{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:VHLKEIQH4W4MJRAUFGCMLBTWMP","short_pith_number":"pith:VHLKEIQH","canonical_record":{"source":{"id":"1002.2211","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2010-02-10T21:15:19Z","cross_cats_sorted":[],"title_canon_sha256":"70dd5d8d88ba8cd64191acdf920378d1d9ee67e12a61030601ee382404d92568","abstract_canon_sha256":"c38c26b3d6a27960d6bbb52b5e4611680a4afbcd4148baa882c659f77306799e"},"schema_version":"1.0"},"canonical_sha256":"a9d6a22207e5b8c4c4142984c5867663f29f7286eb894e7fcf41eca1636f1642","source":{"kind":"arxiv","id":"1002.2211","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1002.2211","created_at":"2026-05-18T02:09:09Z"},{"alias_kind":"arxiv_version","alias_value":"1002.2211v2","created_at":"2026-05-18T02:09:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1002.2211","created_at":"2026-05-18T02:09:09Z"},{"alias_kind":"pith_short_12","alias_value":"VHLKEIQH4W4M","created_at":"2026-05-18T12:26:15Z"},{"alias_kind":"pith_short_16","alias_value":"VHLKEIQH4W4MJRAU","created_at":"2026-05-18T12:26:15Z"},{"alias_kind":"pith_short_8","alias_value":"VHLKEIQH","created_at":"2026-05-18T12:26:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:VHLKEIQH4W4MJRAUFGCMLBTWMP","target":"record","payload":{"canonical_record":{"source":{"id":"1002.2211","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2010-02-10T21:15:19Z","cross_cats_sorted":[],"title_canon_sha256":"70dd5d8d88ba8cd64191acdf920378d1d9ee67e12a61030601ee382404d92568","abstract_canon_sha256":"c38c26b3d6a27960d6bbb52b5e4611680a4afbcd4148baa882c659f77306799e"},"schema_version":"1.0"},"canonical_sha256":"a9d6a22207e5b8c4c4142984c5867663f29f7286eb894e7fcf41eca1636f1642","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:09:09.789325Z","signature_b64":"yfGpaCcLflPA/b52oYzve5WpDjrXrHNPvScjv0Gz8sqyamVIKLngBSzIBWIOv18SX6fppD96WobGVwyJckeXBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a9d6a22207e5b8c4c4142984c5867663f29f7286eb894e7fcf41eca1636f1642","last_reissued_at":"2026-05-18T02:09:09.788605Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:09:09.788605Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1002.2211","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:09:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rqmlJZL4gctBoN6G2quIA445j+FJwhj7RCB/WtG/0g+zTXyE8xgQjLrFZA5TYoL1t8TBShVkDJgf4RU4hrGBCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T19:36:43.805518Z"},"content_sha256":"4c43e61b155cd7492e1993d47769fd63e1079b581ba5cb6b16c6b2af4bcac094","schema_version":"1.0","event_id":"sha256:4c43e61b155cd7492e1993d47769fd63e1079b581ba5cb6b16c6b2af4bcac094"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:VHLKEIQH4W4MJRAUFGCMLBTWMP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Spin of the Black Hole in the Soft X-ray Transient A0620--00","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Andrew G. Cantrell (2), Charles D. Bailyn (2), James F. Steiner (1), Jeffrey E. McClintock (1), Jerome A. Orosz (3) ((1) CfA (2) Yale (3) SDSU), Lijun Gou (1), Ramesh Narayan (1)","submitted_at":"2010-02-10T21:15:19Z","abstract_excerpt":"During its yearlong outburst in 1975--76, the transient source A0620--00 reached an intensity of 50 Crab, an all-time record for any X-ray binary. The source has been quiescent since. We recently determined accurate values for the black hole mass, orbital inclination angle and distance. Building on these results, we have measured the radius of the inner edge of the accretion disk around the black hole primary by fitting its thermal continuum spectrum to our version of the relativistic Novikov-Thorne thin-disk model. We have thereby estimated the spin of the black hole. Although our spin estima"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1002.2211","kind":"arxiv","version":2},"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":"2026-05-18T02:09:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nceR3iCdzXviaM8T5oLFiC2eLHnYlH4MLLPlQV3GOaVnBNKSjqBEU47giYLypStYJ/rAhH8XLUbHpKvx25EeDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T19:36:43.806221Z"},"content_sha256":"b43a9f189657ab1a65003617cd3acf060c1e256dfe28ca71bebc690c2b107ff8","schema_version":"1.0","event_id":"sha256:b43a9f189657ab1a65003617cd3acf060c1e256dfe28ca71bebc690c2b107ff8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VHLKEIQH4W4MJRAUFGCMLBTWMP/bundle.json","state_url":"https://pith.science/pith/VHLKEIQH4W4MJRAUFGCMLBTWMP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VHLKEIQH4W4MJRAUFGCMLBTWMP/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":"2026-05-25T19:36:43Z","links":{"resolver":"https://pith.science/pith/VHLKEIQH4W4MJRAUFGCMLBTWMP","bundle":"https://pith.science/pith/VHLKEIQH4W4MJRAUFGCMLBTWMP/bundle.json","state":"https://pith.science/pith/VHLKEIQH4W4MJRAUFGCMLBTWMP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VHLKEIQH4W4MJRAUFGCMLBTWMP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:VHLKEIQH4W4MJRAUFGCMLBTWMP","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":"c38c26b3d6a27960d6bbb52b5e4611680a4afbcd4148baa882c659f77306799e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2010-02-10T21:15:19Z","title_canon_sha256":"70dd5d8d88ba8cd64191acdf920378d1d9ee67e12a61030601ee382404d92568"},"schema_version":"1.0","source":{"id":"1002.2211","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1002.2211","created_at":"2026-05-18T02:09:09Z"},{"alias_kind":"arxiv_version","alias_value":"1002.2211v2","created_at":"2026-05-18T02:09:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1002.2211","created_at":"2026-05-18T02:09:09Z"},{"alias_kind":"pith_short_12","alias_value":"VHLKEIQH4W4M","created_at":"2026-05-18T12:26:15Z"},{"alias_kind":"pith_short_16","alias_value":"VHLKEIQH4W4MJRAU","created_at":"2026-05-18T12:26:15Z"},{"alias_kind":"pith_short_8","alias_value":"VHLKEIQH","created_at":"2026-05-18T12:26:15Z"}],"graph_snapshots":[{"event_id":"sha256:b43a9f189657ab1a65003617cd3acf060c1e256dfe28ca71bebc690c2b107ff8","target":"graph","created_at":"2026-05-18T02:09:09Z","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":"During its yearlong outburst in 1975--76, the transient source A0620--00 reached an intensity of 50 Crab, an all-time record for any X-ray binary. The source has been quiescent since. We recently determined accurate values for the black hole mass, orbital inclination angle and distance. Building on these results, we have measured the radius of the inner edge of the accretion disk around the black hole primary by fitting its thermal continuum spectrum to our version of the relativistic Novikov-Thorne thin-disk model. We have thereby estimated the spin of the black hole. Although our spin estima","authors_text":"Andrew G. Cantrell (2), Charles D. Bailyn (2), James F. Steiner (1), Jeffrey E. McClintock (1), Jerome A. Orosz (3) ((1) CfA (2) Yale (3) SDSU), Lijun Gou (1), Ramesh Narayan (1)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2010-02-10T21:15:19Z","title":"The Spin of the Black Hole in the Soft X-ray Transient A0620--00"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1002.2211","kind":"arxiv","version":2},"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":"sha256:4c43e61b155cd7492e1993d47769fd63e1079b581ba5cb6b16c6b2af4bcac094","target":"record","created_at":"2026-05-18T02:09:09Z","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":"c38c26b3d6a27960d6bbb52b5e4611680a4afbcd4148baa882c659f77306799e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2010-02-10T21:15:19Z","title_canon_sha256":"70dd5d8d88ba8cd64191acdf920378d1d9ee67e12a61030601ee382404d92568"},"schema_version":"1.0","source":{"id":"1002.2211","kind":"arxiv","version":2}},"canonical_sha256":"a9d6a22207e5b8c4c4142984c5867663f29f7286eb894e7fcf41eca1636f1642","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a9d6a22207e5b8c4c4142984c5867663f29f7286eb894e7fcf41eca1636f1642","first_computed_at":"2026-05-18T02:09:09.788605Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:09:09.788605Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"yfGpaCcLflPA/b52oYzve5WpDjrXrHNPvScjv0Gz8sqyamVIKLngBSzIBWIOv18SX6fppD96WobGVwyJckeXBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:09:09.789325Z","signed_message":"canonical_sha256_bytes"},"source_id":"1002.2211","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4c43e61b155cd7492e1993d47769fd63e1079b581ba5cb6b16c6b2af4bcac094","sha256:b43a9f189657ab1a65003617cd3acf060c1e256dfe28ca71bebc690c2b107ff8"],"state_sha256":"1d0e5312f37986c65398adea0854da9f71f2ee557dac1cc1200ff7c24d57e675"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aCWcuJWdID2pdCU5a30EJ6NPNhUDmqNVrsY4IzqBT5BbEsRHa8JpoicWC+B2jqlPbkHjUMEPTiIenK2I6mqvCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T19:36:43.812488Z","bundle_sha256":"9ffae5ac432ff2c3a9ce6ad902232a830effffbead97157e44cfddec587608dc"}}