{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2022:Q3M2ZOZW62LCC63XMBWX5USNVY","short_pith_number":"pith:Q3M2ZOZW","canonical_record":{"source":{"id":"2210.13489","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2022-10-24T18:00:04Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"dcf310117b31944cc2d889d6733476644124e4292798c651358b489a46dbc802","abstract_canon_sha256":"d955d821ec3412120fc877fb6031098800f7701cb2d49fda06ffb1ff0643d13d"},"schema_version":"1.0"},"canonical_sha256":"86d9acbb36f696217b77606d7ed24dae34f718a272c6745a53edc449f82cac3b","source":{"kind":"arxiv","id":"2210.13489","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2210.13489","created_at":"2026-07-05T06:38:29Z"},{"alias_kind":"arxiv_version","alias_value":"2210.13489v1","created_at":"2026-07-05T06:38:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2210.13489","created_at":"2026-07-05T06:38:29Z"},{"alias_kind":"pith_short_12","alias_value":"Q3M2ZOZW62LC","created_at":"2026-07-05T06:38:29Z"},{"alias_kind":"pith_short_16","alias_value":"Q3M2ZOZW62LCC63X","created_at":"2026-07-05T06:38:29Z"},{"alias_kind":"pith_short_8","alias_value":"Q3M2ZOZW","created_at":"2026-07-05T06:38:29Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2022:Q3M2ZOZW62LCC63XMBWX5USNVY","target":"record","payload":{"canonical_record":{"source":{"id":"2210.13489","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2022-10-24T18:00:04Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"dcf310117b31944cc2d889d6733476644124e4292798c651358b489a46dbc802","abstract_canon_sha256":"d955d821ec3412120fc877fb6031098800f7701cb2d49fda06ffb1ff0643d13d"},"schema_version":"1.0"},"canonical_sha256":"86d9acbb36f696217b77606d7ed24dae34f718a272c6745a53edc449f82cac3b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T06:38:29.387433Z","signature_b64":"RYZKkacIymvE2yzZArcVGLsQbYl317oeytFqIYfABhJLRNAPpqUeQk36CNWpox6WQJxIv3YwxhpCGu5WpuYPAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"86d9acbb36f696217b77606d7ed24dae34f718a272c6745a53edc449f82cac3b","last_reissued_at":"2026-07-05T06:38:29.386925Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T06:38:29.386925Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2210.13489","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T06:38:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wct3KI6i2W78YqjPfQMmChI/J3MPM+FE1dhV0TxfQj1k0o2nxIrCiBMnkbvUP1vDD9DIBh0rm4a+uAhFhvauAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T19:03:42.018595Z"},"content_sha256":"17f6163f0c27f06405260912aac61b0e0ca1126f0a324eedb1cf383b411644c1","schema_version":"1.0","event_id":"sha256:17f6163f0c27f06405260912aac61b0e0ca1126f0a324eedb1cf383b411644c1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2022:Q3M2ZOZW62LCC63XMBWX5USNVY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Negative Long Lag from the Optical to the UV Continuum in Fairall 9","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.GA","authors_text":"Amy Secunda, Ashley Villar, Jenny E. Greene, Philippe Z. Yao, Yan-Fei Jiang","submitted_at":"2022-10-24T18:00:04Z","abstract_excerpt":"We report the detection of a long-timescale negative lag, where the blue bands lag the red bands, in the nearby Seyfert 1 galaxy Fairall 9. Active Galactic Nuclei (AGN) light curves show variability over a wide range of timescales. By measuring time lags between different wavelengths, the otherwise inaccessible structure and kinematics of the accretion disk can be studied. One common approach, reverberation mapping, quantifies the continuum and line lags moving outwards through the disk at the light-travel time, revealing the size and temperature profile of the disk. Inspired by numerical simu"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2210.13489","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2210.13489/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":"2026-07-05T06:38:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jk5g0EvNxNHdzov998pYd1Q/A/wTBisYmm69cNAn+mIlpInKvnzVcNUKEFWG4pvtYjGB/6maqJXXKv2bWGC2Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T19:03:42.019147Z"},"content_sha256":"abed5a553382176df4dc99ec1fb269617c058953eb5c6d971ad0cbf5ec213709","schema_version":"1.0","event_id":"sha256:abed5a553382176df4dc99ec1fb269617c058953eb5c6d971ad0cbf5ec213709"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/Q3M2ZOZW62LCC63XMBWX5USNVY/bundle.json","state_url":"https://pith.science/pith/Q3M2ZOZW62LCC63XMBWX5USNVY