{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:2NMHQNKZHMSH4NAVWNZCBL7X3A","short_pith_number":"pith:2NMHQNKZ","canonical_record":{"source":{"id":"1606.04634","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2016-06-15T03:55:47Z","cross_cats_sorted":[],"title_canon_sha256":"1129edcf2ab20fdd2f6c24d45cc97763cba0b034f9b1aa809ab6a86c9165263d","abstract_canon_sha256":"5c97aac2a302cfbe87448472f2982f64c2f3a7743178887bf8432a5e7df083a9"},"schema_version":"1.0"},"canonical_sha256":"d3587835593b247e3415b37220aff7d801e6960ca42a7432f42a1691fdca4fa6","source":{"kind":"arxiv","id":"1606.04634","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1606.04634","created_at":"2026-05-18T01:00:05Z"},{"alias_kind":"arxiv_version","alias_value":"1606.04634v2","created_at":"2026-05-18T01:00:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1606.04634","created_at":"2026-05-18T01:00:05Z"},{"alias_kind":"pith_short_12","alias_value":"2NMHQNKZHMSH","created_at":"2026-05-18T12:29:55Z"},{"alias_kind":"pith_short_16","alias_value":"2NMHQNKZHMSH4NAV","created_at":"2026-05-18T12:29:55Z"},{"alias_kind":"pith_short_8","alias_value":"2NMHQNKZ","created_at":"2026-05-18T12:29:55Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:2NMHQNKZHMSH4NAVWNZCBL7X3A","target":"record","payload":{"canonical_record":{"source":{"id":"1606.04634","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2016-06-15T03:55:47Z","cross_cats_sorted":[],"title_canon_sha256":"1129edcf2ab20fdd2f6c24d45cc97763cba0b034f9b1aa809ab6a86c9165263d","abstract_canon_sha256":"5c97aac2a302cfbe87448472f2982f64c2f3a7743178887bf8432a5e7df083a9"},"schema_version":"1.0"},"canonical_sha256":"d3587835593b247e3415b37220aff7d801e6960ca42a7432f42a1691fdca4fa6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:00:05.727834Z","signature_b64":"Q0s2nEBZemL4OrqSutVjXTNU+StB1ScSMbNOt6LTAxhxkARJVWksyu1SCd6KsL49RsMnrhDugVdUYiwWkk1MBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d3587835593b247e3415b37220aff7d801e6960ca42a7432f42a1691fdca4fa6","last_reissued_at":"2026-05-18T01:00:05.727328Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:00:05.727328Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1606.04634","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:00:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Di5TPFpxvfEecKPvv609lJ86jWOPZ1+CAKQ/qp8tqnArMT+2XeEVvCW6Z/MKTd491TE3SqmoT9N/U7NVmqQkDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T21:44:50.915859Z"},"content_sha256":"98a8a0e1404409e1ea86b902eefa2d3f82a46d91f8f4f6637ddc62dd6077a45e","schema_version":"1.0","event_id":"sha256:98a8a0e1404409e1ea86b902eefa2d3f82a46d91f8f4f6637ddc62dd6077a45e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:2NMHQNKZHMSH4NAVWNZCBL7X3A","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Double shadow of a regular phantom black hole as photons couple to Weyl tensor","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Jiliang Jing, Songbai Chen, Yang Huang","submitted_at":"2016-06-15T03:55:47Z","abstract_excerpt":"We have studied the shadow of a regular phantom black hole as photons couple to Weyl tensor. We find that the coupling yields that photons with different polarization directions propagate along different paths in the spacetime so that there exits double shadow for a black hole, which is quite different from that in the non-coupling case where only a single shadow emerges. The umbra of black hole increases with the phantom charge and decreases with the coupling strength. The dependence of the penumbra on the phantom charge and the coupling strength is converse to that of the umbra. Combining wi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1606.04634","kind":"arxiv","version":2},"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":"2026-05-18T01:00:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8TcsAvCOqyZYBYyeQ7ewbIfJMxMuEuAezDaGcQwZH8D8ak5hPh4dTh9M2qv7sAtTUybZfQppQOJzo3lHpMgKDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T21:44:50.916509Z"},"content_sha256":"86d1d080d67855c3e468c7c44eb1999d9c06c9a9ac1a4e9bcc35b36c7a167ad2","schema_version":"1.0","event_id":"sha256:86d1d080d67855c3e468c7c44eb1999d9c06c9a9ac1a4e9bcc35b36c7a167ad2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2NMHQNKZHMSH4NAVWNZCBL7X3A/bundle.json","state_url":"https://pith.science/pith