{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:UH5VFYCWWOYGA5JMVLW764BMJK","short_pith_number":"pith:UH5VFYCW","canonical_record":{"source":{"id":"2405.00894","kind":"arxiv","version":3},"metadata":{"license":"http://creativecommons.org/licenses/by-sa/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2024-05-01T22:46:34Z","cross_cats_sorted":[],"title_canon_sha256":"852ee5e1e5c7148c5c974280990587555a6f94f6795d7760ecf0f6c01d2387a9","abstract_canon_sha256":"3f7c1e1c96d23bf682f16ded86ff40275bd732d1ec6c5d16b57a9b3b12f03ebd"},"schema_version":"1.0"},"canonical_sha256":"a1fb52e056b3b060752caaedff702c4a85c0263a099452f3f71794858afa71c7","source":{"kind":"arxiv","id":"2405.00894","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2405.00894","created_at":"2026-07-05T08:49:33Z"},{"alias_kind":"arxiv_version","alias_value":"2405.00894v3","created_at":"2026-07-05T08:49:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2405.00894","created_at":"2026-07-05T08:49:33Z"},{"alias_kind":"pith_short_12","alias_value":"UH5VFYCWWOYG","created_at":"2026-07-05T08:49:33Z"},{"alias_kind":"pith_short_16","alias_value":"UH5VFYCWWOYGA5JM","created_at":"2026-07-05T08:49:33Z"},{"alias_kind":"pith_short_8","alias_value":"UH5VFYCW","created_at":"2026-07-05T08:49:33Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:UH5VFYCWWOYGA5JMVLW764BMJK","target":"record","payload":{"canonical_record":{"source":{"id":"2405.00894","kind":"arxiv","version":3},"metadata":{"license":"http://creativecommons.org/licenses/by-sa/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2024-05-01T22:46:34Z","cross_cats_sorted":[],"title_canon_sha256":"852ee5e1e5c7148c5c974280990587555a6f94f6795d7760ecf0f6c01d2387a9","abstract_canon_sha256":"3f7c1e1c96d23bf682f16ded86ff40275bd732d1ec6c5d16b57a9b3b12f03ebd"},"schema_version":"1.0"},"canonical_sha256":"a1fb52e056b3b060752caaedff702c4a85c0263a099452f3f71794858afa71c7","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T08:49:33.864832Z","signature_b64":"Wlx84ms0yHiNmBvrBPa4OdSOD6cW+0MD77OXduadxVr1FhibTqDH+xORvsU6SLWjy3cun01wTFWI/Mw1GjfrBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a1fb52e056b3b060752caaedff702c4a85c0263a099452f3f71794858afa71c7","last_reissued_at":"2026-07-05T08:49:33.864402Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T08:49:33.864402Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2405.00894","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T08:49:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BtHdd93DJk9ajHc6e8Fu4TqfDY99uzdP+r1DM2W7Ahy89atDfcH76+KaAV2X3M3B56zkEns3340yupj+GfJgCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T17:45:52.544039Z"},"content_sha256":"73f5d84d679a2bc05f0050b6d9b4a810bab551d2b29ff3a3ddd3cc59f403901e","schema_version":"1.0","event_id":"sha256:73f5d84d679a2bc05f0050b6d9b4a810bab551d2b29ff3a3ddd3cc59f403901e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:UH5VFYCWWOYGA5JMVLW764BMJK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"AT2018fyk: Candidate Tidal Disruption Event by a (Super)massive Black Hole Binary","license":"http://creativecommons.org/licenses/by-sa/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"A.I. Zabludoff, A.J. Levan, C. Lewin, D. Li, D.R. Pasham, E. Kara, N.C. Stone, P.G. Jonker, S. Wen, T. Wevers, Z. Cao","submitted_at":"2024-05-01T22:46:34Z","abstract_excerpt":"The tidal disruption event (TDE) AT2018fyk has unusual X-ray, UV, and optical light curves that decay over the first $\\sim$600d, rebrighten, and decay again around 1200d. We explain this behavior as a one-off TDE associated with a massive black hole (BH) \\emph{binary}. The sharp drop-offs from $t^{-5/3}$ power laws at around 600d naturally arise when one BH interrupts the debris fallback onto the other BH. The BH mass $M_\\bullet$ derived from fitting X-ray spectra with a slim disk accretion model and, independently, from fitting the early UV/optical light curves, is smaller by two orders of ma"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2405.00894","kind":"arxiv","version":3},"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/2405.00894/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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T08:49:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EE6bAFkT2rR7fZjjIwZhqIH+s1V9GkrQ91QDb1xWtHKhf/BFVfLsbOVwfpB77p3dQS4L4mtmRg12veEKDmHeCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T17:45:52.544597Z"},"content_sha256":"e624438be7f349a5d3e1ddce1dcd37892e19b410c26c2a894558e454d45ce8ec","schema_version":"1.0","event_id":"sha256:e624438be7f349a5d3e1ddce1dcd37892e19b410c26c2a894558e454d45ce8ec"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UH5VFYCWWOYGA5JMVLW764BMJK