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/Q3M2ZOZW62LCC63XMBWX5USNVY/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":"2026-08-03T19:03:42Z","links":{"resolver":"https://pith.science/pith/Q3M2ZOZW62LCC63XMBWX5USNVY","bundle":"https://pith.science/pith/Q3M2ZOZW62LCC63XMBWX5USNVY/bundle.json","state":"https://pith.science/pith/Q3M2ZOZW62LCC63XMBWX5USNVY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/Q3M2ZOZW62LCC63XMBWX5USNVY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:Q3M2ZOZW62LCC63XMBWX5USNVY","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":"d955d821ec3412120fc877fb6031098800f7701cb2d49fda06ffb1ff0643d13d","cross_cats_sorted":["astro-ph.HE"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2022-10-24T18:00:04Z","title_canon_sha256":"dcf310117b31944cc2d889d6733476644124e4292798c651358b489a46dbc802"},"schema_version":"1.0","source":{"id":"2210.13489","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2210.13489","created_at":"2026-07-05T06:38:29Z"},{"alias_kind":"arxiv_version","alias_value":"2210.13489v1","created_at":"2026-07-05T06:38:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2210.13489","created_at":"2026-07-05T06:38:29Z"},{"alias_kind":"pith_short_12","alias_value":"Q3M2ZOZW62LC","created_at":"2026-07-05T06:38:29Z"},{"alias_kind":"pith_short_16","alias_value":"Q3M2ZOZW62LCC63X","created_at":"2026-07-05T06:38:29Z"},{"alias_kind":"pith_short_8","alias_value":"Q3M2ZOZW","created_at":"2026-07-05T06:38:29Z"}],"graph_snapshots":[{"event_id":"sha256:abed5a553382176df4dc99ec1fb269617c058953eb5c6d971ad0cbf5ec213709","target":"graph","created_at":"2026-07-05T06:38:29Z","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/2210.13489/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We report the detection of a long-timescale negative lag, where the blue bands lag the red bands, in the nearby Seyfert 1 galaxy Fairall 9. Active Galactic Nuclei (AGN) light curves show variability over a wide range of timescales. By measuring time lags between different wavelengths, the otherwise inaccessible structure and kinematics of the accretion disk can be studied. One common approach, reverberation mapping, quantifies the continuum and line lags moving outwards through the disk at the light-travel time, revealing the size and temperature profile of the disk. Inspired by numerical simu","authors_text":"Amy Secunda, Ashley Villar, Jenny E. Greene, Philippe Z. Yao, Yan-Fei Jiang","cross_cats":["astro-ph.HE"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2022-10-24T18:00:04Z","title":"A Negative Long Lag from the Optical to the UV Continuum in Fairall 9"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2210.13489","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":"sha256:17f6163f0c27f06405260912aac61b0e0ca1126f0a324eedb1cf383b411644c1","target":"record","created_at":"2026-07-05T06:38:29Z","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":"d955d821ec3412120fc877fb6031098800f7701cb2d49fda06ffb1ff0643d13d","cross_cats_sorted":["astro-ph.HE"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2022-10-24T18:00:04Z","title_canon_sha256":"dcf310117b31944cc2d889d6733476644124e4292798c651358b489a46dbc802"},"schema_version":"1.0","source":{"id":"2210.13489","kind":"arxiv","version":1}},"canonical_sha256":"86d9acbb36f696217b77606d7ed24dae34f718a272c6745a53edc449f82cac3b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"86d9acbb36f696217b77606d7ed24dae34f718a272c6745a53edc449f82cac3b","first_computed_at":"2026-07-05T06:38:29.386925Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T06:38:29.386925Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"RYZKkacIymvE2yzZArcVGLsQbYl317oeytFqIYfABhJLRNAPpqUeQk36CNWpox6WQJxIv3YwxhpCGu5WpuYPAg==","signature_status":"signed_v1","signed_at":"2026-07-05T06:38:29.387433Z","signed_message":"canonical_sha256_bytes"},"source_id":"2210.13489","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:17f6163f0c27f06405260912aac61b0e0ca1126f0a324eedb1cf383b411644c1","sha256:abed5a553382176df4dc99ec1fb269617c058953eb5c6d971ad0cbf5ec213709"],"state_sha256":"7b8b151f9cdc45742d87dc504a6a024ec3e4105b608da32c24077b639fbbc5ea"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"reyX20vilC/676r+0po0jrNIbAkPj9l9uxa5dmD1ngvQ7zFiRB50qqHLXyzJHsrtt39RdO8JMJYWZAb6xqtdAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-03T19:03:42.022788Z","bundle_sha256":"7f2fcc8704a851edc96db640be276b9717d429beea5f51ee7570186f4cde9165"}}