{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:63DFGYAWD2VZUJQMEX2TCIYV3V","short_pith_number":"pith:63DFGYAW","canonical_record":{"source":{"id":"1307.4021","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2013-07-15T17:09:03Z","cross_cats_sorted":["hep-th"],"title_canon_sha256":"3dcc6d7fdf61967d752deee7679b41fb3f09f6e1cebbefb29a513f9731144496","abstract_canon_sha256":"526bf1e711934fd5ed7d127856764fd40cf444797e282ef294e6e133bfaed3bd"},"schema_version":"1.0"},"canonical_sha256":"f6c65360161eab9a260c25f5312315dd711a690e3a2115db138c625a6f7b8683","source":{"kind":"arxiv","id":"1307.4021","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1307.4021","created_at":"2026-05-18T03:06:03Z"},{"alias_kind":"arxiv_version","alias_value":"1307.4021v2","created_at":"2026-05-18T03:06:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1307.4021","created_at":"2026-05-18T03:06:03Z"},{"alias_kind":"pith_short_12","alias_value":"63DFGYAWD2VZ","created_at":"2026-05-18T12:27:34Z"},{"alias_kind":"pith_short_16","alias_value":"63DFGYAWD2VZUJQM","created_at":"2026-05-18T12:27:34Z"},{"alias_kind":"pith_short_8","alias_value":"63DFGYAW","created_at":"2026-05-18T12:27:34Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:63DFGYAWD2VZUJQMEX2TCIYV3V","target":"record","payload":{"canonical_record":{"source":{"id":"1307.4021","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2013-07-15T17:09:03Z","cross_cats_sorted":["hep-th"],"title_canon_sha256":"3dcc6d7fdf61967d752deee7679b41fb3f09f6e1cebbefb29a513f9731144496","abstract_canon_sha256":"526bf1e711934fd5ed7d127856764fd40cf444797e282ef294e6e133bfaed3bd"},"schema_version":"1.0"},"canonical_sha256":"f6c65360161eab9a260c25f5312315dd711a690e3a2115db138c625a6f7b8683","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:06:03.077551Z","signature_b64":"vW//lEFXmE8G6ZVS/ckaIM4BuZukjyCluuYHYo/Nzhhp4pBiUbunwShqOo/KQevuTelQ3K6HmmeCjrPNUWY6Cg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f6c65360161eab9a260c25f5312315dd711a690e3a2115db138c625a6f7b8683","last_reissued_at":"2026-05-18T03:06:03.077032Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:06:03.077032Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1307.4021","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":"2026-05-18T03:06:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ybhrxJSK50wMMQ2M+WwTkRGGr2qQz2SZokrXih443e0kFfKmVTGkyG3si95WLkO4+h4psFj4/XOZFFOd3FUwDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-23T05:22:00.541884Z"},"content_sha256":"82894d4a9819ea77da9e51da9da53ba5facdad8f22ad111fa9401454809c4597","schema_version":"1.0","event_id":"sha256:82894d4a9819ea77da9e51da9da53ba5facdad8f22ad111fa9401454809c4597"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:63DFGYAWD2VZUJQMEX2TCIYV3V","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"C-metric with a conformally coupled scalar field in a magnetic universe","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-th"],"primary_cat":"gr-qc","authors_text":"Marco Astorino","submitted_at":"2013-07-15T17:09:03Z","abstract_excerpt":"In Einstein-Maxwell gravity with a conformally coupled scalar field, the black hole found by Bocharova, Bronnikov, Melnikov, and Bekenstein breaks when embedded in the external magnetic field of the Melvin universe. The situation improves in presence of acceleration, allowing one to build magnetised and accelerating BBMB black hole with a thin membrane. But to overcome this and others disadvantages of BBMB spacetimes, a new class of black holes, including the rotating case, is proposed for the conformal matter coupling under consideration."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1307.4021","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":"2026-05-18T03:06:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"n4UB8k/SoO/IcnCo+n1lyOat1eGg35qkCpQSgYnP7mRwscLoruJjQzRooIMCVPp8biOvjoJJ4dqxjwJjzAmvAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-23T05:22:00.542619Z"},"content_sha256":"62d2a37358feb20b56cb3161adee7e2f9d4b47aa46599671f3911ae2d244c969","schema_version":"1.0","event_id":"sha256:62d2a37358feb20b56cb3161adee7e2f9d4b47aa46599671f3911ae2d244c969"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/63DFGYAWD2VZUJQMEX2TCIYV3V/bundle.json","state_url":"https://pith.science/pith/63DFGYAWD2VZUJQMEX2TCIYV3V/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/63DFGYAWD2VZUJQMEX2TCIYV3V/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":"2026-05-23T05:22:00Z","links":{"resolver":"https://pith.science/pith/63DFGYAWD2VZUJQMEX2TCIYV3V","bundle":"https://pith.science/pith/63DFGYAWD2VZUJQMEX2TCIYV3V/bundle.json","state":"https://pith.science/pith/63DFGYAWD2VZUJQMEX2TCIYV3V/state.json","well_known_bundle":"https://pith.science/.well-known/pith/63DFGYAWD2VZUJQMEX2TCIYV3V/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:63DFGYAWD2VZUJQMEX2TCIYV3V","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":"526bf1e711934fd5ed7d127856764fd40cf444797e282ef294e6e133bfaed3bd","cross_cats_sorted":["hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2013-07-15T17:09:03Z","title_canon_sha256":"3dcc6d7fdf61967d752deee7679b41fb3f09f6e1cebbefb29a513f9731144496"},"schema_version":"1.0","source":{"id":"1307.4021","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1307.4021","created_at":"2026-05-18T03:06:03Z"},{"alias_kind":"arxiv_version","alias_value":"1307.4021v2","created_at":"2026-05-18T03:06:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1307.4021","created_at":"2026-05-18T03:06:03Z"},{"alias_kind":"pith_short_12","alias_value":"63DFGYAWD2VZ","created_at":"2026-05-18T12:27:34Z"},{"alias_kind":"pith_short_16","alias_value":"63DFGYAWD2VZUJQM","created_at":"2026-05-18T12:27:34Z"},{"alias_kind":"pith_short_8","alias_value":"63DFGYAW","created_at":"2026-05-18T12:27:34Z"}],"graph_snapshots":[{"event_id":"sha256:62d2a37358feb20b56cb3161adee7e2f9d4b47aa46599671f3911ae2d244c969","target":"graph","created_at":"2026-05-18T03:06:03Z","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":"In Einstein-Maxwell gravity with a conformally coupled scalar field, the black hole found by Bocharova, Bronnikov, Melnikov, and Bekenstein breaks when embedded in the external magnetic field of the Melvin universe. The situation improves in presence of acceleration, allowing one to build magnetised and accelerating BBMB black hole with a thin membrane. But to overcome this and others disadvantages of BBMB spacetimes, a new class of black holes, including the rotating case, is proposed for the conformal matter coupling under consideration.","authors_text":"Marco Astorino","cross_cats":["hep-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2013-07-15T17:09:03Z","title":"C-metric with a conformally coupled scalar field in a magnetic universe"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1307.4021","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":"sha256:82894d4a9819ea77da9e51da9da53ba5facdad8f22ad111fa9401454809c4597","target":"record","created_at":"2026-05-18T03:06:03Z","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":"526bf1e711934fd5ed7d127856764fd40cf444797e282ef294e6e133bfaed3bd","cross_cats_sorted":["hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2013-07-15T17:09:03Z","title_canon_sha256":"3dcc6d7fdf61967d752deee7679b41fb3f09f6e1cebbefb29a513f9731144496"},"schema_version":"1.0","source":{"id":"1307.4021","kind":"arxiv","version":2}},"canonical_sha256":"f6c65360161eab9a260c25f5312315dd711a690e3a2115db138c625a6f7b8683","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f6c65360161eab9a260c25f5312315dd711a690e3a2115db138c625a6f7b8683","first_computed_at":"2026-05-18T03:06:03.077032Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:06:03.077032Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"vW//lEFXmE8G6ZVS/ckaIM4BuZukjyCluuYHYo/Nzhhp4pBiUbunwShqOo/KQevuTelQ3K6HmmeCjrPNUWY6Cg==","signature_status":"signed_v1","signed_at":"2026-05-18T03:06:03.077551Z","signed_message":"canonical_sha256_bytes"},"source_id":"1307.4021","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:82894d4a9819ea77da9e51da9da53ba5facdad8f22ad111fa9401454809c4597","sha256:62d2a37358feb20b56cb3161adee7e2f9d4b47aa46599671f3911ae2d244c969"],"state_sha256":"2250caee8828663275a36c826841ec53e2dfd4628d6d80970ac3f4c4b3380e9f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+p8e5E1uHClDSDeQs8h7dFUCCG0cW362X77A7tjOe66Kep6872hszm7VfLqYZRf7q/1/AghVvKPFymzsILPWCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-23T05:22:00.548265Z","bundle_sha256":"42e6dc463dfa3b2ccbcd969d78643d753adf8ca84b4b3a1597cad2ef4261b2f3"}}