{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:4WVX3ML5XZ4QG4PCWT5X5UEDSF","short_pith_number":"pith:4WVX3ML5","canonical_record":{"source":{"id":"1509.00021","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2015-08-31T20:14:13Z","cross_cats_sorted":["astro-ph.HE","hep-th"],"title_canon_sha256":"3de68f619a9c3199b699ac1480c32aeca89454980ce8226c6898291f856d8fae","abstract_canon_sha256":"6336d262f572451f4d0ca93ad027c5f9bb3e65ec33fefc4d559b12914da8d5a2"},"schema_version":"1.0"},"canonical_sha256":"e5ab7db17dbe790371e2b4fb7ed0839175e82a45005f62f5cca782d3e43bbd93","source":{"kind":"arxiv","id":"1509.00021","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1509.00021","created_at":"2026-05-18T01:26:09Z"},{"alias_kind":"arxiv_version","alias_value":"1509.00021v2","created_at":"2026-05-18T01:26:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.00021","created_at":"2026-05-18T01:26:09Z"},{"alias_kind":"pith_short_12","alias_value":"4WVX3ML5XZ4Q","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_16","alias_value":"4WVX3ML5XZ4QG4PC","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_8","alias_value":"4WVX3ML5","created_at":"2026-05-18T12:29:05Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:4WVX3ML5XZ4QG4PCWT5X5UEDSF","target":"record","payload":{"canonical_record":{"source":{"id":"1509.00021","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2015-08-31T20:14:13Z","cross_cats_sorted":["astro-ph.HE","hep-th"],"title_canon_sha256":"3de68f619a9c3199b699ac1480c32aeca89454980ce8226c6898291f856d8fae","abstract_canon_sha256":"6336d262f572451f4d0ca93ad027c5f9bb3e65ec33fefc4d559b12914da8d5a2"},"schema_version":"1.0"},"canonical_sha256":"e5ab7db17dbe790371e2b4fb7ed0839175e82a45005f62f5cca782d3e43bbd93","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:26:09.633005Z","signature_b64":"DqVVDbxP2G/a518GroBQ/NBZGsroIoe2ujgt7r5u1h4An97l3BLY+uYrbRU9UY3/l9EuhrZbp8LVTLOcOAlYDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e5ab7db17dbe790371e2b4fb7ed0839175e82a45005f62f5cca782d3e43bbd93","last_reissued_at":"2026-05-18T01:26:09.632401Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:26:09.632401Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1509.00021","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":"2026-05-18T01:26:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"03BwTZxljK1drwWNU22x6Zg20aQNd4x22StS8yws5aYNhWyqi72ITSCgY9aSJHg8C5/p696tN/31cQxa67nWAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T19:14:13.331626Z"},"content_sha256":"8fa572c02b3693c3494299f840673a423f5cdc03284830fb466815f79cea6692","schema_version":"1.0","event_id":"sha256:8fa572c02b3693c3494299f840673a423f5cdc03284830fb466815f79cea6692"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:4WVX3ML5XZ4QG4PCWT5X5UEDSF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Shadows of Kerr black holes with scalar hair","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE","hep-th"],"primary_cat":"gr-qc","authors_text":"Carlos A. R. Herdeiro, Eugen Radu, Helgi F. Runarsson, Pedro V. P. Cunha","submitted_at":"2015-08-31T20:14:13Z","abstract_excerpt":"Using backwards ray tracing, we study the shadows of Kerr black holes with scalar hair (KBHsSH). KBHsSH interpolate continuously between Kerr BHs and boson stars (BSs), so we start by investigating the lensing of light due to BSs. Moving from the weak to the strong gravity region, BSs - which by themselves have no shadows - are classified, according to the lensing produced, as: $(i)$ non-compact, which yield no multiple images; $(ii)$ compact, which produce an increasing number of Einstein rings and multiple images of the whole celestial sphere; $(iii)$ ultra-compact, which possess light rings"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.00021","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":"2026-05-18T01:26:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"D91qeeX7ITlJ1173G93nB7p+ryEIr4XeLrBHT7SiCjCK1XsCRvZBb78xgYXFQ/Vptu7qHYQqZTIlu384Ab0wAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T19:14:13.331985Z"},"content_sha256":"03f079c39131e38f343d84dc62705213d5056ca74102a86294afead41059edc9","schema_version":"1.0","event_id":"sha256:03f079c39131e38f343d84dc62705213d5056ca74102a86294afead41059edc9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4WVX3ML5XZ4QG4PCWT5X5UEDSF/bundle.json","state_url":"https://pith.science/pith