{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2005:BFFB2UJ5MJG4HTISXRCLOP5VGI","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":"dc9116ee0011a39d9ac8500f3d7cddb2318dffe92958de47e3dea1fc89602d11","cross_cats_sorted":["gr-qc"],"license":"","primary_cat":"astro-ph","submitted_at":"2005-09-27T06:16:18Z","title_canon_sha256":"60e76d43aac6992206fedd7d188092827982fb7871125171cdff0dfd3ea6a8e2"},"schema_version":"1.0","source":{"id":"astro-ph/0509790","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0509790","created_at":"2026-07-04T14:47:48Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0509790v1","created_at":"2026-07-04T14:47:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0509790","created_at":"2026-07-04T14:47:48Z"},{"alias_kind":"pith_short_12","alias_value":"BFFB2UJ5MJG4","created_at":"2026-07-04T14:47:48Z"},{"alias_kind":"pith_short_16","alias_value":"BFFB2UJ5MJG4HTIS","created_at":"2026-07-04T14:47:48Z"},{"alias_kind":"pith_short_8","alias_value":"BFFB2UJ5","created_at":"2026-07-04T14:47:48Z"}],"graph_snapshots":[{"event_id":"sha256:a95e753945ccb72b87b49be5ffcd5e3c22450b6591694f1c1fbfd52a4ec281ab","target":"graph","created_at":"2026-07-04T14:47:48Z","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/astro-ph/0509790/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We investigate observational constraints on the variable Chaplygin gas model from the gold sample of type Ia supernova data and the recent measurements of the X-ray gas mass fractions in galaxy clusters. Combining these databases, we obtain a tight constraint on the two model parameters. Our results indicate that the original Chaplygin gas model is ruled out by the data at 99.7% confidence level.","authors_text":"Yuan-Zhong Zhang, Zong-Kuan Guo","cross_cats":["gr-qc"],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2005-09-27T06:16:18Z","title":"Observational Constraints on Variable Chaplygin Gas"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0509790","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":"sha256:5b5c6a4442d9f1e8f60e68f30095ba852e06223fb1ea04a43e4dbb406cbe654d","target":"record","created_at":"2026-07-04T14:47:48Z","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":"dc9116ee0011a39d9ac8500f3d7cddb2318dffe92958de47e3dea1fc89602d11","cross_cats_sorted":["gr-qc"],"license":"","primary_cat":"astro-ph","submitted_at":"2005-09-27T06:16:18Z","title_canon_sha256":"60e76d43aac6992206fedd7d188092827982fb7871125171cdff0dfd3ea6a8e2"},"schema_version":"1.0","source":{"id":"astro-ph/0509790","kind":"arxiv","version":1}},"canonical_sha256":"094a1d513d624dc3cd12bc44b73fb5320f14e9b13d5a041a36e97614b6cc5b66","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"094a1d513d624dc3cd12bc44b73fb5320f14e9b13d5a041a36e97614b6cc5b66","first_computed_at":"2026-07-04T14:47:48.009893Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T14:47:48.009893Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"MTxkz9yHeNc43Ov8oAtIdSzbxPlmdjvCFweBmI2/ClGeWigtgVllVPldFvGoT8uqfaY9wB1JDHRi62w/c1R5Ag==","signature_status":"signed_v1","signed_at":"2026-07-04T14:47:48.010240Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0509790","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5b5c6a4442d9f1e8f60e68f30095ba852e06223fb1ea04a43e4dbb406cbe654d","sha256:a95e753945ccb72b87b49be5ffcd5e3c22450b6591694f1c1fbfd52a4ec281ab"],"state_sha256":"f242ebaccafc43242e75967d2eff70dbb9f5748704a0f955db9901a9a84b4824"}