{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:PPJ6ISRLLCFLTVTMQV7VETOVFK","short_pith_number":"pith:PPJ6ISRL","canonical_record":{"source":{"id":"1302.1491","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.gen-ph","submitted_at":"2013-02-01T19:15:35Z","cross_cats_sorted":[],"title_canon_sha256":"8d8f5e2ab375f4682751253c546125f8d0935d98fbaf385e9ae8008412725779","abstract_canon_sha256":"5ce8b27baa6de62249df75e18e8a2690f2946df26da202a7dc79f425a9adc2c2"},"schema_version":"1.0"},"canonical_sha256":"7bd3e44a2b588ab9d66c857f524dd52a9835e86e7e81f003e35f60e9d607718f","source":{"kind":"arxiv","id":"1302.1491","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1302.1491","created_at":"2026-05-18T03:34:24Z"},{"alias_kind":"arxiv_version","alias_value":"1302.1491v1","created_at":"2026-05-18T03:34:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1302.1491","created_at":"2026-05-18T03:34:24Z"},{"alias_kind":"pith_short_12","alias_value":"PPJ6ISRLLCFL","created_at":"2026-05-18T12:27:54Z"},{"alias_kind":"pith_short_16","alias_value":"PPJ6ISRLLCFLTVTM","created_at":"2026-05-18T12:27:54Z"},{"alias_kind":"pith_short_8","alias_value":"PPJ6ISRL","created_at":"2026-05-18T12:27:54Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:PPJ6ISRLLCFLTVTMQV7VETOVFK","target":"record","payload":{"canonical_record":{"source":{"id":"1302.1491","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.gen-ph","submitted_at":"2013-02-01T19:15:35Z","cross_cats_sorted":[],"title_canon_sha256":"8d8f5e2ab375f4682751253c546125f8d0935d98fbaf385e9ae8008412725779","abstract_canon_sha256":"5ce8b27baa6de62249df75e18e8a2690f2946df26da202a7dc79f425a9adc2c2"},"schema_version":"1.0"},"canonical_sha256":"7bd3e44a2b588ab9d66c857f524dd52a9835e86e7e81f003e35f60e9d607718f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:34:24.118470Z","signature_b64":"SdtL5nTydTlDERSJ0bI746saZMcbG+BMJYLY472+Ir7kJjOzZAvsir3hQA89rUvbOLh2PufEJjgR3pSrExU6Dw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7bd3e44a2b588ab9d66c857f524dd52a9835e86e7e81f003e35f60e9d607718f","last_reissued_at":"2026-05-18T03:34:24.117917Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:34:24.117917Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1302.1491","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":"2026-05-18T03:34:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PYVtNFJ0qF/7c5IcBOTXxkRrMGa2YMjEIGe5IhmeHADV7zx5ARyh74UcKKPPbXx0bfVZozpamEkjG4i9RE7sBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-24T18:39:56.120228Z"},"content_sha256":"1a26704e8a471c1deceb7b32362784b9387e5b0b5ca8ead31e001db95defaef6","schema_version":"1.0","event_id":"sha256:1a26704e8a471c1deceb7b32362784b9387e5b0b5ca8ead31e001db95defaef6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:PPJ6ISRLLCFLTVTMQV7VETOVFK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Schwarzschild-like metric and a quantum vacuum","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.gen-ph","authors_text":"P. R. Silva","submitted_at":"2013-02-01T19:15:35Z","abstract_excerpt":"A quantum vacuum, represented by a viscous fluid, is added to the Einstein vacuum, surrounding a spherical distribution of mass. This gives as a solution, in spherical coordinates, a Schwarzschild-like metric. The plot of g00 and g11 components of the metric, as a function of the radial coordinate, display the same qualitative behavior as that of the Schwarzschild metric. However, the temperature of the event horizon is equal to the Hawking temperature multiplied by a factor of two, while the entropy is equal to half of the Bekenstein one."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1302.1491","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":"2026-05-18T03:34:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"V7c9SqEy0n1lcCbTDWOqNMS8FnkaIdYrBBbKb91Tvuu5hoi8sRXnGhicHombSgf77SoZutSf9UEHYOknIkMuCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-24T18:39:56.120860Z"},"content_sha256":"ba8a0bfb692215ca71841f4b12cf9c665f350b116e850f1982b3f269ef40b23d","schema_version":"1.0","event_id":"sha256:ba8a0bfb692215ca71841f4b12cf9c665f350b116e850f1982b3f269ef40b23d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PPJ6ISRLLCFLTVTMQV7VETOVFK/bundle.json","state_url":"https://pith.science