{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:ZXJXYJQUYOOT7C7F5TUGE2JW4P","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"3f39dec90f674a9a9b9d04e98cdb91fbd7ae79045e579b10eff54776e43b4619","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-12-08T19:05:28Z","title_canon_sha256":"4ac6b5fc573f878c1247764bdc2019d37a11e830b16df30ddc2ca17b2807cb7a"},"schema_version":"1.0","source":{"id":"1812.03370","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1812.03370","created_at":"2026-05-17T23:55:10Z"},{"alias_kind":"arxiv_version","alias_value":"1812.03370v1","created_at":"2026-05-17T23:55:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1812.03370","created_at":"2026-05-17T23:55:10Z"},{"alias_kind":"pith_short_12","alias_value":"ZXJXYJQUYOOT","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_16","alias_value":"ZXJXYJQUYOOT7C7F","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_8","alias_value":"ZXJXYJQU","created_at":"2026-05-18T12:33:07Z"}],"graph_snapshots":[{"event_id":"sha256:f1d9b14e3963b87f9029a760467b8d59f74ba6104ee1577afe11df032e325738","target":"graph","created_at":"2026-05-17T23:55:10Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"The photometric light curve of PG1302-102 shows periodic variability which makes this object one of the most plausible supermassive black hole binary candidate. Interestingly, the most recent study of its updated optical light curve reports a decrease in significance of periodicity which may suggest that the binary model is less favorable. Here, we model the PG 1302-102 light curve, spanning almost 20 years, with a supermassive black hole binary system in which a perturbation in the accretion disk of more massive component is present. Our model reproduces well the observed light curve with a s","authors_text":"Andjelka B. Kovacevic, Dragana Ilic, Luka C. Popovic, Sasa Simic","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-12-08T19:05:28Z","title":"The optical variability of Supermassive Black Hole Binary Candidate PG1302-102: Periodicity and perturbation in the light curve"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.03370","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:f2cf7bbb1de3866c8c211e44c4d6ffe1e09373326f2c95edc8b177bce852d883","target":"record","created_at":"2026-05-17T23:55:10Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"3f39dec90f674a9a9b9d04e98cdb91fbd7ae79045e579b10eff54776e43b4619","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-12-08T19:05:28Z","title_canon_sha256":"4ac6b5fc573f878c1247764bdc2019d37a11e830b16df30ddc2ca17b2807cb7a"},"schema_version":"1.0","source":{"id":"1812.03370","kind":"arxiv","version":1}},"canonical_sha256":"cdd37c2614c39d3f8be5ece8626936e3d58cffdc9d1c8a651aadd9e6fdb771cc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cdd37c2614c39d3f8be5ece8626936e3d58cffdc9d1c8a651aadd9e6fdb771cc","first_computed_at":"2026-05-17T23:55:10.708242Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:55:10.708242Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"cA+rYzy160LTDPjLIQpTIAcBFXiQ62zG8ynUuzKGFKdhaQn82CyOw5udjooQKrtTznxHQZw4d7IrFQMwAukVDw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:55:10.708624Z","signed_message":"canonical_sha256_bytes"},"source_id":"1812.03370","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f2cf7bbb1de3866c8c211e44c4d6ffe1e09373326f2c95edc8b177bce852d883","sha256:f1d9b14e3963b87f9029a760467b8d59f74ba6104ee1577afe11df032e325738"],"state_sha256":"7dd2a59ddb8b21348888ed16595b773c8d82788c5efc1101f2136ed3ebf410ea"}