{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:CHAWZ7QR7HTWFDDA43FZY6J4B7","short_pith_number":"pith:CHAWZ7QR","canonical_record":{"source":{"id":"1208.5898","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-08-29T12:41:01Z","cross_cats_sorted":[],"title_canon_sha256":"ba07fcceb0877c89528af7884284dc8a4d4626cd591dfceaa75efcdee0c00630","abstract_canon_sha256":"0cbc182bf073de5f6501e58dbae44294f978e6b6f92942abdb67ec69ceda792c"},"schema_version":"1.0"},"canonical_sha256":"11c16cfe11f9e7628c60e6cb9c793c0ffad84d1a7e34b15ffda8c2794fb85eb3","source":{"kind":"arxiv","id":"1208.5898","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1208.5898","created_at":"2026-05-18T01:54:50Z"},{"alias_kind":"arxiv_version","alias_value":"1208.5898v1","created_at":"2026-05-18T01:54:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1208.5898","created_at":"2026-05-18T01:54:50Z"},{"alias_kind":"pith_short_12","alias_value":"CHAWZ7QR7HTW","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_16","alias_value":"CHAWZ7QR7HTWFDDA","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_8","alias_value":"CHAWZ7QR","created_at":"2026-05-18T12:27:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:CHAWZ7QR7HTWFDDA43FZY6J4B7","target":"record","payload":{"canonical_record":{"source":{"id":"1208.5898","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-08-29T12:41:01Z","cross_cats_sorted":[],"title_canon_sha256":"ba07fcceb0877c89528af7884284dc8a4d4626cd591dfceaa75efcdee0c00630","abstract_canon_sha256":"0cbc182bf073de5f6501e58dbae44294f978e6b6f92942abdb67ec69ceda792c"},"schema_version":"1.0"},"canonical_sha256":"11c16cfe11f9e7628c60e6cb9c793c0ffad84d1a7e34b15ffda8c2794fb85eb3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:54:50.384382Z","signature_b64":"xnY5nlO3DcS5L/cVTLqdCuhWUdYz5n2tNGV648bbCqTLEVj2pm6rbq1BNnQlP/gL+P3L1ez/oUc8zk+zyEbUDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"11c16cfe11f9e7628c60e6cb9c793c0ffad84d1a7e34b15ffda8c2794fb85eb3","last_reissued_at":"2026-05-18T01:54:50.383695Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:54:50.383695Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1208.5898","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":"2026-05-18T01:54:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"scJ/8ISEfw947jxtseRCoXtpmLHS1rvgsp2C9iC5hlrIy14GQbhLorKdrdN7hYSNTqCPbVcB3wO3+o8wvWL6CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T20:37:29.231622Z"},"content_sha256":"005314e4c9ffd7b829eaa012891cd74ff3767848cc568a063b706b3025ece8ce","schema_version":"1.0","event_id":"sha256:005314e4c9ffd7b829eaa012891cd74ff3767848cc568a063b706b3025ece8ce"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:CHAWZ7QR7HTWFDDA43FZY6J4B7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Long XMM observation of the Narrow-Line Seyfert 1 galaxy IRAS13224-3809: rapid variability, high spin and a soft lag","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"A. C. Fabian, A. J. Young, A. Zoghbi, C. S. Reynolds, C.-Y. Chiang, D. J. Walton, D. R. Wilkins, E. Kara, E. M. Cackett, E. Nardini, G. Miniutti, G. Ponti, J. Malzac, J. M. Miller, J. Steiner, K. Lozanov, L. C. Gallo, P. Uttley, R. C. Reis, R. R. Ross, T. Boller, T. Dwelly, W. N. Brandt, Y. Tanaka","submitted_at":"2012-08-29T12:41:01Z","abstract_excerpt":"Results are presented from a 500ks long XMM-Newton observation of the Narrow-Line Seyfert 1 galaxy IRAS13224-3809. The source is rapidly variable on timescales down to a few 100s. The spectrum shows strong broad Fe-K and L emission features which are interpreted as arising from reflection from the inner parts of an accretion disc around a rapidly spinning black hole. Assuming a power-law emissivity for the reflected flux and that the innermost radius corresponds to the innermost stable circular orbit, the black hole spin is measured to be 0.988 with a statistical precision better than one per "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1208.5898","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":""},"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":"2026-05-18T01:54:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Bf+hHxuHS5YfkRrlCrHG6Q2nDoNCge6mYEjPg0/bYdxAHoHirOOeDzjYLaK9cLAtlmVZUVag7mpYFvrabJAiCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T20:37:29.232294Z"},"content_sha256":"a3f45de30191c1c3de2fcb8e38aa3c6836264c6d358671245f03c4f134acfeb0","schema_version":"1.0","event_id":"sha256:a3f45de30191c1c3de2fcb8e38aa3c6836264c6d358671245f03c4f134acfeb0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CHAWZ7QR7HTWFDDA43FZY6J4B7/bundle.json","state_url":"https