{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:ID72AT6VM2H57VQVUU5DATLCQ6","short_pith_number":"pith:ID72AT6V","canonical_record":{"source":{"id":"1107.5081","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2011-07-25T21:47:47Z","cross_cats_sorted":["hep-th"],"title_canon_sha256":"41a1a53b1ce4048229ea11bafac4949ec6fb272f729ec9c678f40011dc50e65b","abstract_canon_sha256":"dd2410c41d137d7749d9b65ea653a9d18018854db2c6f741be2e160475eaa4a8"},"schema_version":"1.0"},"canonical_sha256":"40ffa04fd5668fdfd615a53a304d6287b4a46b04eb45f3bfb6d0702050b56fae","source":{"kind":"arxiv","id":"1107.5081","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1107.5081","created_at":"2026-05-18T02:01:10Z"},{"alias_kind":"arxiv_version","alias_value":"1107.5081v2","created_at":"2026-05-18T02:01:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1107.5081","created_at":"2026-05-18T02:01:10Z"},{"alias_kind":"pith_short_12","alias_value":"ID72AT6VM2H5","created_at":"2026-05-18T12:26:30Z"},{"alias_kind":"pith_short_16","alias_value":"ID72AT6VM2H57VQV","created_at":"2026-05-18T12:26:30Z"},{"alias_kind":"pith_short_8","alias_value":"ID72AT6V","created_at":"2026-05-18T12:26:30Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:ID72AT6VM2H57VQVUU5DATLCQ6","target":"record","payload":{"canonical_record":{"source":{"id":"1107.5081","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2011-07-25T21:47:47Z","cross_cats_sorted":["hep-th"],"title_canon_sha256":"41a1a53b1ce4048229ea11bafac4949ec6fb272f729ec9c678f40011dc50e65b","abstract_canon_sha256":"dd2410c41d137d7749d9b65ea653a9d18018854db2c6f741be2e160475eaa4a8"},"schema_version":"1.0"},"canonical_sha256":"40ffa04fd5668fdfd615a53a304d6287b4a46b04eb45f3bfb6d0702050b56fae","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:01:10.091382Z","signature_b64":"5XFzmcJ34w+GBcs3LdTmk/CPdz4Kg59zbGWXFHq8l7qFa1J9H3AN/AICstYbTz5KV2SM4GTXkT+XJkHdtTx7Cw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"40ffa04fd5668fdfd615a53a304d6287b4a46b04eb45f3bfb6d0702050b56fae","last_reissued_at":"2026-05-18T02:01:10.090556Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:01:10.090556Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1107.5081","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":"2026-05-18T02:01:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NAF0jEH5dfT8FBzjom6ASHDF04RB16hsK+/9mDwTu6fs5rmzF+GPQyPOChwV/vxRy4gQdJVlTNPCTNgKFAr1Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-04T14:45:04.043280Z"},"content_sha256":"1673b1ab66072fad83386caa94f99f02afd4563e1f02227c2655d46c26588014","schema_version":"1.0","event_id":"sha256:1673b1ab66072fad83386caa94f99f02afd4563e1f02227c2655d46c26588014"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:ID72AT6VM2H57VQVUU5DATLCQ6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Where is the extremal Kerr ISCO?","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-th"],"primary_cat":"gr-qc","authors_text":"Ted Jacobson","submitted_at":"2011-07-25T21:47:47Z","abstract_excerpt":"Although the circular photon orbit and ISCO for the Kerr black hole remain distinct from each other and from the horizon in the extremal spin limit on a constant Boyer-Lindquist time slice, on a horizon-crossing slice they both coincide with the null generators of the horizon."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1107.5081","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":"2026-05-18T02:01:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fvjF+DutoBamTcKM0h9FyWpciyJIwoN8Jss0fuTtl15ivSbCaT92PFvKS48Bc4/OBXdnm5lvR6pobfs1RlZ/Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-04T14:45:04.043641Z"},"content_sha256":"67e0653b49cb55b2462085f0ee92f78367d6b2851e53e95261af5106887291f2","schema_version":"1.0","event_id":"sha256:67e0653b49cb55b2462085f0ee92f78367d6b2851e53e95261af5106887291f2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ID72AT6VM2H57VQVUU5DATLCQ6/bundle.json","state_url":"https://pith.science/pith/ID72AT6VM2H57VQVUU5DATLCQ6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ID72AT6VM2H57VQVUU5DATLCQ6/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":"2026-07-04T14:45:04Z","links":{"resolver":"https://pith.science/pith/ID72AT6VM2H57VQVUU5DATLCQ6","bundle":"https://pith.science/pith/ID72AT6VM2H57VQVUU5DATLCQ6/bundle.json","state":"https://pith.science/pith/ID72AT6VM2H57VQVUU5DATLCQ6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ID72AT6VM2H57VQVUU5DATLCQ6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:ID72AT6VM2H57VQVUU5DATLCQ6","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":"dd2410c41d137d7749d9b65ea653a9d18018854db2c6f741be2e160475eaa4a8","cross_cats_sorted":["hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2011-07-25T21:47:47Z","title_canon_sha256":"41a1a53b1ce4048229ea11bafac4949ec6fb272f729ec9c678f40011dc50e65b"},"schema_version":"1.0","source":{"id":"1107.5081","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1107.5081","created_at":"2026-05-18T02:01:10Z"},{"alias_kind":"arxiv_version","alias_value":"1107.5081v2","created_at":"2026-05-18T02:01:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1107.5081","created_at":"2026-05-18T02:01:10Z"},{"alias_kind":"pith_short_12","alias_value":"ID72AT6VM2H5","created_at":"2026-05-18T12:26:30Z"},{"alias_kind":"pith_short_16","alias_value":"ID72AT6VM2H57VQV","created_at":"2026-05-18T12:26:30Z"},{"alias_kind":"pith_short_8","alias_value":"ID72AT6V","created_at":"2026-05-18T12:26:30Z"}],"graph_snapshots":[{"event_id":"sha256:67e0653b49cb55b2462085f0ee92f78367d6b2851e53e95261af5106887291f2","target":"graph","created_at":"2026-05-18T02:01:10Z","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":"Although the circular photon orbit and ISCO for the Kerr black hole remain distinct from each other and from the horizon in the extremal spin limit on a constant Boyer-Lindquist time slice, on a horizon-crossing slice they both coincide with the null generators of the horizon.","authors_text":"Ted Jacobson","cross_cats":["hep-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2011-07-25T21:47:47Z","title":"Where is the extremal Kerr ISCO?"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1107.5081","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":"sha256:1673b1ab66072fad83386caa94f99f02afd4563e1f02227c2655d46c26588014","target":"record","created_at":"2026-05-18T02:01:10Z","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":"dd2410c41d137d7749d9b65ea653a9d18018854db2c6f741be2e160475eaa4a8","cross_cats_sorted":["hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2011-07-25T21:47:47Z","title_canon_sha256":"41a1a53b1ce4048229ea11bafac4949ec6fb272f729ec9c678f40011dc50e65b"},"schema_version":"1.0","source":{"id":"1107.5081","kind":"arxiv","version":2}},"canonical_sha256":"40ffa04fd5668fdfd615a53a304d6287b4a46b04eb45f3bfb6d0702050b56fae","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"40ffa04fd5668fdfd615a53a304d6287b4a46b04eb45f3bfb6d0702050b56fae","first_computed_at":"2026-05-18T02:01:10.090556Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:01:10.090556Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"5XFzmcJ34w+GBcs3LdTmk/CPdz4Kg59zbGWXFHq8l7qFa1J9H3AN/AICstYbTz5KV2SM4GTXkT+XJkHdtTx7Cw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:01:10.091382Z","signed_message":"canonical_sha256_bytes"},"source_id":"1107.5081","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1673b1ab66072fad83386caa94f99f02afd4563e1f02227c2655d46c26588014","sha256:67e0653b49cb55b2462085f0ee92f78367d6b2851e53e95261af5106887291f2"],"state_sha256":"3624a5015d6f4b7454dcd411705a7cfc972c42a69ba42efd92ff0d430e418b5e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MwCBkheN+snkM7bfHghKPwuYp77liuF0WeGpfauExR3yW6N8K22fhR2jIJ7v/lwZ0+PmxaqfqpGUXfdrtAC+BQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-04T14:45:04.045590Z","bundle_sha256":"b817ac369120b6403171ced0a5a5ab464ae50bcc696f0a80cc487fc092668576"}}