{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:4VEZDT77EGM2HJFZPQBMJ2VOT4","short_pith_number":"pith:4VEZDT77","canonical_record":{"source":{"id":"1202.0348","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-02-02T03:32:18Z","cross_cats_sorted":[],"title_canon_sha256":"baec51f4686bc1df365ed3c03a35b98cfbb75723d5d0266f310b15930d1b2efc","abstract_canon_sha256":"bfaa1b44ba4518b3ad42b63f4a7e6983a4f739cf312fe32059ab00b135af3df6"},"schema_version":"1.0"},"canonical_sha256":"e54991cfff2199a3a4b97c02c4eaae9f0e430b2a0f1ed3d962fb5b1db66f7c31","source":{"kind":"arxiv","id":"1202.0348","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1202.0348","created_at":"2026-05-18T01:58:36Z"},{"alias_kind":"arxiv_version","alias_value":"1202.0348v1","created_at":"2026-05-18T01:58:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1202.0348","created_at":"2026-05-18T01:58:36Z"},{"alias_kind":"pith_short_12","alias_value":"4VEZDT77EGM2","created_at":"2026-05-18T12:26:53Z"},{"alias_kind":"pith_short_16","alias_value":"4VEZDT77EGM2HJFZ","created_at":"2026-05-18T12:26:53Z"},{"alias_kind":"pith_short_8","alias_value":"4VEZDT77","created_at":"2026-05-18T12:26:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:4VEZDT77EGM2HJFZPQBMJ2VOT4","target":"record","payload":{"canonical_record":{"source":{"id":"1202.0348","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-02-02T03:32:18Z","cross_cats_sorted":[],"title_canon_sha256":"baec51f4686bc1df365ed3c03a35b98cfbb75723d5d0266f310b15930d1b2efc","abstract_canon_sha256":"bfaa1b44ba4518b3ad42b63f4a7e6983a4f739cf312fe32059ab00b135af3df6"},"schema_version":"1.0"},"canonical_sha256":"e54991cfff2199a3a4b97c02c4eaae9f0e430b2a0f1ed3d962fb5b1db66f7c31","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:58:36.461158Z","signature_b64":"S4Vk8NVbzv/kcDCDUoVcqaW3wkqWKGoTQaMdfoHn7KHBcBlbOTVrQ2RwirYpJCysYQwLtiMyp2l0J7BKK2wRCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e54991cfff2199a3a4b97c02c4eaae9f0e430b2a0f1ed3d962fb5b1db66f7c31","last_reissued_at":"2026-05-18T01:58:36.460690Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:58:36.460690Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1202.0348","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":"2026-05-18T01:58:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Dca9eVeUyDJUS9BOc+ckDX0FOe1CTdcqOJ+RyMUsrbdDt1ywei7Ouv19xFRmb1UQHtDwUsSOZCrsih0XH5m1BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T22:23:08.011153Z"},"content_sha256":"dd19ccbc4a7fb675edea7f0caa6e761523c811ffef72e27b6b2f63ab0302a7d3","schema_version":"1.0","event_id":"sha256:dd19ccbc4a7fb675edea7f0caa6e761523c811ffef72e27b6b2f63ab0302a7d3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:4VEZDT77EGM2HJFZPQBMJ2VOT4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Radiative Models of Sagittarius A* and M87 from Relativistic MHD Simulations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Eric Agol, Jason Dexter, Jonathan C. McKinney, P. Chris Fragile","submitted_at":"2012-02-02T03:32:18Z","abstract_excerpt":"Ongoing millimeter VLBI observations with the Event Horizon Telescope allow unprecedented study of the innermost portion of black hole accretion flows. Interpreting the observations requires relativistic, time-dependent physical modeling. We discuss the comparison of radiative transfer calculations from general relativistic MHD simulations of Sagittarius A* and M87 with current and future mm-VLBI observations. This comparison allows estimates of the viewing geometry and physical conditions of the Sgr A* accretion flow. The viewing geometry for M87 is already constrained from observations of it"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1202.0348","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":"2026-05-18T01:58:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"shmlQjZp/z+ncjyNO6Uc72OC+4fvV6Ln40aLAybCIxOw7+otuFO+kybBAO3Pp6wDVE35/w7uvimslz7ynevjDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T22:23:08.011861Z"},"content_sha256":"3f2dbbf34b01d352e64e3d2b1695426b585948da4371e63be5ea82f14c638cfb","schema_version":"1.0","event_id":"sha256:3f2dbbf34b01d352e64e3d2b1695426b585948da4371e63be5ea82f14c638cfb"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4VEZDT77EGM2HJFZPQBMJ2VOT4/bundle.json","state_url":"https://pith.science