{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:FOIPWGU3ZAADESB2SNUXAQYGXM","short_pith_number":"pith:FOIPWGU3","canonical_record":{"source":{"id":"2506.06731","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2025-06-07T09:34:35Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"20405e21de68628ffc57b48946515a6ec35b3ead80493b273ee51bbee36dae2d","abstract_canon_sha256":"1da1cc98989862f1a41fcf8fb933f7a39904ab46f0156c3b46663f0094e560e8"},"schema_version":"1.0"},"canonical_sha256":"2b90fb1a9bc80032483a9369704306bb107a208433e2e76a7640d1337511139d","source":{"kind":"arxiv","id":"2506.06731","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2506.06731","created_at":"2026-07-05T11:17:54Z"},{"alias_kind":"arxiv_version","alias_value":"2506.06731v1","created_at":"2026-07-05T11:17:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2506.06731","created_at":"2026-07-05T11:17:54Z"},{"alias_kind":"pith_short_12","alias_value":"FOIPWGU3ZAAD","created_at":"2026-07-05T11:17:54Z"},{"alias_kind":"pith_short_16","alias_value":"FOIPWGU3ZAADESB2","created_at":"2026-07-05T11:17:54Z"},{"alias_kind":"pith_short_8","alias_value":"FOIPWGU3","created_at":"2026-07-05T11:17:54Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:FOIPWGU3ZAADESB2SNUXAQYGXM","target":"record","payload":{"canonical_record":{"source":{"id":"2506.06731","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2025-06-07T09:34:35Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"20405e21de68628ffc57b48946515a6ec35b3ead80493b273ee51bbee36dae2d","abstract_canon_sha256":"1da1cc98989862f1a41fcf8fb933f7a39904ab46f0156c3b46663f0094e560e8"},"schema_version":"1.0"},"canonical_sha256":"2b90fb1a9bc80032483a9369704306bb107a208433e2e76a7640d1337511139d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:17:54.811540Z","signature_b64":"nNzP0EP78cCqCfJYWs9NYtJ33x+rpEPe4EWscBkVG3/H0oKBbQrvbDRPdLkrgWqQLjU2etSlszudViTFgf8aDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2b90fb1a9bc80032483a9369704306bb107a208433e2e76a7640d1337511139d","last_reissued_at":"2026-07-05T11:17:54.811081Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:17:54.811081Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2506.06731","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":"2026-07-05T11:17:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"28AjmWkOoWNvfaof8MQmTDWqp1Mmy1V7ujh/GGanSkTW6Y5gGEMQK4pPhW2taohCcN4sht8CLdFHXcprCdRuBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T12:35:40.249565Z"},"content_sha256":"8dadc0bc677f3e9381609e7dd9d350ac533aa9c702fe973094d114955a98285f","schema_version":"1.0","event_id":"sha256:8dadc0bc677f3e9381609e7dd9d350ac533aa9c702fe973094d114955a98285f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:FOIPWGU3ZAADESB2SNUXAQYGXM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Echo mapping of the black hole accretion flow in NGC 7469","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.GA","authors_text":"A.J. Barth, C.A. Onken, C. Villforth, D. Chelouche, D. H. Gonzalez-Buitrago, E. Kara, E. M. Cackett, E. Romero Colmenero, F.R. Donnan, H. Landt, H. Winkler, Ian McHardy, J. Gelbord, Juan V. Hern\\'andez Santisteban, Keith Horne, M.R. Goad, M. Vestergaard, P. Lira, Raj Prince, R. Edelson, S. Kaspi, S. Valenti, T. Treu","submitted_at":"2025-06-07T09:34:35Z","abstract_excerpt":"Reverberation mapping (RM) can measure black hole accretion disc sizes and radial structure through observed time lags that should increase with wavelength as $\\tau\\propto\\lambda^{4/3}$. Our 250-day RM campaign on NGC 7469 combines sub-day cadence 7-band photometry from the Las Cumbres Observatory robotic telescopes and weekly X-ray and UVOT data from Swift. By fitting these light curves, we measure the spectral energy distribution of the variable accretion disc and inter-band lags of just 1.5 days across the UV to the optical range. The disc SED is close to the expected $f_\\nu\\propto\\nu^{1/3}"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2506.06731","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/2506.06731/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":"2026-07-05T11:17:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2Vw8peJPxh7VQ0ngslNaFUu/omrQRwPPM1oRX1dOp+ZFzsDZK46UhkS12t5U5ZGzrSuUp4B1bHvcvR2+j5rcCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T12:35:40.250082Z"},"content_sha256":"10a2170a529d5e652656c160f1785d93e56fbf04bf960495c733cab919004bea","schema_version":"1.0","event_id":"sha256:10a2170a529d5e652656c160f1785d93e56fbf04bf960495c733cab919004bea"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FOIPWGU3ZAADESB2SNUXAQYGXM/bundle.json","state_url":"https://