b-a174-4ad2-89e9-2fa9c516c611","resolution":{"observed_at":"2026-08-10T14:32:51.663248Z","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":"raw_reference","pith_arxiv_id":null,"snapshot_observed_at":"2026-08-10T14:32:52.284268Z","title":"2020, ApJL, 889, L37","venue":null,"work_id":"17c3d2b0-86e7-4f74-9a02-6eb6c0230c0f","year":2020},"citing_paper":{"arxiv_id":"2501.15254","last_updated":"2025-05-15T04:15:10Z","snapshot_observed_at":"2026-08-10T14:25:48.756016Z","submitted_at":"2025-01-25T15:58:49Z","title":"Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning","version":2},"reference_index":27,"source":"pdf_text","source_observed_at":"2026-08-10T14:32:51.668321Z"},"links":{"citing_paper":"/paper/2501.15254"},"observation_digest":"sha256:9d6cd6ab6bb227a52a3818a3b44c62cf2f449b50e0dccd3b1e9874d8fcaf9029","observation_id":"5bb8de38-d48a-484f-8c99-37d00fcb87ce","resolution":{"observed_at":"2026-08-10T14:32:52.290031Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-13T06:32:02.005865+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-13T06:32:02.005865+00:00","source":"crossref"},{"observed_at":"2026-08-13T06:31:53.387327+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":"2026-08-10T14:32:52.264620Z","title":"L., Alston, W","venue":null,"work_id":"9fbd199d-01bd-4271-9b78-2ced190151dd","year":2021},"citing_paper":{"arxiv_id":"2501.15254","last_updated":"2025-05-15T04:15:10Z","snapshot_observed_at":"2026-08-10T14:25:48.756016Z","submitted_at":"2025-01-25T15:58:49Z","title":"Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning","version":2},"reference_index":28,"source":"pdf_text","source_observed_at":"2026-08-10T14:32:51.673595Z"},"links":{"citing_paper":"/paper/2501.15254"},"observation_digest":"sha256:e6f088ef016d0827095e28fd6ea4324ad129f3759d69d470f7dc5c5d94f28fcf","observation_id":"8f7ad29a-1b9d-4687-8c0d-c34c222e27c7","resolution":{"observed_at":"2026-08-10T14:32:52.271037Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-13T06:32:02.005865+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-13T06:32:02.005865+00:00","source":"crossref"},{"observed_at":"2026-08-13T06:31:53.387327+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":"2026-08-10T14:32:51.678420Z","title":"2011, JMLR, 12, 2825","venue":null,"work_id":null,"year":2011},"citing_paper":{"arxiv_id":"2501.15254","last_updated":"2025-05-15T04:15:10Z","snapshot_observed_at":"2026-08-10T14:25:48.756016Z","submitted_at":"2025-01-25T15:58:49Z","title":"Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning","version":2},"reference_index":29,"source":"pdf_text","source_observed_at":"2026-08-10T14:32:51.678420Z"},"links":{"citing_paper":"/paper/2501.15254"},"observation_digest":"sha256:fbf07c705e9d08c6b2b55afb9c0c76b668bcc74bffd84e372696a8c64edc37a4","observation_id":"95d7f195-d989-4a58-a4e3-2e905f354c38","resolution":{"observed_at":"2026-08-10T14:32:51.678420Z","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":"raw_reference","pith_arxiv_id":null,"snapshot_observed_at":"2026-08-10T14:32:52.233736Z","title":"2019, ApJ, 884, 80","venue":null,"work_id":"2a5028af-1b28-478c-a0d7-bb1f4824d9c6","year":2019},"citing_paper":{"arxiv_id":"2501.15254","last_updated":"2025-05-15T04:15:10Z","snapshot_observed_at":"2026-08-10T14:25:48.756016Z","submitted_at":"2025-01-25T15:58:49Z","title":"Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning","version":2},"reference_index":30,"source":"pdf_text","source_observed_at":"2026-08-10T14:32:51.683303Z"},"links":{"citing_paper":"/paper/2501.15254"},"observation_digest":"sha256:9c528b1962c7d8344313c8cc50c327a05a5e2a7fcfec6f8224a5dafaca4ea027","observation_id":"b8000885-0163-4a12-8538-560fa6a1d8ac","resolution":{"observed_at":"2026-08-10T14:32:52.239414Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-13T06:32:02.005865+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-13T06:32:02.005865+00:00","source":"crossref"},{"observed_at":"2026-08-13T06:31:53.387327+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":"2026-08-10T14:32:51.688014Z","title":"2020, ApJL, 