{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:CLNYRNYVKHE6NJK52BR7X3LFFA","short_pith_number":"pith:CLNYRNYV","canonical_record":{"source":{"id":"1203.2618","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-03-12T20:00:06Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"8bfaa89914b3baf54b0c0f66fe496c2e0a5cc9277e588712ea2ca321a630e4f3","abstract_canon_sha256":"71682149ed5c1c8e6c9fd361654f6956c40870c33702efaaf18decbdaa1e529d"},"schema_version":"1.0"},"canonical_sha256":"12db88b71551c9e6a55dd063fbed652820b414a00e7980b0745ca4563d5afcd9","source":{"kind":"arxiv","id":"1203.2618","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1203.2618","created_at":"2026-05-18T03:33:26Z"},{"alias_kind":"arxiv_version","alias_value":"1203.2618v1","created_at":"2026-05-18T03:33:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1203.2618","created_at":"2026-05-18T03:33:26Z"},{"alias_kind":"pith_short_12","alias_value":"CLNYRNYVKHE6","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_16","alias_value":"CLNYRNYVKHE6NJK5","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_8","alias_value":"CLNYRNYV","created_at":"2026-05-18T12:27:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:CLNYRNYVKHE6NJK52BR7X3LFFA","target":"record","payload":{"canonical_record":{"source":{"id":"1203.2618","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-03-12T20:00:06Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"8bfaa89914b3baf54b0c0f66fe496c2e0a5cc9277e588712ea2ca321a630e4f3","abstract_canon_sha256":"71682149ed5c1c8e6c9fd361654f6956c40870c33702efaaf18decbdaa1e529d"},"schema_version":"1.0"},"canonical_sha256":"12db88b71551c9e6a55dd063fbed652820b414a00e7980b0745ca4563d5afcd9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:33:26.215485Z","signature_b64":"G70LFw52jWdWxb6FgJ70LHNm2UueuTNDodwDJ3QMqXWpBAcmOfXtVdTbUpTUe5SwWdGr1+MSkUBsEKcFrmf/BA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"12db88b71551c9e6a55dd063fbed652820b414a00e7980b0745ca4563d5afcd9","last_reissued_at":"2026-05-18T03:33:26.214643Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:33:26.214643Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1203.2618","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":"2026-05-18T03:33:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rFlnCeVtXNu+gY5qgAXVlFORDCj7Z9/RQJ/SQ+mDPoxGoF/uSxLjjGrRBDKBI+ilkV5fLd1+n5dLn6b6rB38DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T00:42:51.156419Z"},"content_sha256":"7d6c080ea051a5dbfd05078ad76c6da5b88a946448bb37afcad6727631267fca","schema_version":"1.0","event_id":"sha256:7d6c080ea051a5dbfd05078ad76c6da5b88a946448bb37afcad6727631267fca"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:CLNYRNYVKHE6NJK52BR7X3LFFA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Modelling the black hole silhouette in Sgr A* with ion tori","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc"],"primary_cat":"astro-ph.GA","authors_text":"Eric Gourgoulhon, Frederic H. Vincent, Marek A. Abramowicz, Odele Straub, Thibaut Paumard","submitted_at":"2012-03-12T20:00:06Z","abstract_excerpt":"We calculate the \"observed at infinity\" image and spectrum of the accretion structure in Sgr A*, by modelling it as an optically thin, constant angular momentum ion torus in hydrodynamic equilibrium. The physics we consider includes a two-temperature plasma, a toroidal magnetic field, as well as radiative cooling by bremsstrahlung, synchrotron and inverse Compton processes. Our relativistic model has the virtue of being fully analytic and very simple, depending only on eight tunable parameters: the black hole spin and the inclination of the spin axis to our line of sight, the torus angular