{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:UYEZ4HTMU5YYULPCS7AVF5MLGV","short_pith_number":"pith:UYEZ4HTM","canonical_record":{"source":{"id":"1412.8068","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2014-12-27T16:46:12Z","cross_cats_sorted":[],"title_canon_sha256":"45dd79261e8d29a8c2613b5c0c1416aa04e47bf80af98e5d5ad136a24ad565d6","abstract_canon_sha256":"2306ea3f84b7c52fd48f77da1dcbb28269301582534852a65f1dbdb1a05639bc"},"schema_version":"1.0"},"canonical_sha256":"a6099e1e6ca7718a2de297c152f58b3555c0f3fc4c46cac04eaa372d995ab21f","source":{"kind":"arxiv","id":"1412.8068","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1412.8068","created_at":"2026-05-18T02:30:24Z"},{"alias_kind":"arxiv_version","alias_value":"1412.8068v1","created_at":"2026-05-18T02:30:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1412.8068","created_at":"2026-05-18T02:30:24Z"},{"alias_kind":"pith_short_12","alias_value":"UYEZ4HTMU5YY","created_at":"2026-05-18T12:28:52Z"},{"alias_kind":"pith_short_16","alias_value":"UYEZ4HTMU5YYULPC","created_at":"2026-05-18T12:28:52Z"},{"alias_kind":"pith_short_8","alias_value":"UYEZ4HTM","created_at":"2026-05-18T12:28:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:UYEZ4HTMU5YYULPCS7AVF5MLGV","target":"record","payload":{"canonical_record":{"source":{"id":"1412.8068","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2014-12-27T16:46:12Z","cross_cats_sorted":[],"title_canon_sha256":"45dd79261e8d29a8c2613b5c0c1416aa04e47bf80af98e5d5ad136a24ad565d6","abstract_canon_sha256":"2306ea3f84b7c52fd48f77da1dcbb28269301582534852a65f1dbdb1a05639bc"},"schema_version":"1.0"},"canonical_sha256":"a6099e1e6ca7718a2de297c152f58b3555c0f3fc4c46cac04eaa372d995ab21f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:30:24.276076Z","signature_b64":"8Owsd0LScZ3GdD7wKPqux6+bhOLRYrebDKXoOktGyAZzWvOUC5zbUaiI4lBjHSL8i8716heZ71lIdQbd143bAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a6099e1e6ca7718a2de297c152f58b3555c0f3fc4c46cac04eaa372d995ab21f","last_reissued_at":"2026-05-18T02:30:24.275579Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:30:24.275579Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1412.8068","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":"2026-05-18T02:30:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"62Tg/y7sK4Uapn8vaARUjALY3fpn491qTsHXb3Ekc7MZDPTm1mWNofDxm1tEwD8Am8lWPEG6VFj75DMLBPHTBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T10:21:14.202340Z"},"content_sha256":"943099251cceab2a38086e24b4617dec2813763dec220f4b783195af6bfd8673","schema_version":"1.0","event_id":"sha256:943099251cceab2a38086e24b4617dec2813763dec220f4b783195af6bfd8673"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:UYEZ4HTMU5YYULPCS7AVF5MLGV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Wavefronts and Light Cones for Kerr Spacetimes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Daria Adis, Francisco Frutos-Alfaro, Frank Grave, Thomas Mueller","submitted_at":"2014-12-27T16:46:12Z","abstract_excerpt":"We investigate the light propagation by means of simulations of wavefronts and light cones for Kerr spacetimes. Simulations of this kind give us a new insight to better understand the light propagation in presence of massive rotating black holes. A relevant result is that wavefronts are back scattered with winding around the black hole. To generate these visualizations, an interactive computer program with a graphical user interface, called JWFront, was written in Java."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1412.8068","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":""},"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":"2026-05-18T02:30:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QAbFCIVPkWLxSuHA0eQBqEKJ/C8D5yqFHwBwO5IB4rHxt66F6SCGqUBSM6Ud2jfh1pjvLnKmlUJSMBvjYMuJAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T10:21:14.202692Z"},"content_sha256":"a383f70cf6ff9b0807c43f7951c30d3727392a5a4b9f526b3217cf50b5792b86","schema_version":"1.0","event_id":"sha256:a383f70cf6ff9b0807c43f7951c30d3727392a5a4b9f526b3217cf50b5792b86"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UYEZ4HTMU5YYULPCS7AVF5MLGV/bundle.json","state