{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:UCXCMGQEDRSXXICCUCSCLERKOL","short_pith_number":"pith:UCXCMGQE","canonical_record":{"source":{"id":"2408.10303","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2024-08-19T18:00:01Z","cross_cats_sorted":["astro-ph.CO","astro-ph.HE"],"title_canon_sha256":"80b3b755b1431df45bfad21385352f900e6cffc1635ba78eda4184cafa47e900","abstract_canon_sha256":"61d3d27a710c71e7a6179c0b2f6332bfbc53aa63faa6d4d6711a3f7fdebe7488"},"schema_version":"1.0"},"canonical_sha256":"a0ae261a041c657ba042a0a425922a72cbf1572229a38476f874f353a0917942","source":{"kind":"arxiv","id":"2408.10303","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2408.10303","created_at":"2026-07-05T11:11:20Z"},{"alias_kind":"arxiv_version","alias_value":"2408.10303v3","created_at":"2026-07-05T11:11:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2408.10303","created_at":"2026-07-05T11:11:20Z"},{"alias_kind":"pith_short_12","alias_value":"UCXCMGQEDRSX","created_at":"2026-07-05T11:11:20Z"},{"alias_kind":"pith_short_16","alias_value":"UCXCMGQEDRSXXICC","created_at":"2026-07-05T11:11:20Z"},{"alias_kind":"pith_short_8","alias_value":"UCXCMGQE","created_at":"2026-07-05T11:11:20Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:UCXCMGQEDRSXXICCUCSCLERKOL","target":"record","payload":{"canonical_record":{"source":{"id":"2408.10303","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2024-08-19T18:00:01Z","cross_cats_sorted":["astro-ph.CO","astro-ph.HE"],"title_canon_sha256":"80b3b755b1431df45bfad21385352f900e6cffc1635ba78eda4184cafa47e900","abstract_canon_sha256":"61d3d27a710c71e7a6179c0b2f6332bfbc53aa63faa6d4d6711a3f7fdebe7488"},"schema_version":"1.0"},"canonical_sha256":"a0ae261a041c657ba042a0a425922a72cbf1572229a38476f874f353a0917942","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:11:20.549243Z","signature_b64":"VZoIzP1ntDrJqKlDLf+RnueS8aQiDM7tlcS04ziD4fSVyeYfLRGuLeoO9NtZazs3lg9xQBxT2diy7+GuoqtkBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a0ae261a041c657ba042a0a425922a72cbf1572229a38476f874f353a0917942","last_reissued_at":"2026-07-05T11:11:20.548749Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:11:20.548749Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2408.10303","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T11:11:20Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3zv81Ka0Q+mZTecAYJ5z4odOu8Vj7BBbikliejAt6f8td4l7GiwLBORWBfDr6wc+SX3oesNMauGDuRB8Ev8nDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T20:10:41.092696Z"},"content_sha256":"2a8fcecf9f287d407c27aab57e876cdad362f537d04f686f7c60b212716edd00","schema_version":"1.0","event_id":"sha256:2a8fcecf9f287d407c27aab57e876cdad362f537d04f686f7c60b212716edd00"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:UCXCMGQEDRSXXICCUCSCLERKOL","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Dynamical Lensing Tomography of Black Hole Ringdown","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO","astro-ph.HE"],"primary_cat":"gr-qc","authors_text":"Vitor Cardoso, Yifan Chen, Zhen Zhong","submitted_at":"2024-08-19T18:00:01Z","abstract_excerpt":"Strong gravitational lensing occurs when photons pass through the vicinity of a black hole. We investigate this phenomenon in the context of a gravitational-wave event, specifically when a black hole is settling into its final state. The deflection angle of photons mimics the ringdown pattern of the gravitational wave at intermediate times. At late times it has an inverse cubic dependence on observation time. The deviation angle increases exponentially as photons approach the photon ring orbit, reflecting its unstable nature. Our findings are directly applicable to imaging scenarios involving "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2408.10303","kind":"arxiv","version":3},"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/2408.10303/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":"2026-07-05T11:11:20Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Z5DSIDIEzEwBup9BFzmJm3XrkFB0Hh/Dc9jJT42qoE2ktTPPzmfzSNKRT+gMKOu61ZAiSn4LagmKaaAJeDWKBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T20:10:41.093611Z"},"content_sha256":"474646ee9652e50d00432a81e2f7bd01684880c9cda72739a13c62793cfa8ab5","schema_version":"1.0","event_id":"sha256:474646ee9652e50d00432a81e2f7bd01684880c9cda72739a13c62793cfa8ab5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UCXCMGQEDRSXXICCUCSCLERKOL/bundle.json","state_url":"https://pith.science/pith/UCXCMGQEDRSXXICCUCSCLERKOL/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UCXCMGQEDRSXXICCUCSCLERKOL/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":"2026-08-10T20:10:41Z","links":{"resolver":"https://pith.science/pith/UCXCMGQEDRSXXICCUCSCLERKOL","bundle":"https://pith.science/pith/UCXCMGQEDRSXXICCUCSCLERKOL/bundle.json","state":"https://pith.science/pith/UCXCMGQEDRSXXICCUCSCLERKOL/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UCXCMGQEDRSXXICCUCSCLERKOL/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:UCXCMGQEDRSXXICCUCSCLERKOL","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":"61d3d27a710c71e7a6179c0b2f6332bfbc53aa63faa6d4d6711a3f7fdebe7488","cross_cats_sorted":["astro-ph.CO","astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2024-08-19T18:00:01Z","title_canon_sha256":"80b3b755b1431df45bfad21385352f900e6cffc1635ba78eda4184cafa47e900"},"schema_version":"1.0","source":{"id":"2408.10303","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2408.10303","created_at":"2026-07-05T11:11:20Z"},{"alias_kind":"arxiv_version","alias_value":"2408.10303v3","created_at":"2026-07-05T11:11:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2408.10303","created_at":"2026-07-05T11:11:20Z"},{"alias_kind":"pith_short_12","alias_value":"UCXCMGQEDRSX","created_at":"2026-07-05T11:11:20Z"},{"alias_kind":"pith_short_16","alias_value":"UCXCMGQEDRSXXICC","created_at":"2026-07-05T11:11:20Z"},{"alias_kind":"pith_short_8","alias_value":"UCXCMGQE","created_at":"2026-07-05T11:11:20Z"}],"graph_snapshots":[{"event_id":"sha256:474646ee9652e50d00432a81e2f7bd01684880c9cda72739a13c62793cfa8ab5","target":"graph","created_at":"2026-07-05T11:11:20Z","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/2408.10303/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Strong gravitational lensing occurs when photons pass through the vicinity of a black hole. We investigate this phenomenon in the context of a gravitational-wave event, specifically when a black hole is settling into its final state. The deflection angle of photons mimics the ringdown pattern of the gravitational wave at intermediate times. At late times it has an inverse cubic dependence on observation time. The deviation angle increases exponentially as photons approach the photon ring orbit, reflecting its unstable nature. Our findings are directly applicable to imaging scenarios involving ","authors_text":"Vitor Cardoso, Yifan Chen, Zhen Zhong","cross_cats":["astro-ph.CO","astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2024-08-19T18:00:01Z","title":"Dynamical Lensing Tomography of Black Hole Ringdown"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2408.10303","kind":"arxiv","version":3},"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":"sha256:2a8fcecf9f287d407c27aab57e876cdad362f537d04f686f7c60b212716edd00","target":"record","created_at":"2026-07-05T11:11:20Z","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":"61d3d27a710c71e7a6179c0b2f6332bfbc53aa63faa6d4d6711a3f7fdebe7488","cross_cats_sorted":["astro-ph.CO","astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2024-08-19T18:00:01Z","title_canon_sha256":"80b3b755b1431df45bfad21385352f900e6cffc1635ba78eda4184cafa47e900"},"schema_version":"1.0","source":{"id":"2408.10303","kind":"arxiv","version":3}},"canonical_sha256":"a0ae261a041c657ba042a0a425922a72cbf1572229a38476f874f353a0917942","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a0ae261a041c657ba042a0a425922a72cbf1572229a38476f874f353a0917942","first_computed_at":"2026-07-05T11:11:20.548749Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:11:20.548749Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"VZoIzP1ntDrJqKlDLf+RnueS8aQiDM7tlcS04ziD4fSVyeYfLRGuLeoO9NtZazs3lg9xQBxT2diy7+GuoqtkBQ==","signature_status":"signed_v1","signed_at":"2026-07-05T11:11:20.549243Z","signed_message":"canonical_sha256_bytes"},"source_id":"2408.10303","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2a8fcecf9f287d407c27aab57e876cdad362f537d04f686f7c60b212716edd00","sha256:474646ee9652e50d00432a81e2f7bd01684880c9cda72739a13c62793cfa8ab5"],"state_sha256":"60a614525fd923b371bf5228bb1d7e3020fca1f9a32c65494354a9f819279931"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Wo1OMhkQ6f45nl7aKOLl4nfzDo1Iylu1QcKsdUo/O0DqH4da5FYVobrUV712uz1QgVRDKUIfk0z8I3MwFSHAAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-10T20:10:41.099298Z","bundle_sha256":"da826c49dadd3a6b789bb0c6191e76b63f4203b58c7e10e547eb6a2127e02c80"}}