{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:CGAIL2HXI73UIVF4JY7MPZWCVV","short_pith_number":"pith:CGAIL2HX","canonical_record":{"source":{"id":"1905.03045","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2019-05-08T12:45:43Z","cross_cats_sorted":["quant-ph"],"title_canon_sha256":"761f0352e0d8576803112224fc85d3063001a2afbf73292049c11dcb4efd6455","abstract_canon_sha256":"0476c06e47e84dd70b878d2f7ee7f0d7ada9266cf112b979181ecbbaa97b5012"},"schema_version":"1.0"},"canonical_sha256":"118085e8f747f74454bc4e3ec7e6c2ad77094a09861f273aa39cc42b8a233084","source":{"kind":"arxiv","id":"1905.03045","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1905.03045","created_at":"2026-07-05T02:12:22Z"},{"alias_kind":"arxiv_version","alias_value":"1905.03045v2","created_at":"2026-07-05T02:12:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1905.03045","created_at":"2026-07-05T02:12:22Z"},{"alias_kind":"pith_short_12","alias_value":"CGAIL2HXI73U","created_at":"2026-07-05T02:12:22Z"},{"alias_kind":"pith_short_16","alias_value":"CGAIL2HXI73UIVF4","created_at":"2026-07-05T02:12:22Z"},{"alias_kind":"pith_short_8","alias_value":"CGAIL2HX","created_at":"2026-07-05T02:12:22Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:CGAIL2HXI73UIVF4JY7MPZWCVV","target":"record","payload":{"canonical_record":{"source":{"id":"1905.03045","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2019-05-08T12:45:43Z","cross_cats_sorted":["quant-ph"],"title_canon_sha256":"761f0352e0d8576803112224fc85d3063001a2afbf73292049c11dcb4efd6455","abstract_canon_sha256":"0476c06e47e84dd70b878d2f7ee7f0d7ada9266cf112b979181ecbbaa97b5012"},"schema_version":"1.0"},"canonical_sha256":"118085e8f747f74454bc4e3ec7e6c2ad77094a09861f273aa39cc42b8a233084","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:12:22.387224Z","signature_b64":"C4wxcSqxWMsBYX4IY5XbkaQs+sGpj+mCh3vDoB5zxSfypGY9ZGtLBqK4wn6pE9qnPIhYBUH3wnBywOXewagCDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"118085e8f747f74454bc4e3ec7e6c2ad77094a09861f273aa39cc42b8a233084","last_reissued_at":"2026-07-05T02:12:22.386802Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:12:22.386802Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1905.03045","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":"2026-07-05T02:12:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gvg5OxaX+rKPC3bHKP1tna5Iyr5yBipz5S5cmqnzSKxcu7sSdmTyDjWg2qmzLJy7RmXwO3DRlQw120mAjTS6Bw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T19:44:15.149781Z"},"content_sha256":"9f0d0a8ffedbe29469f736bcd171aa2f2fbf27e094648ef38ec416d0b4dc6c9a","schema_version":"1.0","event_id":"sha256:9f0d0a8ffedbe29469f736bcd171aa2f2fbf27e094648ef38ec416d0b4dc6c9a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:CGAIL2HXI73UIVF4JY7MPZWCVV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Backreaction in an analogue black hole experiment","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["quant-ph"],"primary_cat":"gr-qc","authors_text":"Cisco Gooding, Harry Goodhew, Sam Patrick, Silke Weinfurtner","submitted_at":"2019-05-08T12:45:43Z","abstract_excerpt":"In general relativity, the interaction between a black hole and the fields around it (a process known as backreaction) proceeds via the evolution of the black holes mass and angular momentum. Analogue models of gravity, particularly fluid mechanical analogues, have been very successful in mimicking the propagation of fields, and the effects they experience, around black holes. However, hydrodynamic black holes are externally driven systems whose effective mass and angular momentum are set by experimental parameters, and as such no significant internal backreaction processes are expected to tak"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1905.03045","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1905.03045/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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T02:12:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PqmIu6Ihlmd/UL2wG8CGJxQBCp/g2cvr2BbmY7+I+/ywko47x+xKhyF9P8eKWdf9ZqPq6TeKzU/5g9cuVWwMDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T19:44:15.150289Z"},"content_sha256":"180dee9afe8cfb3d8e8a8a305edb9a5bfefd7682f111c5add2438b8488e9da1c","schema_version":"1.0","event_id":"sha256:180dee9afe8cfb3d8e8a8a305edb9a5bfefd7682f111c5add2438b8488e9da1c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CGAIL2HXI73UIVF4JY7MPZWCVV/bundle.json","state_url":"