898, L1","venue":null,"work_id":null,"year":2020},"citing_paper":{"arxiv_id":"2501.15254","last_updated":"2025-05-15T04:15:10Z","snapshot_observed_at":"2026-08-10T14:25:48.756016Z","submitted_at":"2025-01-25T15:58:49Z","title":"Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning","version":2},"reference_index":31,"source":"pdf_text","source_observed_at":"2026-08-10T14:32:51.688014Z"},"links":{"citing_paper":"/paper/2501.15254"},"observation_digest":"sha256:b3fbcc9829be13ed1a53badf4a108d54e71ea0ac04559454d4b3cc7aa616f645","observation_id":"92c2a1da-27e1-43c0-9965-7ed3d30a5f8a","resolution":{"observed_at":"2026-08-10T14:32:51.688014Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":{"arxiv_id":"1106.3507","last_updated":"2011-06-17T15:01:12Z","snapshot_observed_at":"2026-07-06T02:29:29.623307Z","submitted_at":"2011-06-17T15:01:12Z","title":"Long-term AGN variability and the case of GSN 069","version":1},"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":"1106.3507","snapshot_observed_at":"2026-08-10T14:32:51.692720Z","title":"2011, arXiv:1106.3507 Schlafly, E","venue":null,"work_id":null,"year":2011},"citing_paper":{"arxiv_id":"2501.15254","last_updated":"2025-05-15T04:15:10Z","snapshot_observed_at":"2026-08-10T14:25:48.756016Z","submitted_at":"2025-01-25T15:58:49Z","title":"Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning","version":2},"reference_index":32,"source":"pdf_text","source_observed_at":"2026-08-10T14:32:51.692720Z"},"links":{"cited_paper":"/paper/1106.3507","citing_paper":"/paper/2501.15254"},"observation_digest":"sha256:c757441a58c640ddffe83ca472c0a6305cd9a5a9e98c7191b51522bee3ae8f72","observation_id":"594c1074-92e5-4fdc-aa37-cfad27752c9c","resolution":{"observed_at":"2026-08-10T14:32:51.692720Z","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":"raw_reference","pith_arxiv_id":null,"snapshot_observed_at":"2026-08-10T14:32:52.201858Z","title":"L., et al","venue":null,"work_id":"45a6f443-3766-455b-928a-4cb57164852a","year":2016},"citing_paper":{"arxiv_id":"2501.15254","last_updated":"2025-05-15T04:15:10Z","snapshot_observed_at":"2026-08-10T14:25:48.756016Z","submitted_at":"2025-01-25T15:58:49Z","title":"Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning","version":2},"reference_index":33,"source":"pdf_text","source_observed_at":"2026-08-10T14:32:51.698021Z"},"links":{"citing_paper":"/paper/2501.15254"},"observation_digest":"sha256:7c32d52619f501917b3973d2844bb7e8854a1fa376b740ebfdce4cf49b42cbba","observation_id":"77e0b818-56dc-40a9-a484-1e06bfb3384b","resolution":{"observed_at":"2026-08-10T14:32:52.207567Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-13T06:32:02.005865+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-13T06:32:02.005865+00:00","source":"crossref"},{"observed_at":"2026-08-13T06:31:53.387327+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":"2026-08-10T14:32:52.180774Z","title":"1980, A&A, 86, 