{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2007:6P6TQ66JC5YO2LIPPM2WEYDDPI","short_pith_number":"pith:6P6TQ66J","canonical_record":{"source":{"id":"0704.2426","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2007-04-18T20:34:26Z","cross_cats_sorted":[],"title_canon_sha256":"81455eba68ed15a5de4c29ece6724e82054c69c0aa6c116a347db1784daf078e","abstract_canon_sha256":"05adf81ec32740cb7c148a6148113dd56904ebbebe8880643e48813047312b4d"},"schema_version":"1.0"},"canonical_sha256":"f3fd387bc91770ed2d0f7b356260637a2b79ba53cae49cb93786d90e30b5aee1","source":{"kind":"arxiv","id":"0704.2426","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0704.2426","created_at":"2026-07-04T15:24:54Z"},{"alias_kind":"arxiv_version","alias_value":"0704.2426v2","created_at":"2026-07-04T15:24:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0704.2426","created_at":"2026-07-04T15:24:54Z"},{"alias_kind":"pith_short_12","alias_value":"6P6TQ66JC5YO","created_at":"2026-07-04T15:24:54Z"},{"alias_kind":"pith_short_16","alias_value":"6P6TQ66JC5YO2LIP","created_at":"2026-07-04T15:24:54Z"},{"alias_kind":"pith_short_8","alias_value":"6P6TQ66J","created_at":"2026-07-04T15:24:54Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2007:6P6TQ66JC5YO2LIPPM2WEYDDPI","target":"record","payload":{"canonical_record":{"source":{"id":"0704.2426","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2007-04-18T20:34:26Z","cross_cats_sorted":[],"title_canon_sha256":"81455eba68ed15a5de4c29ece6724e82054c69c0aa6c116a347db1784daf078e","abstract_canon_sha256":"05adf81ec32740cb7c148a6148113dd56904ebbebe8880643e48813047312b4d"},"schema_version":"1.0"},"canonical_sha256":"f3fd387bc91770ed2d0f7b356260637a2b79ba53cae49cb93786d90e30b5aee1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:24:54.512501Z","signature_b64":"teXc7VwaRt/2QCSp7YYDHdghWvVi6AWOkp2Qsn7J91Tfv50pA5cObbYJbCHY8Y0L0KINCji8TWvnl2rkcY3FBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f3fd387bc91770ed2d0f7b356260637a2b79ba53cae49cb93786d90e30b5aee1","last_reissued_at":"2026-07-04T15:24:54.512093Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:24:54.512093Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0704.2426","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":"2026-07-04T15:24:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Nkbhg5plwOeeRYCoXSyRcdcRw6xdkdO/mJDSn4dZCiBEIXPUo+p0XaNwgmsZcItjoqiBRSTyGVln3T1aRV+xBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-10T20:41:44.549286Z"},"content_sha256":"a6c728b1dd940d0a4080b9f4fc43955e9d4bdd146369b6b41a4d2592001f67a2","schema_version":"1.0","event_id":"sha256:a6c728b1dd940d0a4080b9f4fc43955e9d4bdd146369b6b41a4d2592001f67a2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2007:6P6TQ66JC5YO2LIPPM2WEYDDPI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Testing General Metric Theories of Gravity with Bursting Neutron Stars","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Dimitrios Psaltis (Arizona)","submitted_at":"2007-04-18T20:34:26Z","abstract_excerpt":"I show that several observable properties of bursting neutron stars in metric theories of gravity can be calculated using only conservation laws, Killing symmetries, and the Einstein equivalence principle, without requiring the validity of the general relativistic field equations. I calculate, in particular, the gravitational redshift of a surface atomic line, the touchdown luminosity of a radius-expansion burst, which is believed to be equal to the Eddington critical luminosity, and the apparent surface area of a neutron star as measured during the cooling tails of bursts. I show that, for a "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0704.2426","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/0704.2426/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":"2026-07-04T15:24:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"R4pzyo83tonlk/vUN95OHhyMavepE/H5bmeG2lpmcj2gSinLDLwgoH4OPey5lk0cxtCg18JquAyqnZdApAjrCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-10T20:41:44.549683Z"},"content_sha256":"59caebdfaeff67d4c9f9a8b497796c1ef2775332e936642f832d90251386ae39","schema_version":"1.0","event_id":"sha256:59caebdfaeff67d4c9f9a8b497796c1ef2775332e936642f832d90251386ae39"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6P6TQ66JC5YO2LIPPM2WEYDDPI/bundle.json","state_url":"https://pith.science