://pith.science/pith/CHAWZ7QR7HTWFDDA43FZY6J4B7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CHAWZ7QR7HTWFDDA43FZY6J4B7/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":"2026-05-26T20:37:29Z","links":{"resolver":"https://pith.science/pith/CHAWZ7QR7HTWFDDA43FZY6J4B7","bundle":"https://pith.science/pith/CHAWZ7QR7HTWFDDA43FZY6J4B7/bundle.json","state":"https://pith.science/pith/CHAWZ7QR7HTWFDDA43FZY6J4B7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CHAWZ7QR7HTWFDDA43FZY6J4B7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:CHAWZ7QR7HTWFDDA43FZY6J4B7","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":"0cbc182bf073de5f6501e58dbae44294f978e6b6f92942abdb67ec69ceda792c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-08-29T12:41:01Z","title_canon_sha256":"ba07fcceb0877c89528af7884284dc8a4d4626cd591dfceaa75efcdee0c00630"},"schema_version":"1.0","source":{"id":"1208.5898","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1208.5898","created_at":"2026-05-18T01:54:50Z"},{"alias_kind":"arxiv_version","alias_value":"1208.5898v1","created_at":"2026-05-18T01:54:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1208.5898","created_at":"2026-05-18T01:54:50Z"},{"alias_kind":"pith_short_12","alias_value":"CHAWZ7QR7HTW","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_16","alias_value":"CHAWZ7QR7HTWFDDA","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_8","alias_value":"CHAWZ7QR","created_at":"2026-05-18T12:27:01Z"}],"graph_snapshots":[{"event_id":"sha256:a3f45de30191c1c3de2fcb8e38aa3c6836264c6d358671245f03c4f134acfeb0","target":"graph","created_at":"2026-05-18T01:54:50Z","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"},"paper":{"abstract_excerpt":"Results are presented from a 500ks long XMM-Newton observation of the Narrow-Line Seyfert 1 galaxy IRAS13224-3809. The source is rapidly variable on timescales down to a few 100s. The spectrum shows strong broad Fe-K and L emission features which are interpreted as arising from reflection from the inner parts of an accretion disc around a rapidly spinning black hole. Assuming a power-law emissivity for the reflected flux and that the innermost radius corresponds to the innermost stable circular orbit, the black hole spin is measured to be 0.988 with a statistical precision better than one per ","authors_text":"A. C. Fabian, A. J. Young, A. Zoghbi, C. S. Reynolds, C.-Y. Chiang, D. J. Walton, D. R. Wilkins, E. Kara, E. M. Cackett, E. Nardini, G. Miniutti, G. Ponti, J. Malzac, J. M. Miller, J. Steiner, K. Lozanov, L. C. Gallo, P. Uttley, R. C. Reis, R. R. Ross, T. Boller, T. Dwelly, W. N. Brandt, Y. Tanaka","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-08-29T12:41:01Z","title":"Long XMM observation of the Narrow-Line Seyfert 1 galaxy IRAS13224-3809: rapid variability, high spin and a soft lag"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1208.5898","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":"sha256:005314e4c9ffd7b829eaa012891cd74ff3767848cc568a063b706b3025ece8ce","target":"record","created_at":"2026-05-18T01:54:50Z","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":"0cbc182bf073de5f6501e58dbae44294f978e6b6f92942abdb67ec69ceda792c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-08-29T12:41:01Z","title_canon_sha256":"ba07fcceb0877c89528af7884284dc8a4d4626cd591dfceaa75efcdee0c00630"},"schema_version":"1.0","source":{"id":"1208.5898","kind":"arxiv","version":1}},"canonical_sha256":"11c16cfe11f9e7628c60e6cb9c793c0ffad84d1a7e34b15ffda8c2794fb85eb3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"11c16cfe11f9e7628c60e6cb9c793c0ffad84d1a7e34b15ffda8c2794fb85eb3","first_computed_at":"2026-05-18T01:54:50.383695Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:54:50.383695Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"xnY5nlO3DcS5L/cVTLqdCuhWUdYz5n2tNGV648bbCqTLEVj2pm6rbq1BNnQlP/gL+P3L1ez/oUc8zk+zyEbUDA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:54:50.384382Z","signed_message":"canonical_sha256_bytes"},"source_id":"1208.5898","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:005314e4c9ffd7b829eaa012891cd74ff3767848cc568a063b706b3025ece8ce","sha256:a3f45de30191c1c3de2fcb8e38aa3c6836264c6d358671245f03c4f134acfeb0"],"state_sha256":"87dfba711d3288275583b1f5a1d7eb48a9928d9c98bc98cf59d84d7b3ac5e631"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vVaFsVNJuK8jDctY3vUhZq/kRCbfTwctBoAoi59YI3Qaa5hhoAY79oZzdUIu+kwCVDYwS1FEge6AC/tbegp2Dw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T20:37:29.236040Z","bundle_sha256":"ee2b20f9f022a2cdbbed1ac8d9cb5d97aa43945576bf81c947114038cfbed97e"}}