{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:BC7GVZTOMDLLYGUAKE6VCEEF6E","short_pith_number":"pith:BC7GVZTO","canonical_record":{"source":{"id":"2110.07465","kind":"arxiv","version":3},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-10-14T15:38:45Z","cross_cats_sorted":[],"title_canon_sha256":"d07264c6187caeae72e92f679d86f34a940c1f764fc3c0af999b6ce0128583d4","abstract_canon_sha256":"5b828938aac1875dc537c3cad1ff133bb655fb5f585b794aa2b14c384455cc73"},"schema_version":"1.0"},"canonical_sha256":"08be6ae66e60d6bc1a80513d511085f12f6a5526fe725bd3bdae81139a39b5c3","source":{"kind":"arxiv","id":"2110.07465","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2110.07465","created_at":"2026-07-05T04:57:00Z"},{"alias_kind":"arxiv_version","alias_value":"2110.07465v3","created_at":"2026-07-05T04:57:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2110.07465","created_at":"2026-07-05T04:57:00Z"},{"alias_kind":"pith_short_12","alias_value":"BC7GVZTOMDLL","created_at":"2026-07-05T04:57:00Z"},{"alias_kind":"pith_short_16","alias_value":"BC7GVZTOMDLLYGUA","created_at":"2026-07-05T04:57:00Z"},{"alias_kind":"pith_short_8","alias_value":"BC7GVZTO","created_at":"2026-07-05T04:57:00Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:BC7GVZTOMDLLYGUAKE6VCEEF6E","target":"record","payload":{"canonical_record":{"source":{"id":"2110.07465","kind":"arxiv","version":3},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-10-14T15:38:45Z","cross_cats_sorted":[],"title_canon_sha256":"d07264c6187caeae72e92f679d86f34a940c1f764fc3c0af999b6ce0128583d4","abstract_canon_sha256":"5b828938aac1875dc537c3cad1ff133bb655fb5f585b794aa2b14c384455cc73"},"schema_version":"1.0"},"canonical_sha256":"08be6ae66e60d6bc1a80513d511085f12f6a5526fe725bd3bdae81139a39b5c3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T04:57:00.582786Z","signature_b64":"wiBRUf2ZRgMDLbzr5iBqIADQNr8RcOQL3EMpIlurrCAyPqw08AkBdi8QSq3tXHZf+t2yxFdVw+jOwBlXRMf2AQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"08be6ae66e60d6bc1a80513d511085f12f6a5526fe725bd3bdae81139a39b5c3","last_reissued_at":"2026-07-05T04:57:00.582297Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T04:57:00.582297Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2110.07465","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":"2026-07-05T04:57:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QOi3+HSZhZPdVBJgrzsKAK/pqQQDggQS45L6fFukmrth09pcEF5Kv6W5i7vc0E29BLlQM4s0x8xgX9NdI7PoAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-01T10:56:15.394072Z"},"content_sha256":"7aa2a19dd8748349a3074e20c896c28d774f40d549fd7312b807d47ff10fa3eb","schema_version":"1.0","event_id":"sha256:7aa2a19dd8748349a3074e20c896c28d774f40d549fd7312b807d47ff10fa3eb"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:BC7GVZTOMDLLYGUAKE6VCEEF6E","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Quasars with Periodic Variability: Capabilities and Limitations of Bayesian Searches for Supermassive Black Hole Binaries in Time-Domain Surveys","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Caitlin A. Witt, Maria Charisi, Sarah Burke-Spolaor, Stephen R. Taylor","submitted_at":"2021-10-14T15:38:45Z","abstract_excerpt":"Supermassive black hole binaries (SMBHBs) are an inevitable consequence of galaxy mergers. At subparsec separations, they are practically impossible to resolve, and the most promising technique is to search for quasars with periodic variability. However, searches for quasar periodicity in time-domain data are challenging due to the stochastic variability of quasars. In this paper, we used Bayesian methods to disentangle periodic SMBHB signals from intrinsic damped random walk (DRW) variability in active galactic nuclei light curves. We simulated a wide variety of realistic DRW and DRW+sine lig"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2110.07465","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/2110.07465/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":"2026-07-05T04:57:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LZDvdqmKOgFnCTBxMx8Z8ZW+uXMZxZzbjItNEWfTLVfWTQobAVP7sBegJMT72siFNq3qQHB7TFo1UiXW/lGuBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-01T10:56:15.394410Z"},"content_sha256":"396d9aa70d769bf060abd7c163fb529e3c1564aec275693ddb1270cf10f8889a","schema_version":"1.0","event_id":"sha256:396d9aa70d769bf060abd7c163fb529e3c1564aec275693ddb1270cf10f8889a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BC7GVZTOMDLLYGUAKE6VCEEF6E/bundle.json","state