121","venue":null,"work_id":"892cbb5b-86bf-4fd2-bd27-6a7cc1c0ab50","year":1980},"citing_paper":{"arxiv_id":"2501.15254","last_updated":"2025-05-15T04:15:10Z","snapshot_observed_at":"2026-08-10T14:25:48.756016Z","submitted_at":"2025-01-25T15:58:49Z","title":"Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning","version":2},"reference_index":34,"source":"pdf_text","source_observed_at":"2026-08-10T14:32:51.702949Z"},"links":{"citing_paper":"/paper/2501.15254"},"observation_digest":"sha256:5843b4a196468c82addcd405ce45d797460fbb95e913000dd996b623f776c9ed","observation_id":"f8c7649a-ecf8-4e47-8145-fc7c331cb6e5","resolution":{"observed_at":"2026-08-10T14:32:52.187099Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-13T06:32:02.005865+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-13T06:32:02.005865+00:00","source":"crossref"},{"observed_at":"2026-08-13T06:31:53.387327+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":"2026-08-10T14:32:52.154266Z","title":null,"venue":null,"work_id":"50fda1ca-c754-4b0c-a7f5-9bd11a8e2092","year":2005},"citing_paper":{"arxiv_id":"2501.15254","last_updated":"2025-05-15T04:15:10Z","snapshot_observed_at":"2026-08-10T14:25:48.756016Z","submitted_at":"2025-01-25T15:58:49Z","title":"Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning","version":2},"reference_index":35,"source":"pdf_text","source_observed_at":"2026-08-10T14:32:51.708289Z"},"links":{"citing_paper":"/paper/2501.15254"},"observation_digest":"sha256:2b4a1df3bdeaf846278de81b5635814f01556fb352c2ea605cc310bba149e15e","observation_id":"f010afaf-595c-4452-ab5c-06faf706d3e6","resolution":{"observed_at":"2026-08-10T14:32:52.163748Z","resolver_source":"raw_fallback","status":"unresolved"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-13T06:32:02.005865+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-13T06:32:02.005865+00:00","source":"crossref"},{"observed_at":"2026-08-13T06:31:53.387327+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":"2026-08-10T14:32:52.131147Z","title":"D., III, Brandt, W","venue":null,"work_id":"870c70c8-70f5-4d5b-a24e-24e50b9e8384","year":2020},"citing_paper":{"arxiv_id":"2501.15254","last_updated":"2025-05-15T04:15:10Z","snapshot_observed_at":"2026-08-10T14:25:48.756016Z","submitted_at":"2025-01-25T15:58:49Z","title":"Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning","version":2},"reference_index":36,"source":"pdf_text","source_observed_at":"2026-08-10T14:32:51.713486Z"},"links":{"citing_paper":"/paper/2501.15254"},"observation_digest":"sha256:0a17b90958df290cb9996009150a338fcd74eecd52c75945b0303632dc13ee84","observation_id":"83d09874-cb01-4989-8a0b-9fc51355138d","resolution":{"observed_at":"2026-08-10T14:32:52.137371Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-13T06:32:02.005865+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-13T06:32:02.005865+00:00","source":"crossref"},{"observed_at":"2026-08-13T06:31:53.387327+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":"2026-08-10T14:32:51.718929Z","title":"J., et al","venue":null,"work_id":null,"year":2017},"citing_paper":{"arxiv_id":"2501.15254","last_updated":"2025-05-15T04:15:10Z","snapshot_observed_at":"2026-08-10T14:25:48.756016Z","submitted_at":"2025-01-25T15:58:49Z","title":"Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning","version":2},"reference_index":37,"source":"pdf_text","source_observed_at":"2026-08-10T14:32:51.718929Z"},"links":{"citing_paper":"/paper/2501.15254"},"observation_digest":"sha256:158f332a4319d8df0c38073f42470e0133b9988cba292c9ef3931eacd7a64262","observation_id":"06968e8a-1478-4850-af5e-8d9342e96bb0","resolution":{"observed_at":"2026-08-10T14:32:51.718929Z","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":"raw_reference","pith_arxiv_id":null,"snapshot_observed_at":"2026-08-10T14:32:52.098345Z","title":"2002, MNRAS, 332, 