{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:2XESEVFYFCJRJSZ6SWKQXNYWFC","short_pith_number":"pith:2XESEVFY","canonical_record":{"source":{"id":"1805.03798","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2018-05-10T03:24:58Z","cross_cats_sorted":[],"title_canon_sha256":"e87b3a5830f376778296b7062cb7c2facba386cff2f669c8175e1fa834e2227a","abstract_canon_sha256":"2a28c088489af860d5c8c5d6511f93e0413adcda00902fe02c69fcef2acf5315"},"schema_version":"1.0"},"canonical_sha256":"d5c92254b8289314cb3e95950bb71628a588e59feb175a99aaf2ad0d5c79196b","source":{"kind":"arxiv","id":"1805.03798","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1805.03798","created_at":"2026-05-18T00:06:02Z"},{"alias_kind":"arxiv_version","alias_value":"1805.03798v2","created_at":"2026-05-18T00:06:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1805.03798","created_at":"2026-05-18T00:06:02Z"},{"alias_kind":"pith_short_12","alias_value":"2XESEVFYFCJR","created_at":"2026-05-18T12:32:02Z"},{"alias_kind":"pith_short_16","alias_value":"2XESEVFYFCJRJSZ6","created_at":"2026-05-18T12:32:02Z"},{"alias_kind":"pith_short_8","alias_value":"2XESEVFY","created_at":"2026-05-18T12:32:02Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:2XESEVFYFCJRJSZ6SWKQXNYWFC","target":"record","payload":{"canonical_record":{"source":{"id":"1805.03798","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2018-05-10T03:24:58Z","cross_cats_sorted":[],"title_canon_sha256":"e87b3a5830f376778296b7062cb7c2facba386cff2f669c8175e1fa834e2227a","abstract_canon_sha256":"2a28c088489af860d5c8c5d6511f93e0413adcda00902fe02c69fcef2acf5315"},"schema_version":"1.0"},"canonical_sha256":"d5c92254b8289314cb3e95950bb71628a588e59feb175a99aaf2ad0d5c79196b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:06:02.233652Z","signature_b64":"7YKv8AAfkzEKI1Gr5xUevBKYVmAjFX5EC4kmod+JT+HkYOEt/OPkgFy2EKz9qH4b28sA7mokBUUBQV216iAXAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d5c92254b8289314cb3e95950bb71628a588e59feb175a99aaf2ad0d5c79196b","last_reissued_at":"2026-05-18T00:06:02.233211Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:06:02.233211Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1805.03798","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":"2026-05-18T00:06:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"we38qLPwYh9R7RoBJC1WAFQZdxMh2yLmirbw5I6kFoI/ha1G6XeU8RswaoKrPct/2lNNKwJSuisLkUtF1YkGBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T14:20:58.835183Z"},"content_sha256":"b10a63a41343b53996388d79606d7faee744426c707fdcfc5a6930d3cdfad0fb","schema_version":"1.0","event_id":"sha256:b10a63a41343b53996388d79606d7faee744426c707fdcfc5a6930d3cdfad0fb"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:2XESEVFYFCJRJSZ6SWKQXNYWFC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Shadows of Exact Binary Black Holes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Carlos A. R. Herdeiro, Maria J. Rodriguez, Pedro V.P. Cunha","submitted_at":"2018-05-10T03:24:58Z","abstract_excerpt":"Black hole (BH) shadows in dynamical binary BHs (BBHs) have been produced via ray-tracing techniques on top of expensive fully non-linear numerical relativity simulations. We show that the main features of these shadows are captured by a simple quasi-static resolution of the photon orbits on top of the static double-Schwarzschild family of solutions. Whilst the latter contains a conical singularity between the line separating the two BHs, this produces no major observable effect on the shadows, by virtue of the underlying cylindrical symmetry of the problem. This symmetry is also present in th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1805.03798","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":"2026-05-18T00:06:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ble90LAgHw+lUu12n5BNQ0rbIfmmmPUkiqGJ0TgiMR5NtBLMWk0Dgrf+psbxKQoA2KB9YBV/agTFDv52Cg+qCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T14:20:58.835945Z"},"content_sha256":"3e18e6d741eb78e09728514b21810a2f8ae43bd944d51a2023dd326e46ccf0f9","schema_version":"1.0","event_id":"sha256:3e18e6d741eb78e09728514b21810a2f8ae43bd944d51a2023dd326e46ccf0f9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2XESEVFYFCJRJSZ6SWKQXNYWFC/bundle.json","state_url":"https://pith.science