https://pith.science/pith/CGAIL2HXI73UIVF4JY7MPZWCVV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CGAIL2HXI73UIVF4JY7MPZWCVV/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":"2026-08-05T19:44:15Z","links":{"resolver":"https://pith.science/pith/CGAIL2HXI73UIVF4JY7MPZWCVV","bundle":"https://pith.science/pith/CGAIL2HXI73UIVF4JY7MPZWCVV/bundle.json","state":"https://pith.science/pith/CGAIL2HXI73UIVF4JY7MPZWCVV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CGAIL2HXI73UIVF4JY7MPZWCVV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:CGAIL2HXI73UIVF4JY7MPZWCVV","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":"0476c06e47e84dd70b878d2f7ee7f0d7ada9266cf112b979181ecbbaa97b5012","cross_cats_sorted":["quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2019-05-08T12:45:43Z","title_canon_sha256":"761f0352e0d8576803112224fc85d3063001a2afbf73292049c11dcb4efd6455"},"schema_version":"1.0","source":{"id":"1905.03045","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1905.03045","created_at":"2026-07-05T02:12:22Z"},{"alias_kind":"arxiv_version","alias_value":"1905.03045v2","created_at":"2026-07-05T02:12:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1905.03045","created_at":"2026-07-05T02:12:22Z"},{"alias_kind":"pith_short_12","alias_value":"CGAIL2HXI73U","created_at":"2026-07-05T02:12:22Z"},{"alias_kind":"pith_short_16","alias_value":"CGAIL2HXI73UIVF4","created_at":"2026-07-05T02:12:22Z"},{"alias_kind":"pith_short_8","alias_value":"CGAIL2HX","created_at":"2026-07-05T02:12:22Z"}],"graph_snapshots":[{"event_id":"sha256:180dee9afe8cfb3d8e8a8a305edb9a5bfefd7682f111c5add2438b8488e9da1c","target":"graph","created_at":"2026-07-05T02:12:22Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/1905.03045/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"In general relativity, the interaction between a black hole and the fields around it (a process known as backreaction) proceeds via the evolution of the black holes mass and angular momentum. Analogue models of gravity, particularly fluid mechanical analogues, have been very successful in mimicking the propagation of fields, and the effects they experience, around black holes. However, hydrodynamic black holes are externally driven systems whose effective mass and angular momentum are set by experimental parameters, and as such no significant internal backreaction processes are expected to tak","authors_text":"Cisco Gooding, Harry Goodhew, Sam Patrick, Silke Weinfurtner","cross_cats":["quant-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2019-05-08T12:45:43Z","title":"Backreaction in an analogue black hole experiment"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1905.03045","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":"sha256:9f0d0a8ffedbe29469f736bcd171aa2f2fbf27e094648ef38ec416d0b4dc6c9a","target":"record","created_at":"2026-07-05T02:12:22Z","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":"0476c06e47e84dd70b878d2f7ee7f0d7ada9266cf112b979181ecbbaa97b5012","cross_cats_sorted":["quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2019-05-08T12:45:43Z","title_canon_sha256":"761f0352e0d8576803112224fc85d3063001a2afbf73292049c11dcb4efd6455"},"schema_version":"1.0","source":{"id":"1905.03045","kind":"arxiv","version":2}},"canonical_sha256":"118085e8f747f74454bc4e3ec7e6c2ad77094a09861f273aa39cc42b8a233084","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"118085e8f747f74454bc4e3ec7e6c2ad77094a09861f273aa39cc42b8a233084","first_computed_at":"2026-07-05T02:12:22.386802Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:12:22.386802Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"C4wxcSqxWMsBYX4IY5XbkaQs+sGpj+mCh3vDoB5zxSfypGY9ZGtLBqK4wn6pE9qnPIhYBUH3wnBywOXewagCDQ==","signature_status":"signed_v1","signed_at":"2026-07-05T02:12:22.387224Z","signed_message":"canonical_sha256_bytes"},"source_id":"1905.03045","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9f0d0a8ffedbe29469f736bcd171aa2f2fbf27e094648ef38ec416d0b4dc6c9a","sha256:180dee9afe8cfb3d8e8a8a305edb9a5bfefd7682f111c5add2438b8488e9da1c"],"state_sha256":"17f983b93a411017f0ad680c223c02bdeb4ec812329af876548008fd74a054b8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7nzrZKRF6ktEgpOHFUyOokP31qDQHE7s2JEPTqNOExN04DTIa9JGHVS6x8jt5/wKYK4gBefIviO0vDZ2Qg/GDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T19:44:15.154536Z","bundle_sha256":"ad7f588a1979d741711b4ae65f6be4983b95a4ea67969419d76a2890685024c5"}}