231","venue":null,"work_id":"66534a84-d0f7-4d70-ae8f-ccdfa888343f","year":2002},"citing_paper":{"arxiv_id":"2501.15254","last_updated":"2025-05-15T04:15:10Z","snapshot_observed_at":"2026-08-10T14:25:48.756016Z","submitted_at":"2025-01-25T15:58:49Z","title":"Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning","version":2},"reference_index":38,"source":"pdf_text","source_observed_at":"2026-08-10T14:32:51.724306Z"},"links":{"citing_paper":"/paper/2501.15254"},"observation_digest":"sha256:71089d3e9ff09bcd881db6e150ba809fb94c22720b396b30893a2045a25dbc46","observation_id":"f6ff8e9e-8e95-4ee3-abf5-792e0e072d9a","resolution":{"observed_at":"2026-08-10T14:32:52.103836Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-13T06:32:02.005865+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-13T06:32:02.005865+00:00","source":"crossref"},{"observed_at":"2026-08-13T06:31:53.387327+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":"2026-08-10T14:32:52.078799Z","title":"2000, yCat, 9029, 0","venue":null,"work_id":"24c15e6a-8eca-4a14-8d88-cd8e3ddfc0a0","year":2000},"citing_paper":{"arxiv_id":"2501.15254","last_updated":"2025-05-15T04:15:10Z","snapshot_observed_at":"2026-08-10T14:25:48.756016Z","submitted_at":"2025-01-25T15:58:49Z","title":"Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning","version":2},"reference_index":39,"source":"pdf_text","source_observed_at":"2026-08-10T14:32:51.729920Z"},"links":{"citing_paper":"/paper/2501.15254"},"observation_digest":"sha256:f9c3c038cc72784e8958b08b31d1a2b4dc911d77d454edfc745e0e33c6583991","observation_id":"643ffd00-4b43-49d2-807a-4f534a684e02","resolution":{"observed_at":"2026-08-10T14:32:52.085205Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-13T06:32:02.005865+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-13T06:32:02.005865+00:00","source":"crossref"},{"observed_at":"2026-08-13T06:31:53.387327+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":"2026-08-10T14:32:52.056093Z","title":"N., Luo, B., et al","venue":null,"work_id":"cfe3485c-4bb3-4e00-994b-f8b721cf6c7f","year":2024},"citing_paper":{"arxiv_id":"2501.15254","last_updated":"2025-05-15T04:15:10Z","snapshot_observed_at":"2026-08-10T14:25:48.756016Z","submitted_at":"2025-01-25T15:58:49Z","title":"Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning","version":2},"reference_index":40,"source":"pdf_text","source_observed_at":"2026-08-10T14:32:51.738031Z"},"links":{"citing_paper":"/paper/2501.15254"},"observation_digest":"sha256:a54aef51877b58b46de3833011386b95b250a8aaf21edf9205c7a13934a4b221","observation_id":"a9e2b3d3-c017-422c-88a0-9201be9a243e","resolution":{"observed_at":"2026-08-10T14:32:52.063431Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-13T06:32:02.005865+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-13T06:32:02.005865+00:00","source":"crossref"},{"observed_at":"2026-08-13T06:31:53.387327+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":"2026-08-10T14:32:52.034878Z","title":"2022, A&A, 657, A77","venue":null,"work_id":"41b68f38-52ed-42ab-a0d2-590e270e3f0e","year":2022},"citing_paper":{"arxiv_id":"2501.15254","last_updated":"2025-05-15T04:15:10Z","snapshot_observed_at":"2026-08-10T14:25:48.756016Z","submitted_at":"2025-01-25T15:58:49Z","title":"Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning","version":2},"reference_index":41,"source":"pdf_text","source_observed_at":"2026-08-10T14:32:51.743484Z"},"links":{"citing_paper":"/paper/2501.15254"},"observation_digest":"sha256:ce2c480069ffecb01e1ca9cc4442adbc1bdfb554717269038cee9a42ece6d9eb","observation_id":"28cfab81-eee6-48c8-8046-74dc835c161f","resolution":{"observed_at":"2026-08-10T14:32:52.040331Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-13T06:32:02.005865+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-13T06:32:02.005865+00:00","source":"crossref"},{"observed_at":"2026-08-13T06:31:53.387327+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":"2026-08-10T14:32:51.748674Z","title":"A., Coriat, M., Traulsen, I., et