{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2003:2JX55XO26B2Y27TZPFWBOYAQOB","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":"d215436f0d56c171e10868cc17f0628fe2691e75eba17815fad5fb3e6a00024c","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2003-01-31T15:26:40Z","title_canon_sha256":"71de40d9b4c0da24df0f321ca413afa607cbfcd1f0a82324dff851dbcb6159d2"},"schema_version":"1.0","source":{"id":"astro-ph/0301648","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0301648","created_at":"2026-05-18T04:21:41Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0301648v1","created_at":"2026-05-18T04:21:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0301648","created_at":"2026-05-18T04:21:41Z"},{"alias_kind":"pith_short_12","alias_value":"2JX55XO26B2Y","created_at":"2026-05-18T12:25:51Z"},{"alias_kind":"pith_short_16","alias_value":"2JX55XO26B2Y27TZ","created_at":"2026-05-18T12:25:51Z"},{"alias_kind":"pith_short_8","alias_value":"2JX55XO2","created_at":"2026-05-18T12:25:51Z"}],"graph_snapshots":[{"event_id":"sha256:009fa23ba06f4c5ba5e0991487b90a2a5f445c8edb062fc4733fceb0bdd46452","target":"graph","created_at":"2026-05-18T04:21:41Z","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 new model atmosphere analysis for the peculiar DQ white dwarf discovered by Carollo et al. (2002) is presented. The effective temperature and carbon abundance have been estimated by fitting both the photometric data (UBJ,VRF,IN,JHK) and a low resolution spectrum (3500<lambda<7500 A) with a new model grid for helium-rich white dwarfs with traces of carbon (DQ stars). We estimate Teff ~ 5120 +/- 200 K and log[C/He] ~ -5.8 +/- 0.5, which make GSC2U J131147.2+292348 the coolest DQ star ever observed. This result indicates that the hypothetical transition from C2 to C2H molecules around Teff = 60","authors_text":"A. Spagna, D. Carollo, D. Koester, M.G. Lattanzi, S.T. Hodgkin","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2003-01-31T15:26:40Z","title":"Model atmosphere analysis of the extreme DQ white dwarf GSC2U J131147.2+292348"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0301648","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:ad5512fa0b1ed5c093541c89b4f82d81a944c8ea889458714f17c3354247b5b4","target":"record","created_at":"2026-05-18T04:21:41Z","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":"d215436f0d56c171e10868cc17f0628fe2691e75eba17815fad5fb3e6a00024c","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2003-01-31T15:26:40Z","title_canon_sha256":"71de40d9b4c0da24df0f321ca413afa607cbfcd1f0a82324dff851dbcb6159d2"},"schema_version":"1.0","source":{"id":"astro-ph/0301648","kind":"arxiv","version":1}},"canonical_sha256":"d26fdedddaf0758d7e79796c1760107058456d0ff29549da85169bcbbbcabd1f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d26fdedddaf0758d7e79796c1760107058456d0ff29549da85169bcbbbcabd1f","first_computed_at":"2026-05-18T04:21:41.998047Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:21:41.998047Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"qJkpFzzyxzN5rtJEOviTv0pyjEnNyiroyg5vsAjCbzE/AuYXxqOxoNfYTi9+QXK77CztVJKLFCtdQJ6olHvbCg==","signature_status":"signed_v1","signed_at":"2026-05-18T04:21:41.998515Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0301648","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ad5512fa0b1ed5c093541c89b4f82d81a944c8ea889458714f17c3354247b5b4","sha256:009fa23ba06f4c5ba5e0991487b90a2a5f445c8edb062fc4733fceb0bdd46452"],"state_sha256":"8e34058d23ddcaf80843a0faffb1dd035cdc45fd16ada96839b1e230a7cb0d11"}