_url":"https://pith.science/pith/BC7GVZTOMDLLYGUAKE6VCEEF6E/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BC7GVZTOMDLLYGUAKE6VCEEF6E/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":"2026-08-01T10:56:15Z","links":{"resolver":"https://pith.science/pith/BC7GVZTOMDLLYGUAKE6VCEEF6E","bundle":"https://pith.science/pith/BC7GVZTOMDLLYGUAKE6VCEEF6E/bundle.json","state":"https://pith.science/pith/BC7GVZTOMDLLYGUAKE6VCEEF6E/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BC7GVZTOMDLLYGUAKE6VCEEF6E/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:BC7GVZTOMDLLYGUAKE6VCEEF6E","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":"5b828938aac1875dc537c3cad1ff133bb655fb5f585b794aa2b14c384455cc73","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-10-14T15:38:45Z","title_canon_sha256":"d07264c6187caeae72e92f679d86f34a940c1f764fc3c0af999b6ce0128583d4"},"schema_version":"1.0","source":{"id":"2110.07465","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2110.07465","created_at":"2026-07-05T04:57:00Z"},{"alias_kind":"arxiv_version","alias_value":"2110.07465v3","created_at":"2026-07-05T04:57:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2110.07465","created_at":"2026-07-05T04:57:00Z"},{"alias_kind":"pith_short_12","alias_value":"BC7GVZTOMDLL","created_at":"2026-07-05T04:57:00Z"},{"alias_kind":"pith_short_16","alias_value":"BC7GVZTOMDLLYGUA","created_at":"2026-07-05T04:57:00Z"},{"alias_kind":"pith_short_8","alias_value":"BC7GVZTO","created_at":"2026-07-05T04:57:00Z"}],"graph_snapshots":[{"event_id":"sha256:396d9aa70d769bf060abd7c163fb529e3c1564aec275693ddb1270cf10f8889a","target":"graph","created_at":"2026-07-05T04:57:00Z","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/2110.07465/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Supermassive black hole binaries (SMBHBs) are an inevitable consequence of galaxy mergers. At subparsec separations, they are practically impossible to resolve, and the most promising technique is to search for quasars with periodic variability. However, searches for quasar periodicity in time-domain data are challenging due to the stochastic variability of quasars. In this paper, we used Bayesian methods to disentangle periodic SMBHB signals from intrinsic damped random walk (DRW) variability in active galactic nuclei light curves. We simulated a wide variety of realistic DRW and DRW+sine lig","authors_text":"Caitlin A. Witt, Maria Charisi, Sarah Burke-Spolaor, Stephen R. Taylor","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-10-14T15:38:45Z","title":"Quasars with Periodic Variability: Capabilities and Limitations of Bayesian Searches for Supermassive Black Hole Binaries in Time-Domain Surveys"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2110.07465","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":"sha256:7aa2a19dd8748349a3074e20c896c28d774f40d549fd7312b807d47ff10fa3eb","target":"record","created_at":"2026-07-05T04:57:00Z","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":"5b828938aac1875dc537c3cad1ff133bb655fb5f585b794aa2b14c384455cc73","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2021-10-14T15:38:45Z","title_canon_sha256":"d07264c6187caeae72e92f679d86f34a940c1f764fc3c0af999b6ce0128583d4"},"schema_version":"1.0","source":{"id":"2110.07465","kind":"arxiv","version":3}},"canonical_sha256":"08be6ae66e60d6bc1a80513d511085f12f6a5526fe725bd3bdae81139a39b5c3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"08be6ae66e60d6bc1a80513d511085f12f6a5526fe725bd3bdae81139a39b5c3","first_computed_at":"2026-07-05T04:57:00.582297Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:57:00.582297Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"wiBRUf2ZRgMDLbzr5iBqIADQNr8RcOQL3EMpIlurrCAyPqw08AkBdi8QSq3tXHZf+t2yxFdVw+jOwBlXRMf2AQ==","signature_status":"signed_v1","signed_at":"2026-07-05T04:57:00.582786Z","signed_message":"canonical_sha256_bytes"},"source_id":"2110.07465","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7aa2a19dd8748349a3074e20c896c28d774f40d549fd7312b807d47ff10fa3eb","sha256:396d9aa70d769bf060abd7c163fb529e3c1564aec275693ddb1270cf10f8889a"],"state_sha256":"9f3dbc5888de66118cfa7330afb83b8f2976edc032dba2d0ca1e3814923eb008"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FpQv93EyEvhNzRQ0FkYVcEM0QKUeCaJAJ1CvYdkwQ6DfTvKzG15yKlyign3887d4ObRKDI0Fenp0vAShIHPSBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-01T10:56:15.399027Z","bundle_sha256":"954a1e0ada16384f11f543758fca83dca364c5fb9e2ad7a26536c1b3342eeb12"}}