al","venue":null,"work_id":null,"year":2020},"citing_paper":{"arxiv_id":"2501.15254","last_updated":"2025-05-15T04:15:10Z","snapshot_observed_at":"2026-08-10T14:25:48.756016Z","submitted_at":"2025-01-25T15:58:49Z","title":"Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning","version":2},"reference_index":42,"source":"pdf_text","source_observed_at":"2026-08-10T14:32:51.748674Z"},"links":{"citing_paper":"/paper/2501.15254"},"observation_digest":"sha256:8b39a05f3a3a3fda2b02a4181bc690e7e0a16b4ee5182064543da891e6d20c1c","observation_id":"e8582828-6766-4b6b-934b-2d886c32cb45","resolution":{"observed_at":"2026-08-10T14:32:51.748674Z","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":"raw_reference","pith_arxiv_id":null,"snapshot_observed_at":"2026-08-10T14:32:52.000932Z","title":"2012, AJ, 144, 49","venue":null,"work_id":"34531e23-9f2f-4543-a66f-5db10d6bcbd2","year":2012},"citing_paper":{"arxiv_id":"2501.15254","last_updated":"2025-05-15T04:15:10Z","snapshot_observed_at":"2026-08-10T14:25:48.756016Z","submitted_at":"2025-01-25T15:58:49Z","title":"Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning","version":2},"reference_index":43,"source":"pdf_text","source_observed_at":"2026-08-10T14:32:51.753477Z"},"links":{"citing_paper":"/paper/2501.15254"},"observation_digest":"sha256:78162fdf72ac05fca04c20f21086adeb760e9693205920c19a47f1b16c5cadb6","observation_id":"dcec1cb4-c185-42c5-81ec-616393b2171d","resolution":{"observed_at":"2026-08-10T14:32:52.006398Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-13T06:32:02.005865+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-13T06:32:02.005865+00:00","source":"crossref"},{"observed_at":"2026-08-13T06:31:53.387327+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":"2026-08-10T14:32:51.979266Z","title":"D., & Li, X","venue":null,"work_id":"20ad04cc-6fe3-40da-9e5e-3e909ec6dd39","year":2022},"citing_paper":{"arxiv_id":"2501.15254","last_updated":"2025-05-15T04:15:10Z","snapshot_observed_at":"2026-08-10T14:25:48.756016Z","submitted_at":"2025-01-25T15:58:49Z","title":"Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning","version":2},"reference_index":44,"source":"pdf_text","source_observed_at":"2026-08-10T14:32:51.758923Z"},"links":{"citing_paper":"/paper/2501.15254"},"observation_digest":"sha256:16760ff0a2a2bd3b1aedf4d5af98f005447a14e2ad798f8964a2283107feaeec","observation_id":"316dd3d4-82c3-4cff-89e9-ce975ab5b639","resolution":{"observed_at":"2026-08-10T14:32:51.987563Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-13T06:32:02.005865+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-13T06:32:02.005865+00:00","source":"crossref"},{"observed_at":"2026-08-13T06:31:53.387327+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":"2026-08-10T14:32:51.960550Z","title":"2022, ApJ, 941, 