pith.science/pith/FOIPWGU3ZAADESB2SNUXAQYGXM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FOIPWGU3ZAADESB2SNUXAQYGXM/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":"2026-08-07T12:35:40Z","links":{"resolver":"https://pith.science/pith/FOIPWGU3ZAADESB2SNUXAQYGXM","bundle":"https://pith.science/pith/FOIPWGU3ZAADESB2SNUXAQYGXM/bundle.json","state":"https://pith.science/pith/FOIPWGU3ZAADESB2SNUXAQYGXM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FOIPWGU3ZAADESB2SNUXAQYGXM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:FOIPWGU3ZAADESB2SNUXAQYGXM","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":"1da1cc98989862f1a41fcf8fb933f7a39904ab46f0156c3b46663f0094e560e8","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2025-06-07T09:34:35Z","title_canon_sha256":"20405e21de68628ffc57b48946515a6ec35b3ead80493b273ee51bbee36dae2d"},"schema_version":"1.0","source":{"id":"2506.06731","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2506.06731","created_at":"2026-07-05T11:17:54Z"},{"alias_kind":"arxiv_version","alias_value":"2506.06731v1","created_at":"2026-07-05T11:17:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2506.06731","created_at":"2026-07-05T11:17:54Z"},{"alias_kind":"pith_short_12","alias_value":"FOIPWGU3ZAAD","created_at":"2026-07-05T11:17:54Z"},{"alias_kind":"pith_short_16","alias_value":"FOIPWGU3ZAADESB2","created_at":"2026-07-05T11:17:54Z"},{"alias_kind":"pith_short_8","alias_value":"FOIPWGU3","created_at":"2026-07-05T11:17:54Z"}],"graph_snapshots":[{"event_id":"sha256:10a2170a529d5e652656c160f1785d93e56fbf04bf960495c733cab919004bea","target":"graph","created_at":"2026-07-05T11:17:54Z","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/2506.06731/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Reverberation mapping (RM) can measure black hole accretion disc sizes and radial structure through observed time lags that should increase with wavelength as $\\tau\\propto\\lambda^{4/3}$. Our 250-day RM campaign on NGC 7469 combines sub-day cadence 7-band photometry from the Las Cumbres Observatory robotic telescopes and weekly X-ray and UVOT data from Swift. By fitting these light curves, we measure the spectral energy distribution of the variable accretion disc and inter-band lags of just 1.5 days across the UV to the optical range. The disc SED is close to the expected $f_\\nu\\propto\\nu^{1/3}","authors_text":"A.J. Barth, C.A. Onken, C. Villforth, D. Chelouche, D. H. Gonzalez-Buitrago, E. Kara, E. M. Cackett, E. Romero Colmenero, F.R. Donnan, H. Landt, H. Winkler, Ian McHardy, J. Gelbord, Juan V. Hern\\'andez Santisteban, Keith Horne, M.R. Goad, M. Vestergaard, P. Lira, Raj Prince, R. Edelson, S. Kaspi, S. Valenti, T. Treu","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2025-06-07T09:34:35Z","title":"Echo mapping of the black hole accretion flow in NGC 7469"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2506.06731","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":"sha256:8dadc0bc677f3e9381609e7dd9d350ac533aa9c702fe973094d114955a98285f","target":"record","created_at":"2026-07-05T11:17:54Z","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":"1da1cc98989862f1a41fcf8fb933f7a39904ab46f0156c3b46663f0094e560e8","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2025-06-07T09:34:35Z","title_canon_sha256":"20405e21de68628ffc57b48946515a6ec35b3ead80493b273ee51bbee36dae2d"},"schema_version":"1.0","source":{"id":"2506.06731","kind":"arxiv","version":1}},"canonical_sha256":"2b90fb1a9bc80032483a9369704306bb107a208433e2e76a7640d1337511139d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2b90fb1a9bc80032483a9369704306bb107a208433e2e76a7640d1337511139d","first_computed_at":"2026-07-05T11:17:54.811081Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:17:54.811081Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"nNzP0EP78cCqCfJYWs9NYtJ33x+rpEPe4EWscBkVG3/H0oKBbQrvbDRPdLkrgWqQLjU2etSlszudViTFgf8aDg==","signature_status":"signed_v1","signed_at":"2026-07-05T11:17:54.811540Z","signed_message":"canonical_sha256_bytes"},"source_id":"2506.06731","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8dadc0bc677f3e9381609e7dd9d350ac533aa9c702fe973094d114955a98285f","sha256:10a2170a529d5e652656c160f1785d93e56fbf04bf960495c733cab919004bea"],"state_sha256":"9490ba61cd94658c29476e84cd4e69a7cccb815a3d3a023f019d36c6ca58fed4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0ZYUDoX1C0xBxa+lCo9T6KjVVzmkqeSI/xJrREqvcDFNHIyDuCjnhA4Ahnkzpk0x0xTq+KDLPrRmC+ST9UUlDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-07T12:35:40.254208Z","bundle_sha256":"f9dcc666a90968cbb22559626eece305aaea149c0c971c6e655b8a94b0734dc3"}}