{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:TJRD3TS4OXRL6N4FRCBE5465L4","short_pith_number":"pith:TJRD3TS4","canonical_record":{"source":{"id":"2507.17217","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2025-07-23T05:28:22Z","cross_cats_sorted":[],"title_canon_sha256":"fe4a3ea50eb393b0e9c4c017a4921074bf3c77dddae77de98c268638434b7a72","abstract_canon_sha256":"059fd1c5d031722b273673e332635453924a5bcdf8bcfa8f4ec2cf10afa8871b"},"schema_version":"1.0"},"canonical_sha256":"9a623dce5c75e2bf378588824ef3dd5f2678109a21c3914843ed3195323199ee","source":{"kind":"arxiv","id":"2507.17217","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2507.17217","created_at":"2026-07-05T11:42:03Z"},{"alias_kind":"arxiv_version","alias_value":"2507.17217v1","created_at":"2026-07-05T11:42:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2507.17217","created_at":"2026-07-05T11:42:03Z"},{"alias_kind":"pith_short_12","alias_value":"TJRD3TS4OXRL","created_at":"2026-07-05T11:42:03Z"},{"alias_kind":"pith_short_16","alias_value":"TJRD3TS4OXRL6N4F","created_at":"2026-07-05T11:42:03Z"},{"alias_kind":"pith_short_8","alias_value":"TJRD3TS4","created_at":"2026-07-05T11:42:03Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:TJRD3TS4OXRL6N4FRCBE5465L4","target":"record","payload":{"canonical_record":{"source":{"id":"2507.17217","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2025-07-23T05:28:22Z","cross_cats_sorted":[],"title_canon_sha256":"fe4a3ea50eb393b0e9c4c017a4921074bf3c77dddae77de98c268638434b7a72","abstract_canon_sha256":"059fd1c5d031722b273673e332635453924a5bcdf8bcfa8f4ec2cf10afa8871b"},"schema_version":"1.0"},"canonical_sha256":"9a623dce5c75e2bf378588824ef3dd5f2678109a21c3914843ed3195323199ee","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:42:03.672754Z","signature_b64":"zgo+C26fWIGXyYWN+O9qstN9X7JeURO/UD2HmwWBhqsHq6IYfUzV63h6iHfKWIyb1/yro0XALu+6ZEbhzQ+IDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9a623dce5c75e2bf378588824ef3dd5f2678109a21c3914843ed3195323199ee","last_reissued_at":"2026-07-05T11:42:03.672243Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:42:03.672243Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2507.17217","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":"2026-07-05T11:42:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dZCK8H/A5dY6kol304JTfGI+9fMPGKna3fWH0oB8tGrBXC47BUrMEdIs3RmtrRty0rD/jisD50ro28WmRm33BQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T08:21:01.348582Z"},"content_sha256":"d72fcb31431fb9d4f771f8784bf3f73032c15b1e187674f61465458d10bfd9c2","schema_version":"1.0","event_id":"sha256:d72fcb31431fb9d4f771f8784bf3f73032c15b1e187674f61465458d10bfd9c2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:TJRD3TS4OXRL6N4FRCBE5465L4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Optical images of the Kerr-Sen black hole and thin accretion disk","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Bo-Feng Wu, Li-Fang Li, Pei Wang, Qing-Quan Jiang, Sen Guo, Wen-Hao Deng, Zhan-Feng Mai","submitted_at":"2025-07-23T05:28:22Z","abstract_excerpt":"This paper investigates the observable properties of a Kerr-Sen black hole surrounded by a thin accretion disk, focusing on the impact of the black hole's spin and charge on the image. Using ray-tracing techniques, we conduct a detailed analysis of the black hole's image, redshift distribution, and intensity distributions at different observation frequencies. The results demonstrate that spin has a more significant effect on the distortion of the inner shadow than charge, and the observer's inclination angle plays a critical role in shaping the redshift distribution, especially near the innerm"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2507.17217","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2507.17217/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T11:42:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lUPrv9jRZHUsqvg1FOq56dlrcA0NlpEPT4Bv4Cxd4WIARDv5s+4Jq50qqcaOQ59juojH2oX8MMl5+Xm7EuIXBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T08:21:01.349160Z"},"content_sha256":"0fafc4dd967a4e93a6bcfd2a107b6c35eebe0ac78b7746ee6e8ae7dc97c736e5","schema_version":"1.0","event_id":"sha256:0fafc4dd967a4e93a6bcfd2a107b6c35eebe0ac78b7746ee6e8ae7dc97c736e5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/TJRD3TS4OXRL6N4FRCBE5465L4/bundle.json","state_url":"https://pith.science/pith