/pith/4VEZDT77EGM2HJFZPQBMJ2VOT4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4VEZDT77EGM2HJFZPQBMJ2VOT4/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":"2026-05-25T22:23:08Z","links":{"resolver":"https://pith.science/pith/4VEZDT77EGM2HJFZPQBMJ2VOT4","bundle":"https://pith.science/pith/4VEZDT77EGM2HJFZPQBMJ2VOT4/bundle.json","state":"https://pith.science/pith/4VEZDT77EGM2HJFZPQBMJ2VOT4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4VEZDT77EGM2HJFZPQBMJ2VOT4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:4VEZDT77EGM2HJFZPQBMJ2VOT4","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":"bfaa1b44ba4518b3ad42b63f4a7e6983a4f739cf312fe32059ab00b135af3df6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-02-02T03:32:18Z","title_canon_sha256":"baec51f4686bc1df365ed3c03a35b98cfbb75723d5d0266f310b15930d1b2efc"},"schema_version":"1.0","source":{"id":"1202.0348","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1202.0348","created_at":"2026-05-18T01:58:36Z"},{"alias_kind":"arxiv_version","alias_value":"1202.0348v1","created_at":"2026-05-18T01:58:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1202.0348","created_at":"2026-05-18T01:58:36Z"},{"alias_kind":"pith_short_12","alias_value":"4VEZDT77EGM2","created_at":"2026-05-18T12:26:53Z"},{"alias_kind":"pith_short_16","alias_value":"4VEZDT77EGM2HJFZ","created_at":"2026-05-18T12:26:53Z"},{"alias_kind":"pith_short_8","alias_value":"4VEZDT77","created_at":"2026-05-18T12:26:53Z"}],"graph_snapshots":[{"event_id":"sha256:3f2dbbf34b01d352e64e3d2b1695426b585948da4371e63be5ea82f14c638cfb","target":"graph","created_at":"2026-05-18T01:58:36Z","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":"Ongoing millimeter VLBI observations with the Event Horizon Telescope allow unprecedented study of the innermost portion of black hole accretion flows. Interpreting the observations requires relativistic, time-dependent physical modeling. We discuss the comparison of radiative transfer calculations from general relativistic MHD simulations of Sagittarius A* and M87 with current and future mm-VLBI observations. This comparison allows estimates of the viewing geometry and physical conditions of the Sgr A* accretion flow. The viewing geometry for M87 is already constrained from observations of it","authors_text":"Eric Agol, Jason Dexter, Jonathan C. McKinney, P. Chris Fragile","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-02-02T03:32:18Z","title":"Radiative Models of Sagittarius A* and M87 from Relativistic MHD Simulations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1202.0348","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:dd19ccbc4a7fb675edea7f0caa6e761523c811ffef72e27b6b2f63ab0302a7d3","target":"record","created_at":"2026-05-18T01:58:36Z","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":"bfaa1b44ba4518b3ad42b63f4a7e6983a4f739cf312fe32059ab00b135af3df6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-02-02T03:32:18Z","title_canon_sha256":"baec51f4686bc1df365ed3c03a35b98cfbb75723d5d0266f310b15930d1b2efc"},"schema_version":"1.0","source":{"id":"1202.0348","kind":"arxiv","version":1}},"canonical_sha256":"e54991cfff2199a3a4b97c02c4eaae9f0e430b2a0f1ed3d962fb5b1db66f7c31","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e54991cfff2199a3a4b97c02c4eaae9f0e430b2a0f1ed3d962fb5b1db66f7c31","first_computed_at":"2026-05-18T01:58:36.460690Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:58:36.460690Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"S4Vk8NVbzv/kcDCDUoVcqaW3wkqWKGoTQaMdfoHn7KHBcBlbOTVrQ2RwirYpJCysYQwLtiMyp2l0J7BKK2wRCA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:58:36.461158Z","signed_message":"canonical_sha256_bytes"},"source_id":"1202.0348","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:dd19ccbc4a7fb675edea7f0caa6e761523c811ffef72e27b6b2f63ab0302a7d3","sha256:3f2dbbf34b01d352e64e3d2b1695426b585948da4371e63be5ea82f14c638cfb"],"state_sha256":"9f7330f25750c0ca491d5d7702224699914882b6ef4fdc04953931cea7a054fb"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jC4tW367hwF0foVf7UvZa7A5Dx7nTQiwgxqwwl3HZAF4NO5qvI6elKx1ovlblOao1ZwlAoTldaUlRHH/ERITBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T22:23:08.015643Z","bundle_sha256":"47073e27a6822bf60a65f39232e53d5d051e2bc57fb9da4ddd80e1e5fca4165f"}}