{"as_of":"2026-08-13T13:02:00Z","caps":{"database_statements":6,"inbound":100,"outbound":100},"context_digest":"sha256:1b310893094ddf4fc47bbcce6e67c8552a401522ff2aaf5820c4cf70aae167c8","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":5,"lane":"standing_notices","note":"One-hop event checks from named stored sources.","records_observed":5,"source":"scholarly_work_events, retraction_status_cache","source_observed_at":"2026-08-13T06:32:02.005865+00:00","state":"measured"},{"denominator":5,"lane":"inbound_itemization","note":"Pith citing papers itemized under the disclosed page cap.","records_observed":5,"source":"paper_references, paper_reference_links","source_observed_at":"2026-08-12T17:49:34.073197Z","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":"2026-07-03T15:08:32.965014Z","state":"measured"}],"external_citation_measurements":[],"inbound":[{"citation":{"cited_paper":{"arxiv_id":"1904.07923","last_updated":"2019-11-26T17:12:26Z","snapshot_observed_at":"2026-07-06T07:46:34.901111Z","submitted_at":"2019-04-16T18:56:19Z","title":"Measurement of the spin of the M87 black hole from its observed twisted light","version":4},"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":"1904.07923","snapshot_observed_at":"2026-08-12T17:49:34.073197Z","title":"Measurement of the spin of the M87 black hole from its observed twisted light,","venue":null,"work_id":null,"year":2020},"citing_paper":{"arxiv_id":"2411.12358","last_updated":"2024-11-19T09:19:24Z","snapshot_observed_at":"2026-08-12T22:53:00.853334Z","submitted_at":"2024-11-19T09:19:24Z","title":"Anisotropic gravastar as horizonless regular black hole spacetime and its images illuminated by thin accretion disk","version":1},"reference_index":73,"source":"pdf_text","source_observed_at":"2026-08-12T17:49:34.073197Z"},"links":{"cited_paper":"/paper/1904.07923","citing_paper":"/paper/2411.12358"},"observation_digest":"sha256:9fcd2a371d174c85238cdff387d9a415e142b8d0f5fbfd9fc8dd9b01eca367b4","observation_id":"4a8fabf7-b6ab-4f39-b13c-12472fe4f116","resolution":{"observed_at":"2026-08-12T17:49:34.073197Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":{"arxiv_id":"1904.07923","last_updated":"2019-11-26T17:12:26Z","snapshot_observed_at":"2026-07-06T07:46:34.901111Z","submitted_at":"2019-04-16T18:56:19Z","title":"Measurement of the spin of the M87 black hole from its observed twisted light","version":4},"cited_work":{"arxiv_id":"1904.07923","doi":null,"metadata_source":"arxiv_reference","pith_arxiv_id":"1904.07923","snapshot_observed_at":"2026-07-03T15:08:32.965014Z","title":"Tamburini, B","venue":null,"work_id":"0d713c72-7c0d-4768-9e55-15a72f0d44c9","year":2020},"citing_paper":{"arxiv_id":"2511.16244","last_updated":"2026-04-27T06:56:08Z","snapshot_observed_at":"2026-08-03T21:51:02.344479Z","submitted_at":"2025-11-20T11:24:10Z","title":"Constraining interacting dark energy models with black hole superradiance","version":3},"reference_index":99,"source":"pdf_text","source_observed_at":"2026-05-17T21:08:20.630611Z"},"links":{"cited_paper":"/paper/1904.07923","citing_paper":"/paper/2511.16244"},"observation_digest":"sha256:25e94cf7ed16432d4e0ca074d6420f20c35a630e21bc8f7f9648443b40413bd1","observation_id":"64347ab7-8933-4f9e-8408-d4ec67c8c08f","resolution":{"observed_at":"2026-05-17T21:10:16.918905Z","resolver_source":"arxiv_id","status":"verified_exact"},"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":"1904.07923","last_updated":"2019-11-26T17:12:26Z","snapshot_observed_at":"2026-07-06T07:46:34.901111Z","submitted_at":"2019-04-16T18:56:19Z","title":"Measurement of the spin of the M87 black hole from its observed twisted light","version":4},"cited_work":{"arxiv_id":"1904.07923","doi":null,"metadata_source":"arxiv_reference","pith_arxiv_id":"1904.07923","snapshot_observed_at":"2026-07-03T15:08:32.965014Z","title":"Tamburini, B","venue":null,"work_id":"0d713c72-7c0d-4768-9e55-15a72f0d44c9","year":2020},"citing_paper":{"arxiv_id":"2512.06051","last_updated":"2026-03-13T12:54:49Z","snapshot_observed_at":"2026-08-12T22:42:37.524208Z","submitted_at":"2025-12-05T11:26:03Z","title":"Investigating