104","venue":null,"work_id":"ff4ec178-ebc1-4f3e-a6a0-854c175d4645","year":2022},"citing_paper":{"arxiv_id":"2501.15254","last_updated":"2025-05-15T04:15:10Z","snapshot_observed_at":"2026-08-10T14:25:48.756016Z","submitted_at":"2025-01-25T15:58:49Z","title":"Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning","version":2},"reference_index":45,"source":"pdf_text","source_observed_at":"2026-08-10T14:32:51.764248Z"},"links":{"citing_paper":"/paper/2501.15254"},"observation_digest":"sha256:754e973458cd924e9742cdcf37832bdb03f9ebb2b21b38ff7e7e55280422cb4a","observation_id":"f1e2b420-132a-41e0-9f98-4fdf35afc65e","resolution":{"observed_at":"2026-08-10T14:32:51.966193Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-13T06:32:02.005865+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-13T06:32:02.005865+00:00","source":"crossref"},{"observed_at":"2026-08-13T06:31:53.387327+00:00","source":"retraction_watch"}],"state":"measured"}},{"citation":{"cited_paper":{"arxiv_id":"2408.16595","last_updated":"2024-08-29T15:00:35Z","snapshot_observed_at":"2026-08-13T03:07:38.324435Z","submitted_at":"2024-08-29T15:00:35Z","title":"Wind from the Hot Accretion Flow and Super-Eddington Accretion Flow","version":1},"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":"2408.16595","snapshot_observed_at":"2026-08-10T14:32:51.769491Z","title":"2024, arXiv: 2408.16595","venue":null,"work_id":null,"year":2024},"citing_paper":{"arxiv_id":"2501.15254","last_updated":"2025-05-15T04:15:10Z","snapshot_observed_at":"2026-08-10T14:25:48.756016Z","submitted_at":"2025-01-25T15:58:49Z","title":"Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning","version":2},"reference_index":46,"source":"pdf_text","source_observed_at":"2026-08-10T14:32:51.769491Z"},"links":{"cited_paper":"/paper/2408.16595","citing_paper":"/paper/2501.15254"},"observation_digest":"sha256:116c005ecb49ac370370e7fa76b1fee92023eff20a78ba3c5bef162967544898","observation_id":"c3e59be3-cebe-481a-b3a7-b5e9a9d467eb","resolution":{"observed_at":"2026-08-10T14:32:51.769491Z","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":"raw_reference","pith_arxiv_id":null,"snapshot_observed_at":"2026-08-10T14:32:51.940241Z","title":"J., MacLeod, C","venue":null,"work_id":"e35796cc-3971-48ed-b592-297d0d431842","year":2023},"citing_paper":{"arxiv_id":"2501.15254","last_updated":"2025-05-15T04:15:10Z","snapshot_observed_at":"2026-08-10T14:25:48.756016Z","submitted_at":"2025-01-25T15:58:49Z","title":"Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning","version":2},"reference_index":47,"source":"pdf_text","source_observed_at":"2026-08-10T14:32:51.774666Z"},"links":{"citing_paper":"/paper/2501.15254"},"observation_digest":"sha256:9525343db95945db887b0f8594e423d426ec88f6b04167f4379f80a1e165e583","observation_id":"bf3da656-3f98-4a86-ad98-15cc93c6961f","resolution":{"observed_at":"2026-08-10T14:32:51.946473Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-13T06:32:02.005865+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-13T06:32:02.005865+00:00","source":"crossref"},{"observed_at":"2026-08-13T06:31:53.387327+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":"2026-08-10T14:32:51.779385Z","title":"G., Adelman, J., Anderson, J","venue":null,"work_id":null,"year":2000},"citing_paper":{"arxiv_id":"2501.15254","last_updated":"2025-05-15T04:15:10Z","snapshot_observed_at":"2026-08-10T14:25:48.756016Z","submitted_at":"2025-01-25T15:58:49Z","title":"Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning","version":2},"reference_index":48,"source":"pdf_text","source_observed_at":"2026-08-10T14:32:51.779385Z"},"links":{"citing_paper":"/paper/2501.15254"},"observation_digest":"sha256:6fa9f206127222c854334222cf35a1c923421a849171a44f2cd24b9549ed2c97","observation_id":"8eb229fc-1b39-4aa5-87df-35abc0ecba30","resolution":{"observed_at":"2026-08-10T14:32:51.779385Z","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":"2026-08-10T14:32:51.784550Z","title":"2014, ARA&A, 52, 