/pith/6P6TQ66JC5YO2LIPPM2WEYDDPI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6P6TQ66JC5YO2LIPPM2WEYDDPI/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":"2026-07-10T20:41:44Z","links":{"resolver":"https://pith.science/pith/6P6TQ66JC5YO2LIPPM2WEYDDPI","bundle":"https://pith.science/pith/6P6TQ66JC5YO2LIPPM2WEYDDPI/bundle.json","state":"https://pith.science/pith/6P6TQ66JC5YO2LIPPM2WEYDDPI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6P6TQ66JC5YO2LIPPM2WEYDDPI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2007:6P6TQ66JC5YO2LIPPM2WEYDDPI","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":"05adf81ec32740cb7c148a6148113dd56904ebbebe8880643e48813047312b4d","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2007-04-18T20:34:26Z","title_canon_sha256":"81455eba68ed15a5de4c29ece6724e82054c69c0aa6c116a347db1784daf078e"},"schema_version":"1.0","source":{"id":"0704.2426","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0704.2426","created_at":"2026-07-04T15:24:54Z"},{"alias_kind":"arxiv_version","alias_value":"0704.2426v2","created_at":"2026-07-04T15:24:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0704.2426","created_at":"2026-07-04T15:24:54Z"},{"alias_kind":"pith_short_12","alias_value":"6P6TQ66JC5YO","created_at":"2026-07-04T15:24:54Z"},{"alias_kind":"pith_short_16","alias_value":"6P6TQ66JC5YO2LIP","created_at":"2026-07-04T15:24:54Z"},{"alias_kind":"pith_short_8","alias_value":"6P6TQ66J","created_at":"2026-07-04T15:24:54Z"}],"graph_snapshots":[{"event_id":"sha256:59caebdfaeff67d4c9f9a8b497796c1ef2775332e936642f832d90251386ae39","target":"graph","created_at":"2026-07-04T15:24:54Z","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/0704.2426/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"I show that several observable properties of bursting neutron stars in metric theories of gravity can be calculated using only conservation laws, Killing symmetries, and the Einstein equivalence principle, without requiring the validity of the general relativistic field equations. I calculate, in particular, the gravitational redshift of a surface atomic line, the touchdown luminosity of a radius-expansion burst, which is believed to be equal to the Eddington critical luminosity, and the apparent surface area of a neutron star as measured during the cooling tails of bursts. I show that, for a ","authors_text":"Dimitrios Psaltis (Arizona)","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2007-04-18T20:34:26Z","title":"Testing General Metric Theories of Gravity with Bursting Neutron Stars"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0704.2426","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:a6c728b1dd940d0a4080b9f4fc43955e9d4bdd146369b6b41a4d2592001f67a2","target":"record","created_at":"2026-07-04T15:24:54Z","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":"05adf81ec32740cb7c148a6148113dd56904ebbebe8880643e48813047312b4d","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2007-04-18T20:34:26Z","title_canon_sha256":"81455eba68ed15a5de4c29ece6724e82054c69c0aa6c116a347db1784daf078e"},"schema_version":"1.0","source":{"id":"0704.2426","kind":"arxiv","version":2}},"canonical_sha256":"f3fd387bc91770ed2d0f7b356260637a2b79ba53cae49cb93786d90e30b5aee1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f3fd387bc91770ed2d0f7b356260637a2b79ba53cae49cb93786d90e30b5aee1","first_computed_at":"2026-07-04T15:24:54.512093Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:24:54.512093Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"teXc7VwaRt/2QCSp7YYDHdghWvVi6AWOkp2Qsn7J91Tfv50pA5cObbYJbCHY8Y0L0KINCji8TWvnl2rkcY3FBg==","signature_status":"signed_v1","signed_at":"2026-07-04T15:24:54.512501Z","signed_message":"canonical_sha256_bytes"},"source_id":"0704.2426","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a6c728b1dd940d0a4080b9f4fc43955e9d4bdd146369b6b41a4d2592001f67a2","sha256:59caebdfaeff67d4c9f9a8b497796c1ef2775332e936642f832d90251386ae39"],"state_sha256":"8924728d1ceead5a0a1c7df7a2da2997ca7132a6ee6bef11b30182425102e37d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vv7PFsJ9hBYAazLmf7/pViGC2fxlrNd5pzph2CXrdjQ7JfvBzHJaTW3c7Qgr9+OPGh9yatDGyoEDSfXHqugeBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-10T20:41:44.551886Z","bundle_sha256":"09af7335a103bc2220d090e3bb6ba9bfb643551f35b42bad2ce06ec7ff61c682"}}