/pith/2XESEVFYFCJRJSZ6SWKQXNYWFC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2XESEVFYFCJRJSZ6SWKQXNYWFC/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":"2026-05-31T14:20:58Z","links":{"resolver":"https://pith.science/pith/2XESEVFYFCJRJSZ6SWKQXNYWFC","bundle":"https://pith.science/pith/2XESEVFYFCJRJSZ6SWKQXNYWFC/bundle.json","state":"https://pith.science/pith/2XESEVFYFCJRJSZ6SWKQXNYWFC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2XESEVFYFCJRJSZ6SWKQXNYWFC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:2XESEVFYFCJRJSZ6SWKQXNYWFC","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":"2a28c088489af860d5c8c5d6511f93e0413adcda00902fe02c69fcef2acf5315","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2018-05-10T03:24:58Z","title_canon_sha256":"e87b3a5830f376778296b7062cb7c2facba386cff2f669c8175e1fa834e2227a"},"schema_version":"1.0","source":{"id":"1805.03798","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1805.03798","created_at":"2026-05-18T00:06:02Z"},{"alias_kind":"arxiv_version","alias_value":"1805.03798v2","created_at":"2026-05-18T00:06:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1805.03798","created_at":"2026-05-18T00:06:02Z"},{"alias_kind":"pith_short_12","alias_value":"2XESEVFYFCJR","created_at":"2026-05-18T12:32:02Z"},{"alias_kind":"pith_short_16","alias_value":"2XESEVFYFCJRJSZ6","created_at":"2026-05-18T12:32:02Z"},{"alias_kind":"pith_short_8","alias_value":"2XESEVFY","created_at":"2026-05-18T12:32:02Z"}],"graph_snapshots":[{"event_id":"sha256:3e18e6d741eb78e09728514b21810a2f8ae43bd944d51a2023dd326e46ccf0f9","target":"graph","created_at":"2026-05-18T00:06:02Z","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":"Black hole (BH) shadows in dynamical binary BHs (BBHs) have been produced via ray-tracing techniques on top of expensive fully non-linear numerical relativity simulations. We show that the main features of these shadows are captured by a simple quasi-static resolution of the photon orbits on top of the static double-Schwarzschild family of solutions. Whilst the latter contains a conical singularity between the line separating the two BHs, this produces no major observable effect on the shadows, by virtue of the underlying cylindrical symmetry of the problem. This symmetry is also present in th","authors_text":"Carlos A. R. Herdeiro, Maria J. Rodriguez, Pedro V.P. Cunha","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2018-05-10T03:24:58Z","title":"Shadows of Exact Binary Black Holes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1805.03798","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:b10a63a41343b53996388d79606d7faee744426c707fdcfc5a6930d3cdfad0fb","target":"record","created_at":"2026-05-18T00:06:02Z","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":"2a28c088489af860d5c8c5d6511f93e0413adcda00902fe02c69fcef2acf5315","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2018-05-10T03:24:58Z","title_canon_sha256":"e87b3a5830f376778296b7062cb7c2facba386cff2f669c8175e1fa834e2227a"},"schema_version":"1.0","source":{"id":"1805.03798","kind":"arxiv","version":2}},"canonical_sha256":"d5c92254b8289314cb3e95950bb71628a588e59feb175a99aaf2ad0d5c79196b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d5c92254b8289314cb3e95950bb71628a588e59feb175a99aaf2ad0d5c79196b","first_computed_at":"2026-05-18T00:06:02.233211Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:06:02.233211Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"7YKv8AAfkzEKI1Gr5xUevBKYVmAjFX5EC4kmod+JT+HkYOEt/OPkgFy2EKz9qH4b28sA7mokBUUBQV216iAXAg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:06:02.233652Z","signed_message":"canonical_sha256_bytes"},"source_id":"1805.03798","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b10a63a41343b53996388d79606d7faee744426c707fdcfc5a6930d3cdfad0fb","sha256:3e18e6d741eb78e09728514b21810a2f8ae43bd944d51a2023dd326e46ccf0f9"],"state_sha256":"4f6c1b3a0b716c4110655a394b9dc088098c5427c2279daf11d7bf4b0b3d3dab"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VKcPO02oiddQeq/53OuZXJbR/SU2fccrM/Bf3R9gdDNYWkIT80FJ9djdAgSu6sveFUZUtlE9DQX4K5DWOLzECw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T14:20:58.839775Z","bundle_sha256":"7059254c232967a64b30d289bcfd0c3153d7a34c64401260e8a4b6b3fc2632f1"}}