/pith/PPJ6ISRLLCFLTVTMQV7VETOVFK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PPJ6ISRLLCFLTVTMQV7VETOVFK/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":"2026-06-24T18:39:56Z","links":{"resolver":"https://pith.science/pith/PPJ6ISRLLCFLTVTMQV7VETOVFK","bundle":"https://pith.science/pith/PPJ6ISRLLCFLTVTMQV7VETOVFK/bundle.json","state":"https://pith.science/pith/PPJ6ISRLLCFLTVTMQV7VETOVFK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PPJ6ISRLLCFLTVTMQV7VETOVFK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:PPJ6ISRLLCFLTVTMQV7VETOVFK","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":"5ce8b27baa6de62249df75e18e8a2690f2946df26da202a7dc79f425a9adc2c2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.gen-ph","submitted_at":"2013-02-01T19:15:35Z","title_canon_sha256":"8d8f5e2ab375f4682751253c546125f8d0935d98fbaf385e9ae8008412725779"},"schema_version":"1.0","source":{"id":"1302.1491","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1302.1491","created_at":"2026-05-18T03:34:24Z"},{"alias_kind":"arxiv_version","alias_value":"1302.1491v1","created_at":"2026-05-18T03:34:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1302.1491","created_at":"2026-05-18T03:34:24Z"},{"alias_kind":"pith_short_12","alias_value":"PPJ6ISRLLCFL","created_at":"2026-05-18T12:27:54Z"},{"alias_kind":"pith_short_16","alias_value":"PPJ6ISRLLCFLTVTM","created_at":"2026-05-18T12:27:54Z"},{"alias_kind":"pith_short_8","alias_value":"PPJ6ISRL","created_at":"2026-05-18T12:27:54Z"}],"graph_snapshots":[{"event_id":"sha256:ba8a0bfb692215ca71841f4b12cf9c665f350b116e850f1982b3f269ef40b23d","target":"graph","created_at":"2026-05-18T03:34:24Z","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":"A quantum vacuum, represented by a viscous fluid, is added to the Einstein vacuum, surrounding a spherical distribution of mass. This gives as a solution, in spherical coordinates, a Schwarzschild-like metric. The plot of g00 and g11 components of the metric, as a function of the radial coordinate, display the same qualitative behavior as that of the Schwarzschild metric. However, the temperature of the event horizon is equal to the Hawking temperature multiplied by a factor of two, while the entropy is equal to half of the Bekenstein one.","authors_text":"P. R. Silva","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.gen-ph","submitted_at":"2013-02-01T19:15:35Z","title":"Schwarzschild-like metric and a quantum vacuum"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1302.1491","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":"sha256:1a26704e8a471c1deceb7b32362784b9387e5b0b5ca8ead31e001db95defaef6","target":"record","created_at":"2026-05-18T03:34:24Z","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":"5ce8b27baa6de62249df75e18e8a2690f2946df26da202a7dc79f425a9adc2c2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.gen-ph","submitted_at":"2013-02-01T19:15:35Z","title_canon_sha256":"8d8f5e2ab375f4682751253c546125f8d0935d98fbaf385e9ae8008412725779"},"schema_version":"1.0","source":{"id":"1302.1491","kind":"arxiv","version":1}},"canonical_sha256":"7bd3e44a2b588ab9d66c857f524dd52a9835e86e7e81f003e35f60e9d607718f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7bd3e44a2b588ab9d66c857f524dd52a9835e86e7e81f003e35f60e9d607718f","first_computed_at":"2026-05-18T03:34:24.117917Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:34:24.117917Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"SdtL5nTydTlDERSJ0bI746saZMcbG+BMJYLY472+Ir7kJjOzZAvsir3hQA89rUvbOLh2PufEJjgR3pSrExU6Dw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:34:24.118470Z","signed_message":"canonical_sha256_bytes"},"source_id":"1302.1491","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1a26704e8a471c1deceb7b32362784b9387e5b0b5ca8ead31e001db95defaef6","sha256:ba8a0bfb692215ca71841f4b12cf9c665f350b116e850f1982b3f269ef40b23d"],"state_sha256":"62c0c820a30523457cca77d41f98560469468b80dd620024c489cb1e58085fee"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8qvLmc6Zevca/I5oduMC/IfUwtqxH88OXXpscmTFPfG96uP/NXpB/emuy9EMkHIEVeisCHFWxT0y53ChcYdkDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-24T18:39:56.123823Z","bundle_sha256":"7341402d656129bc99a2bbf94bcea8a88565979d3b61b8e839de4098c0a7312b"}}