529","venue":null,"work_id":null,"year":2014},"citing_paper":{"arxiv_id":"2501.15254","last_updated":"2025-05-15T04:15:10Z","snapshot_observed_at":"2026-08-10T14:25:48.756016Z","submitted_at":"2025-01-25T15:58:49Z","title":"Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning","version":2},"reference_index":49,"source":"pdf_text","source_observed_at":"2026-08-10T14:32:51.784550Z"},"links":{"citing_paper":"/paper/2501.15254"},"observation_digest":"sha256:a61f2572afb91c8e3f043e5511335c13d344dbe97a547b43e9f536b2f1c870d0","observation_id":"a48132d3-5fa4-4212-a6ab-95d19d063eac","resolution":{"observed_at":"2026-08-10T14:32:51.784550Z","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":"raw_reference","pith_arxiv_id":null,"snapshot_observed_at":"2026-08-10T14:32:51.894565Z","title":"2021, MNRAS, 503, 5263","venue":null,"work_id":"4c368fb0-7d70-4998-ab81-df061855c37a","year":2021},"citing_paper":{"arxiv_id":"2501.15254","last_updated":"2025-05-15T04:15:10Z","snapshot_observed_at":"2026-08-10T14:25:48.756016Z","submitted_at":"2025-01-25T15:58:49Z","title":"Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning","version":2},"reference_index":50,"source":"pdf_text","source_observed_at":"2026-08-10T14:32:51.789386Z"},"links":{"citing_paper":"/paper/2501.15254"},"observation_digest":"sha256:0f9f7b5640bb299054a9b291feeb6ec9333f843b53f01736b66dbceebdd2f744","observation_id":"c8a399c0-fe4d-4908-8dbd-e1dcf0b2f1d4","resolution":{"observed_at":"2026-08-10T14:32:51.899773Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-13T06:32:02.005865+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-13T06:32:02.005865+00:00","source":"crossref"},{"observed_at":"2026-08-13T06:31:53.387327+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":"2026-08-10T14:32:51.875137Z","title":"2025, ApJ, 983, 36Z 12 The Astrophysical Journal, 985:23 (12pp), 2025 May 20 Wang et al","venue":null,"work_id":"d6ff9a76-5f9b-4f05-a2ea-493ae55309e6","year":2025},"citing_paper":{"arxiv_id":"2501.15254","last_updated":"2025-05-15T04:15:10Z","snapshot_observed_at":"2026-08-10T14:25:48.756016Z","submitted_at":"2025-01-25T15:58:49Z","title":"Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning","version":2},"reference_index":51,"source":"pdf_text","source_observed_at":"2026-08-10T14:32:51.794471Z"},"links":{"citing_paper":"/paper/2501.15254"},"observation_digest":"sha256:3cc5a5dcffc332a747110aa80265eb8ea6fc2204d515025e45c5bbcfe47ce394","observation_id":"cf00169a-a52b-4b7e-a7e0-1cf606fff3bb","resolution":{"observed_at":"2026-08-10T14:32:51.881635Z","resolver_source":"raw_fallback","status":"verified_fuzzy"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-13T06:32:02.005865+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-13T06:32:02.005865+00:00","source":"crossref"},{"observed_at":"2026-08-13T06:31:53.387327+00:00","source":"retraction_watch"}],"state":"measured"}}],"paper":{"arxiv_id":"2501.15254","last_updated":"2025-05-15T04:15:10Z","latest_version":2,"primary_category":"astro-ph.GA","snapshot_observed_at":"2026-08-10T14:25:48.756016Z","submitted_at":"2025-01-25T15:58:49Z","title":"Highly Variable Quasar Candidates Selected from 4XMM-DR13 with Machine Learning"},"reference_resolution":{"displayed":51,"state_counts":{"malformed_identifier":0,"metadata_mismatch":0,"parse_uncertain":0,"unresolved":16,"verified_exact":0,"verified_fuzzy":35},"total_outbound_references":51},"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":"2026-08-13T06:32:02.005865+00:00","source":"crossref"},{"observed_at":"2026-08-13T06:31:53.387327+00:00","source":"retraction_watch"}],"thesis":"As of 13 August 2026, this Paper Citation Record lists 51 of 51 outbound references and 0 inbound Pith citation observations for arXiv:2501.15254."}