{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:EYSR2CWWBSHBYNEFHTTYLWV5HU","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":"74619b1f16f2f086ef19ecb7577831cffff31099d9ebdd478684577a54307202","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-11-07T22:52:03Z","title_canon_sha256":"df3a205862ad8232f82e4af7956ffdeaefb47f10a2025b97eba316e218987e0e"},"schema_version":"1.0","source":{"id":"1311.1841","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1311.1841","created_at":"2026-05-18T01:46:33Z"},{"alias_kind":"arxiv_version","alias_value":"1311.1841v1","created_at":"2026-05-18T01:46:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1311.1841","created_at":"2026-05-18T01:46:33Z"},{"alias_kind":"pith_short_12","alias_value":"EYSR2CWWBSHB","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_16","alias_value":"EYSR2CWWBSHBYNEF","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_8","alias_value":"EYSR2CWW","created_at":"2026-05-18T12:27:43Z"}],"graph_snapshots":[{"event_id":"sha256:91332e0f6d7ca400252379ffcd9e20ae33892ec77ef3f1026fe878d14d8e5132","target":"graph","created_at":"2026-05-18T01:46:33Z","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":"The center of our Galaxy hosts the best constrained supermassive black hole in the universe, Sagittarius A* (Sgr A*). Its mass and distance have been accurately determined from stellar orbits and proper motion studies, respectively, and its high-frequency radio, and highly variable near-infrared and X-ray emission originate from within a few Schwarzschild radii of the event horizon. The theory of general relativity (GR) predicts the appearance of a black hole shadow, which is a lensed image of the event horizon. This shadow can be resolved by very long baseline radio interferometry and test ba","authors_text":"Heino Falcke, Sera Markoff","cross_cats":["gr-qc"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-11-07T22:52:03Z","title":"Towards the event horizon -- the supermassive black hole in the Galactic Center"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1311.1841","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:cfe7b2df4bbb00fd82e0a57262ffed615679e33226eb1726ed1cb0a2c8a3da19","target":"record","created_at":"2026-05-18T01:46:33Z","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":"74619b1f16f2f086ef19ecb7577831cffff31099d9ebdd478684577a54307202","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-11-07T22:52:03Z","title_canon_sha256":"df3a205862ad8232f82e4af7956ffdeaefb47f10a2025b97eba316e218987e0e"},"schema_version":"1.0","source":{"id":"1311.1841","kind":"arxiv","version":1}},"canonical_sha256":"26251d0ad60c8e1c34853ce785dabd3d005a6c5203b6ab13c65d086702a36314","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"26251d0ad60c8e1c34853ce785dabd3d005a6c5203b6ab13c65d086702a36314","first_computed_at":"2026-05-18T01:46:33.048049Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:46:33.048049Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"diVykUY6XrtAuP7NTxvxcSOR5aEtVIMzX2iGtCMnJYJ9LHM6+NeC8o07iohTN/rxi54vfQ9ebYvTzn/14cL+DQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:46:33.048475Z","signed_message":"canonical_sha256_bytes"},"source_id":"1311.1841","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cfe7b2df4bbb00fd82e0a57262ffed615679e33226eb1726ed1cb0a2c8a3da19","sha256:91332e0f6d7ca400252379ffcd9e20ae33892ec77ef3f1026fe878d14d8e5132"],"state_sha256":"cf04bcb8e50ac4ec0f8fce4b4686506cb7ae5588bd9d4a528dba0acb5132b296"}