_url":"https://pith.science/pith/UYEZ4HTMU5YYULPCS7AVF5MLGV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UYEZ4HTMU5YYULPCS7AVF5MLGV/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":"2026-06-03T10:21:14Z","links":{"resolver":"https://pith.science/pith/UYEZ4HTMU5YYULPCS7AVF5MLGV","bundle":"https://pith.science/pith/UYEZ4HTMU5YYULPCS7AVF5MLGV/bundle.json","state":"https://pith.science/pith/UYEZ4HTMU5YYULPCS7AVF5MLGV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UYEZ4HTMU5YYULPCS7AVF5MLGV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:UYEZ4HTMU5YYULPCS7AVF5MLGV","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":"2306ea3f84b7c52fd48f77da1dcbb28269301582534852a65f1dbdb1a05639bc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2014-12-27T16:46:12Z","title_canon_sha256":"45dd79261e8d29a8c2613b5c0c1416aa04e47bf80af98e5d5ad136a24ad565d6"},"schema_version":"1.0","source":{"id":"1412.8068","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1412.8068","created_at":"2026-05-18T02:30:24Z"},{"alias_kind":"arxiv_version","alias_value":"1412.8068v1","created_at":"2026-05-18T02:30:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1412.8068","created_at":"2026-05-18T02:30:24Z"},{"alias_kind":"pith_short_12","alias_value":"UYEZ4HTMU5YY","created_at":"2026-05-18T12:28:52Z"},{"alias_kind":"pith_short_16","alias_value":"UYEZ4HTMU5YYULPC","created_at":"2026-05-18T12:28:52Z"},{"alias_kind":"pith_short_8","alias_value":"UYEZ4HTM","created_at":"2026-05-18T12:28:52Z"}],"graph_snapshots":[{"event_id":"sha256:a383f70cf6ff9b0807c43f7951c30d3727392a5a4b9f526b3217cf50b5792b86","target":"graph","created_at":"2026-05-18T02:30:24Z","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":"We investigate the light propagation by means of simulations of wavefronts and light cones for Kerr spacetimes. Simulations of this kind give us a new insight to better understand the light propagation in presence of massive rotating black holes. A relevant result is that wavefronts are back scattered with winding around the black hole. To generate these visualizations, an interactive computer program with a graphical user interface, called JWFront, was written in Java.","authors_text":"Daria Adis, Francisco Frutos-Alfaro, Frank Grave, Thomas Mueller","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2014-12-27T16:46:12Z","title":"Wavefronts and Light Cones for Kerr Spacetimes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1412.8068","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":"sha256:943099251cceab2a38086e24b4617dec2813763dec220f4b783195af6bfd8673","target":"record","created_at":"2026-05-18T02:30:24Z","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":"2306ea3f84b7c52fd48f77da1dcbb28269301582534852a65f1dbdb1a05639bc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2014-12-27T16:46:12Z","title_canon_sha256":"45dd79261e8d29a8c2613b5c0c1416aa04e47bf80af98e5d5ad136a24ad565d6"},"schema_version":"1.0","source":{"id":"1412.8068","kind":"arxiv","version":1}},"canonical_sha256":"a6099e1e6ca7718a2de297c152f58b3555c0f3fc4c46cac04eaa372d995ab21f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a6099e1e6ca7718a2de297c152f58b3555c0f3fc4c46cac04eaa372d995ab21f","first_computed_at":"2026-05-18T02:30:24.275579Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:30:24.275579Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"8Owsd0LScZ3GdD7wKPqux6+bhOLRYrebDKXoOktGyAZzWvOUC5zbUaiI4lBjHSL8i8716heZ71lIdQbd143bAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:30:24.276076Z","signed_message":"canonical_sha256_bytes"},"source_id":"1412.8068","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:943099251cceab2a38086e24b4617dec2813763dec220f4b783195af6bfd8673","sha256:a383f70cf6ff9b0807c43f7951c30d3727392a5a4b9f526b3217cf50b5792b86"],"state_sha256":"5f1fb1fa32241fe22d3adcdb3d48de7347855d8a24d38b3936cdeeeea53e7809"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jp5qNKIRWCp0BWTgXqKuAlEoRTFZ32LYo7wxtgGjLRRF99UviqjJBL+kJeFBF3mpOghxSqHmj+nI1bUlI4KRDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T10:21:14.204753Z","bundle_sha256":"a9247855cf7327e9e280de14c3cd3140b5d7dc19bd5144cfca8b33b9a059d965"}}