{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2024:6B6T52W2VY4R55AKBADW2EZ6KG","short_pith_number":"pith:6B6T52W2","schema_version":"1.0","canonical_sha256":"f07d3eeadaae391ef40a08076d133e5185c0ca849528678739bc55e1a7348c95","source":{"kind":"arxiv","id":"2406.11671","version":1},"attestation_state":"computed","paper":{"title":"The Black Hole Explorer: Using the Photon Ring to Visualize Spacetime Around the Black Hole","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"2), (2) Center for Astrophysics | Harvard, (3) Department of Physics & Astronomy, Alexandru Lupsasca (3), Michael D. Johnson (1, Peter Galison (1), Roman Berens (3) ((1) Black Hole Initiative at Harvard University, Smithsonian, Trevor Gravely (3), Vanderbilt University)","submitted_at":"2024-06-17T15:51:54Z","abstract_excerpt":"The Black Hole Explorer (BHEX), an orbiting, multi-band, millimeter radio-telescope, in hybrid combination with millimeter terrestrial radio-telescopes, is designed to discover and measure the thin photon ring around the supermassive black holes M87* and Sgr A*. As background to the BHEX instruments, this paper explores various aspects of the photon ring, focusing on the intricate flow of light around a spinning black hole, and tracking, through visual simulations, photons as they course along geodesics. Ultimately, the aim of these visualizations is to advance the foundational aims of the BHE"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2406.11671","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2024-06-17T15:51:54Z","cross_cats_sorted":[],"title_canon_sha256":"b3f971af2a754ff1f98a2e31d0d78c5ec9dcf9ff37ec1c1a706c0a2809c91eab","abstract_canon_sha256":"e0ff2924262eb23845c0131e913ae9d4d859612281a5eb6f03c64395329db8ec"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T09:07:29.563050Z","signature_b64":"DeWppnRPU7ESMmiRJH2IVbsPol/6xHn7bHzGpuCeXV6yZaYBL8VOuj5Sko08HyPA13AEK6kNaBB4zz9V7u5MDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f07d3eeadaae391ef40a08076d133e5185c0ca849528678739bc55e1a7348c95","last_reissued_at":"2026-07-05T09:07:29.562596Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T09:07:29.562596Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The Black Hole Explorer: Using the Photon Ring to Visualize Spacetime Around the Black Hole","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"2), (2) Center for Astrophysics | Harvard, (3) Department of Physics & Astronomy, Alexandru Lupsasca (3), Michael D. Johnson (1, Peter Galison (1), Roman Berens (3) ((1) Black Hole Initiative at Harvard University, Smithsonian, Trevor Gravely (3), Vanderbilt University)","submitted_at":"2024-06-17T15:51:54Z","abstract_excerpt":"The Black Hole Explorer (BHEX), an orbiting, multi-band, millimeter radio-telescope, in hybrid combination with millimeter terrestrial radio-telescopes, is designed to discover and measure the thin photon ring around the supermassive black holes M87* and Sgr A*. As background to the BHEX instruments, this paper explores various aspects of the photon ring, focusing on the intricate flow of light around a spinning black hole, and tracking, through visual simulations, photons as they course along geodesics. Ultimately, the aim of these visualizations is to advance the foundational aims of the BHE"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2406.11671","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/2406.11671/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2406.11671","created_at":"2026-07-05T09:07:29.562653+00:00"},{"alias_kind":"arxiv_version","alias_value":"2406.11671v1","created_at":"2026-07-05T09:07:29.562653+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2406.11671","created_at":"2026-07-05T09:07:29.562653+00:00"},{"alias_kind":"pith_short_12","alias_value":"6B6T52W2VY4R","created_at":"2026-07-05T09:07:29.562653+00:00"},{"alias_kind":"pith_short_16","alias_value":"6B6T52W2VY4R55AK","created_at":"2026-07-05T09:07:29.562653+00:00"},{"alias_kind":"pith_short_8","alias_value":"6B6T52W2","created_at":"2026-07-05T09:07:29.562653+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":2,"internal_anchor_count":0,"sample":[{"citing_arxiv_id":"2605.12659","citing_title":"Light Propagation Prescriptions for Black Hole Movies","ref_index":11,"is_internal_anchor":false},{"citing_arxiv_id":"2604.16551","citing_title":"Photon rings and shadows of black holes with non-minimal couplings between curvature and electromagnetic field","ref_index":93,"is_internal_anchor":false}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/6B6T52W2VY4R55AKBADW2EZ6KG","json":"https://pith.science/pith/6B6T52W2VY4R55AKBADW2EZ6KG.json","graph_json":"https://pith.science/api/pith-number/6B6T52W2VY4R55AKBADW2EZ6KG/graph.json","events_json":"https://pith.science/api/pith-number/6B6T52W2VY4R55AKBADW2EZ6KG/events.json","paper":"https://pith.science/paper/6B6T52W2"},"agent_actions":{"view_html":"https://pith.science/pith/6B6T52W2VY4R55AKBADW2EZ6KG","download_json":"https://pith.science/pith/6B6T52W2VY4R55AKBADW2EZ6KG.json","view_paper":"https://pith.science/paper/6B6T52W2","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2406.11671&json=true","fetch_graph":"https://pith.science/api/pith-number/6B6T52W2VY4R55AKBADW2EZ6KG/graph.json","fetch_events":"https://pith.science/api/pith-number/6B6T52W2VY4R55AKBADW2EZ6KG/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/6B6T52W2VY4R55AKBADW2EZ6KG/action/timestamp_anchor","attest_storage":"https://pith.science/pith/6B6T52W2VY4R55AKBADW2EZ6KG/action/storage_attestation","attest_author":"https://pith.science/pith/6B6T52W2VY4R55AKBADW2EZ6KG/action/author_attestation","sign_citation":"https://pith.science/pith/6B6T52W2VY4R55AKBADW2EZ6KG/action/citation_signature","submit_replication":"https://pith.science/pith/6B6T52W2VY4R55AKBADW2EZ6KG/action/replication_record"}},"created_at":"2026-07-05T09:07:29.562653+00:00","updated_at":"2026-07-05T09:07:29.562653+00:00"}