{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2025:3VYQJFHBTT5F67WK3PLLB4PBP7","short_pith_number":"pith:3VYQJFHB","schema_version":"1.0","canonical_sha256":"dd710494e19cfa5f7ecadbd6b0f1e17fd08fbdbc75a0ef86014efa7cfc0e9e28","source":{"kind":"arxiv","id":"2507.21671","version":2},"attestation_state":"computed","paper":{"title":"Continuum Reverberation Mapping of Accretion Disks Surrounding Supermassive Black Hole Binaries: Observational Signatures","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.GA","authors_text":"Andjelka B. Kova\\v{c}evi\\'c, Jian-Min Wang, Juan V. Hern\\'andez Santisteban, Keith Horne, Luka \\v{C}. Popovi\\'c, Michael S. Brotherton, Rick Edelson, Roberta Vieliute, Shuo Zhai, Tingting Liu, Yan-Rong Li, Yi-Xin Fu","submitted_at":"2025-07-29T10:28:40Z","abstract_excerpt":"It has remained challenging to reliably identify sub-parsec supermassive black hole binaries (SMBHBs), despite them being expected to be ubiquitous. We propose a new method using multi-band continuum reverberation mapping to identify low-mass-ratio SMBHBs in active galactic nuclei. The basic principle is that, due to the presence of a low-density cavity between the mini-disks and the circumbinary disk, the continuum emissions show a deficit at certain wavelengths, leading to a distinguishing feature in the relation between the inter-band time lag and wavelengths $\\tau(\\lambda)$. Specifically, "},"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":"2507.21671","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2025-07-29T10:28:40Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"8924f8c9880887ae841d7aa5cb6dc8a93e11f3eda01ee357b97816b059e498aa","abstract_canon_sha256":"956eb69fbdaba9fd5ee3c90c90555c22e167382acb4c3cdc8badfb3b4d8f61d8"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T12:03:30.176920Z","signature_b64":"7htKdOM5OFA25BlkHpduynlSH1Cp5duVArpXKg5JivvF7ubKSZDqRBK7owYG0TxYB6ZINJLnnShsxJz41L5MAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"dd710494e19cfa5f7ecadbd6b0f1e17fd08fbdbc75a0ef86014efa7cfc0e9e28","last_reissued_at":"2026-07-05T12:03:30.176508Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T12:03:30.176508Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Continuum Reverberation Mapping of Accretion Disks Surrounding Supermassive Black Hole Binaries: Observational Signatures","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.GA","authors_text":"Andjelka B. Kova\\v{c}evi\\'c, Jian-Min Wang, Juan V. Hern\\'andez Santisteban, Keith Horne, Luka \\v{C}. Popovi\\'c, Michael S. Brotherton, Rick Edelson, Roberta Vieliute, Shuo Zhai, Tingting Liu, Yan-Rong Li, Yi-Xin Fu","submitted_at":"2025-07-29T10:28:40Z","abstract_excerpt":"It has remained challenging to reliably identify sub-parsec supermassive black hole binaries (SMBHBs), despite them being expected to be ubiquitous. We propose a new method using multi-band continuum reverberation mapping to identify low-mass-ratio SMBHBs in active galactic nuclei. The basic principle is that, due to the presence of a low-density cavity between the mini-disks and the circumbinary disk, the continuum emissions show a deficit at certain wavelengths, leading to a distinguishing feature in the relation between the inter-band time lag and wavelengths $\\tau(\\lambda)$. Specifically, "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2507.21671","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2507.21671/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2507.21671","created_at":"2026-07-05T12:03:30.176561+00:00"},{"alias_kind":"arxiv_version","alias_value":"2507.21671v2","created_at":"2026-07-05T12:03:30.176561+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2507.21671","created_at":"2026-07-05T12:03:30.176561+00:00"},{"alias_kind":"pith_short_12","alias_value":"3VYQJFHBTT5F","created_at":"2026-07-05T12:03:30.176561+00:00"},{"alias_kind":"pith_short_16","alias_value":"3VYQJFHBTT5F67WK","created_at":"2026-07-05T12:03:30.176561+00:00"},{"alias_kind":"pith_short_8","alias_value":"3VYQJFHB","created_at":"2026-07-05T12:03:30.176561+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/3VYQJFHBTT5F67WK3PLLB4PBP7","json":"https://pith.science/pith/3VYQJFHBTT5F67WK3PLLB4PBP7.json","graph_json":"https://pith.science/api/pith-number/3VYQJFHBTT5F67WK3PLLB4PBP7/graph.json","events_json":"https://pith.science/api/pith-number/3VYQJFHBTT5F67WK3PLLB4PBP7/events.json","paper":"https://pith.science/paper/3VYQJFHB"},"agent_actions":{"view_html":"https://pith.science/pith/3VYQJFHBTT5F67WK3PLLB4PBP7","download_json":"https://pith.science/pith/3VYQJFHBTT5F67WK3PLLB4PBP7.json","view_paper":"https://pith.science/paper/3VYQJFHB","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2507.21671&json=true","fetch_graph":"https://pith.science/api/pith-number/3VYQJFHBTT5F67WK3PLLB4PBP7/graph.json","fetch_events":"https://pith.science/api/pith-number/3VYQJFHBTT5F67WK3PLLB4PBP7/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/3VYQJFHBTT5F67WK3PLLB4PBP7/action/timestamp_anchor","attest_storage":"https://pith.science/pith/3VYQJFHBTT5F67WK3PLLB4PBP7/action/storage_attestation","attest_author":"https://pith.science/pith/3VYQJFHBTT5F67WK3PLLB4PBP7/action/author_attestation","sign_citation":"https://pith.science/pith/3VYQJFHBTT5F67WK3PLLB4PBP7/action/citation_signature","submit_replication":"https://pith.science/pith/3VYQJFHBTT5F67WK3PLLB4PBP7/action/replication_record"}},"created_at":"2026-07-05T12:03:30.176561+00:00","updated_at":"2026-07-05T12:03:30.176561+00:00"}