{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2017:XWOQ7ZMY4HPO35GMSVKT63H2C2","short_pith_number":"pith:XWOQ7ZMY","schema_version":"1.0","canonical_sha256":"bd9d0fe598e1deedf4cc95553f6cfa16886c9917b32577ba87182daf1ae6c6a9","source":{"kind":"arxiv","id":"1709.06258","version":1},"attestation_state":"computed","paper":{"title":"A candidate sub-parsec binary black hole in the Seyfert galaxy NGC 7674","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"David Merritt (RIT), Dharam Vir Lal (NCRA-TIFR), Preeti Kharb (NCRA-TIFR)","submitted_at":"2017-09-19T05:09:47Z","abstract_excerpt":"The existence of binary supermassive black holes (SBHs) is predicted by models of hierarchical galaxy formation. To date, only a single binary SBH has been imaged, at a projected separation of 7.3 parsecs. Here we report the detection of a candidate dual SBH with projected separation of 0.35 pc in the gas-rich interacting spiral galaxy NGC 7674 (Mrk 533). This peculiar Seyfert galaxy possesses a $\\sim$0.7 kpc Z-shaped radio jet; the leading model for the formation of such sources postulates the presence of an uncoalesced binary SBH created during the infall of a satellite galaxy. Using very lo"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1709.06258","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-09-19T05:09:47Z","cross_cats_sorted":[],"title_canon_sha256":"7f45997aba0f111cf13a5fc0e769ef2a9e28da4446c5c7ac1177dda79b95b3ff","abstract_canon_sha256":"4d73baafb51970db72670941c0c42029f9b12f5ffc053d7af588a8de552a7b0e"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:34:28.698910Z","signature_b64":"OmpCrTUO5F2kPgRVFU11VqHYxMgDsMUFTlu6ewRI1U6K3N8chAEySKgRjQ2dhZFySIm3BXkYB4Y0IG3+Jxq+Ag==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bd9d0fe598e1deedf4cc95553f6cfa16886c9917b32577ba87182daf1ae6c6a9","last_reissued_at":"2026-05-18T00:34:28.698419Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:34:28.698419Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"A candidate sub-parsec binary black hole in the Seyfert galaxy NGC 7674","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"David Merritt (RIT), Dharam Vir Lal (NCRA-TIFR), Preeti Kharb (NCRA-TIFR)","submitted_at":"2017-09-19T05:09:47Z","abstract_excerpt":"The existence of binary supermassive black holes (SBHs) is predicted by models of hierarchical galaxy formation. To date, only a single binary SBH has been imaged, at a projected separation of 7.3 parsecs. Here we report the detection of a candidate dual SBH with projected separation of 0.35 pc in the gas-rich interacting spiral galaxy NGC 7674 (Mrk 533). This peculiar Seyfert galaxy possesses a $\\sim$0.7 kpc Z-shaped radio jet; the leading model for the formation of such sources postulates the presence of an uncoalesced binary SBH created during the infall of a satellite galaxy. Using very lo"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1709.06258","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"aliases":[{"alias_kind":"arxiv","alias_value":"1709.06258","created_at":"2026-05-18T00:34:28.698503+00:00"},{"alias_kind":"arxiv_version","alias_value":"1709.06258v1","created_at":"2026-05-18T00:34:28.698503+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1709.06258","created_at":"2026-05-18T00:34:28.698503+00:00"},{"alias_kind":"pith_short_12","alias_value":"XWOQ7ZMY4HPO","created_at":"2026-05-18T12:31:56.362134+00:00"},{"alias_kind":"pith_short_16","alias_value":"XWOQ7ZMY4HPO35GM","created_at":"2026-05-18T12:31:56.362134+00:00"},{"alias_kind":"pith_short_8","alias_value":"XWOQ7ZMY","created_at":"2026-05-18T12:31:56.362134+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/XWOQ7ZMY4HPO35GMSVKT63H2C2","json":"https://pith.science/pith/XWOQ7ZMY4HPO35GMSVKT63H2C2.json","graph_json":"https://pith.science/api/pith-number/XWOQ7ZMY4HPO35GMSVKT63H2C2/graph.json","events_json":"https://pith.science/api/pith-number/XWOQ7ZMY4HPO35GMSVKT63H2C2/events.json","paper":"https://pith.science/paper/XWOQ7ZMY"},"agent_actions":{"view_html":"https://pith.science/pith/XWOQ7ZMY4HPO35GMSVKT63H2C2","download_json":"https://pith.science/pith/XWOQ7ZMY4HPO35GMSVKT63H2C2.json","view_paper":"https://pith.science/paper/XWOQ7ZMY","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1709.06258&json=true","fetch_graph":"https://pith.science/api/pith-number/XWOQ7ZMY4HPO35GMSVKT63H2C2/graph.json","fetch_events":"https://pith.science/api/pith-number/XWOQ7ZMY4HPO35GMSVKT63H2C2/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/XWOQ7ZMY4HPO35GMSVKT63H2C2/action/timestamp_anchor","attest_storage":"https://pith.science/pith/XWOQ7ZMY4HPO35GMSVKT63H2C2/action/storage_attestation","attest_author":"https://pith.science/pith/XWOQ7ZMY4HPO35GMSVKT63H2C2/action/author_attestation","sign_citation":"https://pith.science/pith/XWOQ7ZMY4HPO35GMSVKT63H2C2/action/citation_signature","submit_replication":"https://pith.science/pith/XWOQ7ZMY4HPO35GMSVKT63H2C2/action/replication_record"}},"created_at":"2026-05-18T00:34:28.698503+00:00","updated_at":"2026-05-18T00:34:28.698503+00:00"}