/bundle.json","state_url":"https://pith.science/pith/UH5VFYCWWOYGA5JMVLW764BMJK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UH5VFYCWWOYGA5JMVLW764BMJK/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-08-10T17:45:52Z","links":{"resolver":"https://pith.science/pith/UH5VFYCWWOYGA5JMVLW764BMJK","bundle":"https://pith.science/pith/UH5VFYCWWOYGA5JMVLW764BMJK/bundle.json","state":"https://pith.science/pith/UH5VFYCWWOYGA5JMVLW764BMJK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UH5VFYCWWOYGA5JMVLW764BMJK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:UH5VFYCWWOYGA5JMVLW764BMJK","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":"3f7c1e1c96d23bf682f16ded86ff40275bd732d1ec6c5d16b57a9b3b12f03ebd","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-sa/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2024-05-01T22:46:34Z","title_canon_sha256":"852ee5e1e5c7148c5c974280990587555a6f94f6795d7760ecf0f6c01d2387a9"},"schema_version":"1.0","source":{"id":"2405.00894","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2405.00894","created_at":"2026-07-05T08:49:33Z"},{"alias_kind":"arxiv_version","alias_value":"2405.00894v3","created_at":"2026-07-05T08:49:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2405.00894","created_at":"2026-07-05T08:49:33Z"},{"alias_kind":"pith_short_12","alias_value":"UH5VFYCWWOYG","created_at":"2026-07-05T08:49:33Z"},{"alias_kind":"pith_short_16","alias_value":"UH5VFYCWWOYGA5JM","created_at":"2026-07-05T08:49:33Z"},{"alias_kind":"pith_short_8","alias_value":"UH5VFYCW","created_at":"2026-07-05T08:49:33Z"}],"graph_snapshots":[{"event_id":"sha256:e624438be7f349a5d3e1ddce1dcd37892e19b410c26c2a894558e454d45ce8ec","target":"graph","created_at":"2026-07-05T08:49:33Z","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/2405.00894/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The tidal disruption event (TDE) AT2018fyk has unusual X-ray, UV, and optical light curves that decay over the first $\\sim$600d, rebrighten, and decay again around 1200d. We explain this behavior as a one-off TDE associated with a massive black hole (BH) \\emph{binary}. The sharp drop-offs from $t^{-5/3}$ power laws at around 600d naturally arise when one BH interrupts the debris fallback onto the other BH. The BH mass $M_\\bullet$ derived from fitting X-ray spectra with a slim disk accretion model and, independently, from fitting the early UV/optical light curves, is smaller by two orders of ma","authors_text":"A.I. Zabludoff, A.J. Levan, C. Lewin, D. Li, D.R. Pasham, E. Kara, N.C. Stone, P.G. Jonker, S. Wen, T. Wevers, Z. Cao","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by-sa/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2024-05-01T22:46:34Z","title":"AT2018fyk: Candidate Tidal Disruption Event by a (Super)massive Black Hole Binary"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2405.00894","kind":"arxiv","version":3},"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":"sha256:73f5d84d679a2bc05f0050b6d9b4a810bab551d2b29ff3a3ddd3cc59f403901e","target":"record","created_at":"2026-07-05T08:49:33Z","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":"3f7c1e1c96d23bf682f16ded86ff40275bd732d1ec6c5d16b57a9b3b12f03ebd","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-sa/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2024-05-01T22:46:34Z","title_canon_sha256":"852ee5e1e5c7148c5c974280990587555a6f94f6795d7760ecf0f6c01d2387a9"},"schema_version":"1.0","source":{"id":"2405.00894","kind":"arxiv","version":3}},"canonical_sha256":"a1fb52e056b3b060752caaedff702c4a85c0263a099452f3f71794858afa71c7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a1fb52e056b3b060752caaedff702c4a85c0263a099452f3f71794858afa71c7","first_computed_at":"2026-07-05T08:49:33.864402Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T08:49:33.864402Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Wlx84ms0yHiNmBvrBPa4OdSOD6cW+0MD77OXduadxVr1FhibTqDH+xORvsU6SLWjy3cun01wTFWI/Mw1GjfrBA==","signature_status":"signed_v1","signed_at":"2026-07-05T08:49:33.864832Z","signed_message":"canonical_sha256_bytes"},"source_id":"2405.00894","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:73f5d84d679a2bc05f0050b6d9b4a810bab551d2b29ff3a3ddd3cc59f403901e","sha256:e624438be7f349a5d3e1ddce1dcd37892e19b410c26c2a894558e454d45ce8ec"],"state_sha256":"e645c70d44fca029341a00d1a37988f88b5741a4ec7aff4004a36d389696a7b3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UeRn4Smq2X4QnOpgaKIXhj9MWWzAxkUj8bU0kVqxrR10HMOa8rRmlsB3FbHLY1TR+4jEPy1Jnb1DWWzOmNVkAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-10T17:45:52.548816Z","bundle_sha256":"8825950c41c03687cc3863db3cfb0a343afda1815e2e4d2302c068249ee7db92"}}