/4WVX3ML5XZ4QG4PCWT5X5UEDSF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4WVX3ML5XZ4QG4PCWT5X5UEDSF/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":"2026-05-28T19:14:13Z","links":{"resolver":"https://pith.science/pith/4WVX3ML5XZ4QG4PCWT5X5UEDSF","bundle":"https://pith.science/pith/4WVX3ML5XZ4QG4PCWT5X5UEDSF/bundle.json","state":"https://pith.science/pith/4WVX3ML5XZ4QG4PCWT5X5UEDSF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4WVX3ML5XZ4QG4PCWT5X5UEDSF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:4WVX3ML5XZ4QG4PCWT5X5UEDSF","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":"6336d262f572451f4d0ca93ad027c5f9bb3e65ec33fefc4d559b12914da8d5a2","cross_cats_sorted":["astro-ph.HE","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2015-08-31T20:14:13Z","title_canon_sha256":"3de68f619a9c3199b699ac1480c32aeca89454980ce8226c6898291f856d8fae"},"schema_version":"1.0","source":{"id":"1509.00021","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1509.00021","created_at":"2026-05-18T01:26:09Z"},{"alias_kind":"arxiv_version","alias_value":"1509.00021v2","created_at":"2026-05-18T01:26:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.00021","created_at":"2026-05-18T01:26:09Z"},{"alias_kind":"pith_short_12","alias_value":"4WVX3ML5XZ4Q","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_16","alias_value":"4WVX3ML5XZ4QG4PC","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_8","alias_value":"4WVX3ML5","created_at":"2026-05-18T12:29:05Z"}],"graph_snapshots":[{"event_id":"sha256:03f079c39131e38f343d84dc62705213d5056ca74102a86294afead41059edc9","target":"graph","created_at":"2026-05-18T01:26:09Z","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":"Using backwards ray tracing, we study the shadows of Kerr black holes with scalar hair (KBHsSH). KBHsSH interpolate continuously between Kerr BHs and boson stars (BSs), so we start by investigating the lensing of light due to BSs. Moving from the weak to the strong gravity region, BSs - which by themselves have no shadows - are classified, according to the lensing produced, as: $(i)$ non-compact, which yield no multiple images; $(ii)$ compact, which produce an increasing number of Einstein rings and multiple images of the whole celestial sphere; $(iii)$ ultra-compact, which possess light rings","authors_text":"Carlos A. R. Herdeiro, Eugen Radu, Helgi F. Runarsson, Pedro V. P. Cunha","cross_cats":["astro-ph.HE","hep-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2015-08-31T20:14:13Z","title":"Shadows of Kerr black holes with scalar hair"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.00021","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":"sha256:8fa572c02b3693c3494299f840673a423f5cdc03284830fb466815f79cea6692","target":"record","created_at":"2026-05-18T01:26:09Z","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":"6336d262f572451f4d0ca93ad027c5f9bb3e65ec33fefc4d559b12914da8d5a2","cross_cats_sorted":["astro-ph.HE","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2015-08-31T20:14:13Z","title_canon_sha256":"3de68f619a9c3199b699ac1480c32aeca89454980ce8226c6898291f856d8fae"},"schema_version":"1.0","source":{"id":"1509.00021","kind":"arxiv","version":2}},"canonical_sha256":"e5ab7db17dbe790371e2b4fb7ed0839175e82a45005f62f5cca782d3e43bbd93","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e5ab7db17dbe790371e2b4fb7ed0839175e82a45005f62f5cca782d3e43bbd93","first_computed_at":"2026-05-18T01:26:09.632401Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:26:09.632401Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"DqVVDbxP2G/a518GroBQ/NBZGsroIoe2ujgt7r5u1h4An97l3BLY+uYrbRU9UY3/l9EuhrZbp8LVTLOcOAlYDg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:26:09.633005Z","signed_message":"canonical_sha256_bytes"},"source_id":"1509.00021","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8fa572c02b3693c3494299f840673a423f5cdc03284830fb466815f79cea6692","sha256:03f079c39131e38f343d84dc62705213d5056ca74102a86294afead41059edc9"],"state_sha256":"6aa8f77801753a9b90940fef837b18be7e675892c336c01a0866c2b937c4d341"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vNgEuP9wwRZbvHat5LpPEll2taXhBlXu/wBQxlyADtB+FxChTfkTKK1mxJhstvhggEGjxrK+BddcNqHocI7yDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T19:14:13.334003Z","bundle_sha256":"a19a93c1a91319518037d6800cc076ed5b397145a934e3b5cce9858104a4343c"}}