/2NMHQNKZHMSH4NAVWNZCBL7X3A/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2NMHQNKZHMSH4NAVWNZCBL7X3A/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":"2026-05-27T21:44:50Z","links":{"resolver":"https://pith.science/pith/2NMHQNKZHMSH4NAVWNZCBL7X3A","bundle":"https://pith.science/pith/2NMHQNKZHMSH4NAVWNZCBL7X3A/bundle.json","state":"https://pith.science/pith/2NMHQNKZHMSH4NAVWNZCBL7X3A/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2NMHQNKZHMSH4NAVWNZCBL7X3A/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:2NMHQNKZHMSH4NAVWNZCBL7X3A","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":"5c97aac2a302cfbe87448472f2982f64c2f3a7743178887bf8432a5e7df083a9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2016-06-15T03:55:47Z","title_canon_sha256":"1129edcf2ab20fdd2f6c24d45cc97763cba0b034f9b1aa809ab6a86c9165263d"},"schema_version":"1.0","source":{"id":"1606.04634","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1606.04634","created_at":"2026-05-18T01:00:05Z"},{"alias_kind":"arxiv_version","alias_value":"1606.04634v2","created_at":"2026-05-18T01:00:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1606.04634","created_at":"2026-05-18T01:00:05Z"},{"alias_kind":"pith_short_12","alias_value":"2NMHQNKZHMSH","created_at":"2026-05-18T12:29:55Z"},{"alias_kind":"pith_short_16","alias_value":"2NMHQNKZHMSH4NAV","created_at":"2026-05-18T12:29:55Z"},{"alias_kind":"pith_short_8","alias_value":"2NMHQNKZ","created_at":"2026-05-18T12:29:55Z"}],"graph_snapshots":[{"event_id":"sha256:86d1d080d67855c3e468c7c44eb1999d9c06c9a9ac1a4e9bcc35b36c7a167ad2","target":"graph","created_at":"2026-05-18T01:00:05Z","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 have studied the shadow of a regular phantom black hole as photons couple to Weyl tensor. We find that the coupling yields that photons with different polarization directions propagate along different paths in the spacetime so that there exits double shadow for a black hole, which is quite different from that in the non-coupling case where only a single shadow emerges. The umbra of black hole increases with the phantom charge and decreases with the coupling strength. The dependence of the penumbra on the phantom charge and the coupling strength is converse to that of the umbra. Combining wi","authors_text":"Jiliang Jing, Songbai Chen, Yang Huang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2016-06-15T03:55:47Z","title":"Double shadow of a regular phantom black hole as photons couple to Weyl tensor"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1606.04634","kind":"arxiv","version":2},"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":"sha256:98a8a0e1404409e1ea86b902eefa2d3f82a46d91f8f4f6637ddc62dd6077a45e","target":"record","created_at":"2026-05-18T01:00:05Z","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":"5c97aac2a302cfbe87448472f2982f64c2f3a7743178887bf8432a5e7df083a9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2016-06-15T03:55:47Z","title_canon_sha256":"1129edcf2ab20fdd2f6c24d45cc97763cba0b034f9b1aa809ab6a86c9165263d"},"schema_version":"1.0","source":{"id":"1606.04634","kind":"arxiv","version":2}},"canonical_sha256":"d3587835593b247e3415b37220aff7d801e6960ca42a7432f42a1691fdca4fa6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d3587835593b247e3415b37220aff7d801e6960ca42a7432f42a1691fdca4fa6","first_computed_at":"2026-05-18T01:00:05.727328Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:00:05.727328Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Q0s2nEBZemL4OrqSutVjXTNU+StB1ScSMbNOt6LTAxhxkARJVWksyu1SCd6KsL49RsMnrhDugVdUYiwWkk1MBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:00:05.727834Z","signed_message":"canonical_sha256_bytes"},"source_id":"1606.04634","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:98a8a0e1404409e1ea86b902eefa2d3f82a46d91f8f4f6637ddc62dd6077a45e","sha256:86d1d080d67855c3e468c7c44eb1999d9c06c9a9ac1a4e9bcc35b36c7a167ad2"],"state_sha256":"f55345229e33d6dc728ff5ab3fd3f6b8e042f72728f309e2d845f61920ea3668"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5kUHkpF60NI64nrxq2+7KHTcWmBrzNKF5B4k6D54yOVcREma5KDD+c3rgVhWmG6lP/r42pVCXbQgbZfsDpTDBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T21:44:50.919601Z","bundle_sha256":"c99e8412734b1ec4dc4f9f328c68b40571ebd53dc1e3d21f1464635ba5ee4099"}}