mom"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1203.2618","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":"2026-05-18T03:33:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"T4nIpyYoLSlJ5ydUQ2wSzLnKkOQCHHNWbsM4HV5QYCbKT4i/X/SuT3cuc1MHkKRjgGLTPreFk/STCPScgVa7BQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T00:42:51.156768Z"},"content_sha256":"ed5ba0ec01d29e2322a2231a5ea64c8f1cbdac3cb12a118b85d34eb02ccb42b6","schema_version":"1.0","event_id":"sha256:ed5ba0ec01d29e2322a2231a5ea64c8f1cbdac3cb12a118b85d34eb02ccb42b6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CLNYRNYVKHE6NJK52BR7X3LFFA/bundle.json","state_url":"https://pith.science/pith/CLNYRNYVKHE6NJK52BR7X3LFFA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CLNYRNYVKHE6NJK52BR7X3LFFA/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":"2026-06-03T00:42:51Z","links":{"resolver":"https://pith.science/pith/CLNYRNYVKHE6NJK52BR7X3LFFA","bundle":"https://pith.science/pith/CLNYRNYVKHE6NJK52BR7X3LFFA/bundle.json","state":"https://pith.science/pith/CLNYRNYVKHE6NJK52BR7X3LFFA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CLNYRNYVKHE6NJK52BR7X3LFFA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:CLNYRNYVKHE6NJK52BR7X3LFFA","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":"71682149ed5c1c8e6c9fd361654f6956c40870c33702efaaf18decbdaa1e529d","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-03-12T20:00:06Z","title_canon_sha256":"8bfaa89914b3baf54b0c0f66fe496c2e0a5cc9277e588712ea2ca321a630e4f3"},"schema_version":"1.0","source":{"id":"1203.2618","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1203.2618","created_at":"2026-05-18T03:33:26Z"},{"alias_kind":"arxiv_version","alias_value":"1203.2618v1","created_at":"2026-05-18T03:33:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1203.2618","created_at":"2026-05-18T03:33:26Z"},{"alias_kind":"pith_short_12","alias_value":"CLNYRNYVKHE6","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_16","alias_value":"CLNYRNYVKHE6NJK5","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_8","alias_value":"CLNYRNYV","created_at":"2026-05-18T12:27:01Z"}],"graph_snapshots":[{"event_id":"sha256:ed5ba0ec01d29e2322a2231a5ea64c8f1cbdac3cb12a118b85d34eb02ccb42b6","target":"graph","created_at":"2026-05-18T03:33:26Z","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":"We calculate the \"observed at infinity\" image and spectrum of the accretion structure in Sgr A*, by modelling it as an optically thin, constant angular momentum ion torus in hydrodynamic equilibrium. The physics we consider includes a two-temperature plasma, a toroidal magnetic field, as well as radiative cooling by bremsstrahlung, synchrotron and inverse Compton processes. Our relativistic model has the virtue of being fully analytic and very simple, depending only on eight tunable parameters: the black hole spin and the inclination of the spin axis to our line of sight, the torus angular mom","authors_text":"Eric Gourgoulhon, Frederic H. Vincent, Marek A. Abramowicz, Odele Straub, Thibaut Paumard","cross_cats":["gr-qc"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-03-12T20:00:06Z","title":"Modelling the black hole silhouette in Sgr A* with ion tori"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1203.2618","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":"sha256:7d6c080ea051a5dbfd05078ad76c6da5b88a946448bb37afcad6727631267fca","target":"record","created_at":"2026-05-18T03:33:26Z","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":"71682149ed5c1c8e6c9fd361654f6956c40870c33702efaaf18decbdaa1e529d","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-03-12T20:00:06Z","title_canon_sha256":"8bfaa89914b3baf54b0c0f66fe496c2e0a5cc9277e588712ea2ca321a630e4f3"},"schema_version":"1.0","source":{"id":"1203.2618","kind":"arxiv","version":1}},"canonical_sha256":"12db88b71551c9e6a55dd063fbed652820b414a00e7980b0745ca4563d5afcd9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"12db88b71551c9e6a55dd063fbed652820b414a00e7980b0745ca4563d5afcd9","first_computed_at":"2026-05-18T03:33:26.214643Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:33:26.214643Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"G70LFw52jWdWxb6FgJ70LHNm2UueuTNDodwDJ3QMqXWpBAcmOfXtVdTbUpTUe5SwWdGr1+MSkUBsEKcFrmf/BA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:33:26.215485Z","signed_message":"canonical_sha256_bytes"},"source_id":"1203.2618","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7d6c080ea051a5dbfd05078ad76c6da5b88a946448bb37afcad6727631267fca","sha256:ed5ba0ec01d29e2322a2231a5ea64c8f1cbdac3cb12a118b85d34eb02ccb42b6"],"state_sha256":"11fcf9ee89f65d622f7263110315400cc8c91fdfeefab11a22f428fbe068a55b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Fcg5iqtzsNhm6ZyiJaeqcFXMj6tnwHVlORqg79ih7/mm5LZporQp8b04r+YyMO3MXHu8JYVckcW9dAkJfUsAAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T00:42:51.158649Z","bundle_sha256":"3974a0362dc8bf89c2ac3fd252726aece21cd34abb1ec7b9e8aaf660d218281e"}}