the interplay of the braneworld gravity and the plasma environment on the black hole shadow","version":2},"reference_index":78,"source":"pdf_text","source_observed_at":"2026-05-17T01:30:15.249282Z"},"links":{"cited_paper":"/paper/1904.07923","citing_paper":"/paper/2512.06051"},"observation_digest":"sha256:52c1eac13c9b0c26a0afe546f43e873d51009bae5934b80941db56ec65fe13c4","observation_id":"647904ad-4492-4152-abdf-9d5b920c3554","resolution":{"observed_at":"2026-05-17T01:31:24.721444Z","resolver_source":"arxiv_id","status":"metadata_mismatch"},"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":"1904.07923","last_updated":"2019-11-26T17:12:26Z","snapshot_observed_at":"2026-07-06T07:46:34.901111Z","submitted_at":"2019-04-16T18:56:19Z","title":"Measurement of the spin of the M87 black hole from its observed twisted light","version":4},"cited_work":{"arxiv_id":"1904.07923","doi":null,"metadata_source":"arxiv_reference","pith_arxiv_id":"1904.07923","snapshot_observed_at":"2026-07-03T15:08:32.965014Z","title":"Tamburini, B","venue":null,"work_id":"0d713c72-7c0d-4768-9e55-15a72f0d44c9","year":2020},"citing_paper":{"arxiv_id":"2605.22696","last_updated":"2026-05-21T16:38:45Z","snapshot_observed_at":"2026-08-02T20:48:06.501985Z","submitted_at":"2026-05-21T16:38:45Z","title":"Dimming of Photon Ring due to Photon-Axion Conversion around Kerr Black Holes","version":1},"reference_index":94,"source":"pdf_text","source_observed_at":"2026-05-22T04:39:27.221464Z"},"links":{"cited_paper":"/paper/1904.07923","citing_paper":"/paper/2605.22696"},"observation_digest":"sha256:9390ca764b1bf7b634e20a5ecae9c7a71549e3db12f5be4c30ad4fe66dc4d299","observation_id":"33aff669-e98d-4950-a93d-fc364d5c456b","resolution":{"observed_at":"2026-05-22T04:41:04.005583Z","resolver_source":"arxiv_id","status":"verified_exact"},"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":"1904.07923","last_updated":"2019-11-26T17:12:26Z","snapshot_observed_at":"2026-07-06T07:46:34.901111Z","submitted_at":"2019-04-16T18:56:19Z","title":"Measurement of the spin of the M87 black hole from its observed twisted light","version":4},"cited_work":{"arxiv_id":"1904.07923","doi":null,"metadata_source":"arxiv_reference","pith_arxiv_id":"1904.07923","snapshot_observed_at":"2026-07-03T15:08:32.965014Z","title":"Tamburini, B","venue":null,"work_id":"0d713c72-7c0d-4768-9e55-15a72f0d44c9","year":2020},"citing_paper":{"arxiv_id":"2606.12784","last_updated":"2026-06-11T00:57:08Z","snapshot_observed_at":"2026-07-29T21:06:51.687638Z","submitted_at":"2026-06-11T00:57:08Z","title":"Constraining Kerr supermassive black hole properties using gravitational waves from inspiraling stellar-mass binary black holes","version":1},"reference_index":79,"source":"pdf_text","source_observed_at":"2026-06-27T06:41:50.946674Z"},"links":{"cited_paper":"/paper/1904.07923","citing_paper":"/paper/2606.12784"},"observation_digest":"sha256:f9602fffcd7d525b7d56c4a4c5e4588bfb0cf0a04ab61112086d851a7c4fe1e3","observation_id":"60e4dbcd-1101-495c-8a1f-143839854c0a","resolution":{"observed_at":"2026-07-03T15:08:32.966328Z","resolver_source":"arxiv_id","status":"verified_exact"},"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"}}],"links":{"evidence":"/evidence","html":"/paper/1904.07923/citation-record","integrity":"/paper/1904.07923/integrity","json":"/paper/1904.07923/citation-record.json","paper":"/paper/1904.07923"},"outbound":[],"paper":{"arxiv_id":"1904.07923","last_updated":"2019-11-26T17:12:26Z","latest_version":4,"primary_category":"astro-ph.HE","snapshot_observed_at":"2026-07-06T07:46:34.901111Z","submitted_at":"2019-04-16T18:56:19Z","title":"Measurement of the spin of the M87 black hole from its observed twisted light"},"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":"2026-08-13T06:32:02.005865+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 0 of 0 outbound references and 5 inbound Pith citation observations for arXiv:1904.07923."}