{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:TIXGTWFTVKRZPCJU6AZAGYAKFS","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":"85796221df0cf6e91222e33c226c7bb08a1159d77626e54d9f8c2c1c969ba909","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2024-03-27T16:51:00Z","title_canon_sha256":"f570b301bc37de08aac8e79572957ac912e34e521bd05a28d8bb4c6f57120327"},"schema_version":"1.0","source":{"id":"2403.18751","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2403.18751","created_at":"2026-07-05T08:01:26Z"},{"alias_kind":"arxiv_version","alias_value":"2403.18751v1","created_at":"2026-07-05T08:01:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2403.18751","created_at":"2026-07-05T08:01:26Z"},{"alias_kind":"pith_short_12","alias_value":"TIXGTWFTVKRZ","created_at":"2026-07-05T08:01:26Z"},{"alias_kind":"pith_short_16","alias_value":"TIXGTWFTVKRZPCJU","created_at":"2026-07-05T08:01:26Z"},{"alias_kind":"pith_short_8","alias_value":"TIXGTWFT","created_at":"2026-07-05T08:01:26Z"}],"graph_snapshots":[{"event_id":"sha256:613d05c86ff9f673f5e92ba57e818669726012e0eac0f8dc8ac511bfb654f4ed","target":"graph","created_at":"2026-07-05T08:01:26Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2403.18751/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The Vera C. Rubin Observatory's Legacy Survey of Space and Time (LSST) will catalogue the light-curves of up to 100 million quasars. Among these there can be up to approximately 100 ultra-compact massive black hole (MBH) binaries, which 5-15 years later can be detected in gravitational waves (GWs) by the Laser Interferometer Space Antenna (LISA). Here we assume that GWs from a MBH binary have been detected by LISA, and we assess whether or not its electromagnetic (EM) counterpart can be uniquely identified in archival LSST data as a periodic quasar. We use the binary's properties derived from ","authors_text":"Chengcheng Xin, Zoltan Haiman","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2024-03-27T16:51:00Z","title":"Identifying the electromagnetic counterparts of LISA massive black hole binaries in archival LSST data"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2403.18751","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:cab44a18c4a48bb2c2900b9210194a9af53cd251ecdcbb162dda17b7af074d92","target":"record","created_at":"2026-07-05T08:01:26Z","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":"85796221df0cf6e91222e33c226c7bb08a1159d77626e54d9f8c2c1c969ba909","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2024-03-27T16:51:00Z","title_canon_sha256":"f570b301bc37de08aac8e79572957ac912e34e521bd05a28d8bb4c6f57120327"},"schema_version":"1.0","source":{"id":"2403.18751","kind":"arxiv","version":1}},"canonical_sha256":"9a2e69d8b3aaa3978934f03203600a2cbf0239238fa7bc708391763a9016b0d9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9a2e69d8b3aaa3978934f03203600a2cbf0239238fa7bc708391763a9016b0d9","first_computed_at":"2026-07-05T08:01:26.537292Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T08:01:26.537292Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"0cGhzKjuF44s3gjbaUh1FjpsEdkHDB6lIIYeUGlw7WpwDYbNET085sArryUz8TaO/MTqaAy+zrlT2VPYMHaEAQ==","signature_status":"signed_v1","signed_at":"2026-07-05T08:01:26.537750Z","signed_message":"canonical_sha256_bytes"},"source_id":"2403.18751","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cab44a18c4a48bb2c2900b9210194a9af53cd251ecdcbb162dda17b7af074d92","sha256:613d05c86ff9f673f5e92ba57e818669726012e0eac0f8dc8ac511bfb654f4ed"],"state_sha256":"f3526a695509d413f0cf9b0617d40127510033bfbe8b271a20fb8d2e4382ad89"}