/TJRD3TS4OXRL6N4FRCBE5465L4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/TJRD3TS4OXRL6N4FRCBE5465L4/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":"2026-08-07T08:21:01Z","links":{"resolver":"https://pith.science/pith/TJRD3TS4OXRL6N4FRCBE5465L4","bundle":"https://pith.science/pith/TJRD3TS4OXRL6N4FRCBE5465L4/bundle.json","state":"https://pith.science/pith/TJRD3TS4OXRL6N4FRCBE5465L4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/TJRD3TS4OXRL6N4FRCBE5465L4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:TJRD3TS4OXRL6N4FRCBE5465L4","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":"059fd1c5d031722b273673e332635453924a5bcdf8bcfa8f4ec2cf10afa8871b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2025-07-23T05:28:22Z","title_canon_sha256":"fe4a3ea50eb393b0e9c4c017a4921074bf3c77dddae77de98c268638434b7a72"},"schema_version":"1.0","source":{"id":"2507.17217","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2507.17217","created_at":"2026-07-05T11:42:03Z"},{"alias_kind":"arxiv_version","alias_value":"2507.17217v1","created_at":"2026-07-05T11:42:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2507.17217","created_at":"2026-07-05T11:42:03Z"},{"alias_kind":"pith_short_12","alias_value":"TJRD3TS4OXRL","created_at":"2026-07-05T11:42:03Z"},{"alias_kind":"pith_short_16","alias_value":"TJRD3TS4OXRL6N4F","created_at":"2026-07-05T11:42:03Z"},{"alias_kind":"pith_short_8","alias_value":"TJRD3TS4","created_at":"2026-07-05T11:42:03Z"}],"graph_snapshots":[{"event_id":"sha256:0fafc4dd967a4e93a6bcfd2a107b6c35eebe0ac78b7746ee6e8ae7dc97c736e5","target":"graph","created_at":"2026-07-05T11:42:03Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2507.17217/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"This paper investigates the observable properties of a Kerr-Sen black hole surrounded by a thin accretion disk, focusing on the impact of the black hole's spin and charge on the image. Using ray-tracing techniques, we conduct a detailed analysis of the black hole's image, redshift distribution, and intensity distributions at different observation frequencies. The results demonstrate that spin has a more significant effect on the distortion of the inner shadow than charge, and the observer's inclination angle plays a critical role in shaping the redshift distribution, especially near the innerm","authors_text":"Bo-Feng Wu, Li-Fang Li, Pei Wang, Qing-Quan Jiang, Sen Guo, Wen-Hao Deng, Zhan-Feng Mai","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2025-07-23T05:28:22Z","title":"Optical images of the Kerr-Sen black hole and thin accretion disk"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2507.17217","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:d72fcb31431fb9d4f771f8784bf3f73032c15b1e187674f61465458d10bfd9c2","target":"record","created_at":"2026-07-05T11:42:03Z","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":"059fd1c5d031722b273673e332635453924a5bcdf8bcfa8f4ec2cf10afa8871b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2025-07-23T05:28:22Z","title_canon_sha256":"fe4a3ea50eb393b0e9c4c017a4921074bf3c77dddae77de98c268638434b7a72"},"schema_version":"1.0","source":{"id":"2507.17217","kind":"arxiv","version":1}},"canonical_sha256":"9a623dce5c75e2bf378588824ef3dd5f2678109a21c3914843ed3195323199ee","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9a623dce5c75e2bf378588824ef3dd5f2678109a21c3914843ed3195323199ee","first_computed_at":"2026-07-05T11:42:03.672243Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:42:03.672243Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"zgo+C26fWIGXyYWN+O9qstN9X7JeURO/UD2HmwWBhqsHq6IYfUzV63h6iHfKWIyb1/yro0XALu+6ZEbhzQ+IDg==","signature_status":"signed_v1","signed_at":"2026-07-05T11:42:03.672754Z","signed_message":"canonical_sha256_bytes"},"source_id":"2507.17217","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d72fcb31431fb9d4f771f8784bf3f73032c15b1e187674f61465458d10bfd9c2","sha256:0fafc4dd967a4e93a6bcfd2a107b6c35eebe0ac78b7746ee6e8ae7dc97c736e5"],"state_sha256":"63265a08696db2326b4dc235155f3bdd0936145cd5f6eb57aabd56c28733eff5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RY8M7rbPxCgMwKAHoyCrY39F8bXgvb1g7hlrzKWi7jwzzwsG6OgbIq6lSKQNAhxF7cDwhNs4bsuU7VCp9T/PDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-07T08:21:01.354814Z","bundle_sha256":"7a3ec448b4eac54848c3ad10f41fd3a494d4868098b7c091fef4c248a5fa369e"}}