{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:HLCQ2XATWIILYII7XEOJANKY5A","short_pith_number":"pith:HLCQ2XAT","canonical_record":{"source":{"id":"2505.06018","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"gr-qc","submitted_at":"2025-05-09T13:01:33Z","cross_cats_sorted":[],"title_canon_sha256":"cf8f4a2ffe2fabf39dc4b321e04771bb44c11c3746fe93cf44d150513702d0d8","abstract_canon_sha256":"4deab93561831355034f189c17290b319937b59718096eee5bb48cb6210df8cd"},"schema_version":"1.0"},"canonical_sha256":"3ac50d5c13b210bc211fb91c903558e81448ef55eb5d1061a9ebf6d3930ac734","source":{"kind":"arxiv","id":"2505.06018","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2505.06018","created_at":"2026-07-05T11:00:52Z"},{"alias_kind":"arxiv_version","alias_value":"2505.06018v1","created_at":"2026-07-05T11:00:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2505.06018","created_at":"2026-07-05T11:00:52Z"},{"alias_kind":"pith_short_12","alias_value":"HLCQ2XATWIIL","created_at":"2026-07-05T11:00:52Z"},{"alias_kind":"pith_short_16","alias_value":"HLCQ2XATWIILYII7","created_at":"2026-07-05T11:00:52Z"},{"alias_kind":"pith_short_8","alias_value":"HLCQ2XAT","created_at":"2026-07-05T11:00:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:HLCQ2XATWIILYII7XEOJANKY5A","target":"record","payload":{"canonical_record":{"source":{"id":"2505.06018","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"gr-qc","submitted_at":"2025-05-09T13:01:33Z","cross_cats_sorted":[],"title_canon_sha256":"cf8f4a2ffe2fabf39dc4b321e04771bb44c11c3746fe93cf44d150513702d0d8","abstract_canon_sha256":"4deab93561831355034f189c17290b319937b59718096eee5bb48cb6210df8cd"},"schema_version":"1.0"},"canonical_sha256":"3ac50d5c13b210bc211fb91c903558e81448ef55eb5d1061a9ebf6d3930ac734","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:00:52.347277Z","signature_b64":"XuGH2i9cLqiO47OT05/4il1TQeVBGejcuggezsFG174NALzKsZB2yoOL0ZQRayq/1p+nhNCyseUpw+qtmnq9Aw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3ac50d5c13b210bc211fb91c903558e81448ef55eb5d1061a9ebf6d3930ac734","last_reissued_at":"2026-07-05T11:00:52.346701Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:00:52.346701Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2505.06018","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":"2026-07-05T11:00:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tdLrqdYhLsF50wt/YwGnzA8nr7mqKMe20VogJeNhJMZ9KyzkSMY2+pvOSKp2/nuQv469DoMsEJBYp3LP6jyaAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-18T17:36:25.346334Z"},"content_sha256":"674a6e1d2c79fb4d0e7c61fd1e708592af075de369e0f3cd8278611847e199e6","schema_version":"1.0","event_id":"sha256:674a6e1d2c79fb4d0e7c61fd1e708592af075de369e0f3cd8278611847e199e6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:HLCQ2XATWIILYII7XEOJANKY5A","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Black holes as gravitational mirrors","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"C. R. Muniz, F. M. da Silva, L. C. N. Santos, V. B. Bezerra","submitted_at":"2025-05-09T13:01:33Z","abstract_excerpt":"Retrolensing is a gravitational lensing effect in which light emitted by a background source is deflected by a black hole and redirected toward the observer after undergoing nearly complete loops around the black hole. In this context, we explore the possibility of seeing objects of the solar system in past eras through telescope observations by using black holes as a gravitational mirror. We consider the motion of the light around Reissner-Nordstr\\\"om space-time and discuss the properties of the trajectories of boomerang photons. It was shown that, depending on the angle of emission and the p"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2505.06018","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/2505.06018/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":"2026-07-05T11:00:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fy5ZEt0wisg/eZEzyXVcdazZBFwHmYA2E3jSdfQOuvnPpaGq6I4BfLkTumWqe1LFGzzXYL78t1VGfUvuYLAiCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-18T17:36:25.346970Z"},"content_sha256":"03320c6e1246ccbf86c2a7384a221b6e901d514ec1d4af3f29457699b9e26f0e","schema_version":"1.0","event_id":"sha256:03320c6e1246ccbf86c2a7384a221b6e901d514ec1d4af3f29457699b9e26f0e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HLCQ2XATWIILYII7XEOJANKY5A/bundle.json","state_url":"https://pith.science/pith/HLCQ2XATWIILYII7XEOJANKY5A/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HLCQ2XATWIILYII7XEOJANKY5A/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":"2026-08-18T17:36:25Z","links":{"resolver":"https://pith.science/pith/HLCQ2XATWIILYII7XEOJANKY5A","bundle":"https://pith.science/pith/HLCQ2XATWIILYII7XEOJANKY5A/bundle.json","state":"https://pith.science/pith/HLCQ2XATWIILYII7XEOJANKY5A/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HLCQ2XATWIILYII7XEOJANKY5A/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:HLCQ2XATWIILYII7XEOJANKY5A","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":"4deab93561831355034f189c17290b319937b59718096eee5bb48cb6210df8cd","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"gr-qc","submitted_at":"2025-05-09T13:01:33Z","title_canon_sha256":"cf8f4a2ffe2fabf39dc4b321e04771bb44c11c3746fe93cf44d150513702d0d8"},"schema_version":"1.0","source":{"id":"2505.06018","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2505.06018","created_at":"2026-07-05T11:00:52Z"},{"alias_kind":"arxiv_version","alias_value":"2505.06018v1","created_at":"2026-07-05T11:00:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2505.06018","created_at":"2026-07-05T11:00:52Z"},{"alias_kind":"pith_short_12","alias_value":"HLCQ2XATWIIL","created_at":"2026-07-05T11:00:52Z"},{"alias_kind":"pith_short_16","alias_value":"HLCQ2XATWIILYII7","created_at":"2026-07-05T11:00:52Z"},{"alias_kind":"pith_short_8","alias_value":"HLCQ2XAT","created_at":"2026-07-05T11:00:52Z"}],"graph_snapshots":[{"event_id":"sha256:03320c6e1246ccbf86c2a7384a221b6e901d514ec1d4af3f29457699b9e26f0e","target":"graph","created_at":"2026-07-05T11:00:52Z","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/2505.06018/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Retrolensing is a gravitational lensing effect in which light emitted by a background source is deflected by a black hole and redirected toward the observer after undergoing nearly complete loops around the black hole. In this context, we explore the possibility of seeing objects of the solar system in past eras through telescope observations by using black holes as a gravitational mirror. We consider the motion of the light around Reissner-Nordstr\\\"om space-time and discuss the properties of the trajectories of boomerang photons. It was shown that, depending on the angle of emission and the p","authors_text":"C. R. Muniz, F. M. da Silva, L. C. N. Santos, V. B. Bezerra","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"gr-qc","submitted_at":"2025-05-09T13:01:33Z","title":"Black holes as gravitational mirrors"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2505.06018","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":"sha256:674a6e1d2c79fb4d0e7c61fd1e708592af075de369e0f3cd8278611847e199e6","target":"record","created_at":"2026-07-05T11:00:52Z","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":"4deab93561831355034f189c17290b319937b59718096eee5bb48cb6210df8cd","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"gr-qc","submitted_at":"2025-05-09T13:01:33Z","title_canon_sha256":"cf8f4a2ffe2fabf39dc4b321e04771bb44c11c3746fe93cf44d150513702d0d8"},"schema_version":"1.0","source":{"id":"2505.06018","kind":"arxiv","version":1}},"canonical_sha256":"3ac50d5c13b210bc211fb91c903558e81448ef55eb5d1061a9ebf6d3930ac734","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3ac50d5c13b210bc211fb91c903558e81448ef55eb5d1061a9ebf6d3930ac734","first_computed_at":"2026-07-05T11:00:52.346701Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:00:52.346701Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"XuGH2i9cLqiO47OT05/4il1TQeVBGejcuggezsFG174NALzKsZB2yoOL0ZQRayq/1p+nhNCyseUpw+qtmnq9Aw==","signature_status":"signed_v1","signed_at":"2026-07-05T11:00:52.347277Z","signed_message":"canonical_sha256_bytes"},"source_id":"2505.06018","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:674a6e1d2c79fb4d0e7c61fd1e708592af075de369e0f3cd8278611847e199e6","sha256:03320c6e1246ccbf86c2a7384a221b6e901d514ec1d4af3f29457699b9e26f0e"],"state_sha256":"cda23d5b57d40327077f945e48a37681d3fa4a1e00fa8ad86d0fac0823d95ad3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"O1DMEMgneUPDHYkr66qQKKM/n/zv9X07oyPt4CPp5JPrwTSfw+uYjzArFriu2V6TCGrAW6X2urTEwswyKhm5CA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-18T17:36:25.354436Z","bundle_sha256":"31b230658c5708f545c23ec776231979da6c951846be1495c8c217d501ff0a94"}}