{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:IWX77UNR7FD6YRS3GOW56J5WQM","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":"ddb3a0804ae14c287ff9e48c475270536f149f52e5804bb43f11ebaf7bab3ec6","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-08-07T00:08:27Z","title_canon_sha256":"a78358aab0f1edfaf2177e9fa1530abc9bccc869c84043590f4b075a6ab85cfa"},"schema_version":"1.0","source":{"id":"1208.1306","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1208.1306","created_at":"2026-05-18T01:55:22Z"},{"alias_kind":"arxiv_version","alias_value":"1208.1306v1","created_at":"2026-05-18T01:55:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1208.1306","created_at":"2026-05-18T01:55:22Z"},{"alias_kind":"pith_short_12","alias_value":"IWX77UNR7FD6","created_at":"2026-05-18T12:27:09Z"},{"alias_kind":"pith_short_16","alias_value":"IWX77UNR7FD6YRS3","created_at":"2026-05-18T12:27:09Z"},{"alias_kind":"pith_short_8","alias_value":"IWX77UNR","created_at":"2026-05-18T12:27:09Z"}],"graph_snapshots":[{"event_id":"sha256:4716026a1dfabb4c1a10223647d9143b84e04b96bb81ea55e71edf196548c9f0","target":"graph","created_at":"2026-05-18T01:55:22Z","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"},"paper":{"abstract_excerpt":"We present Spitzer IRS spectra of four carbon stars located in the Galactic Halo and the thick disc. The spectra display typical features of carbon stars with SiC dust emission and C$_2$H$_2$ molecular absorption. Dust radiative transfer models and infrared colors enable us to determine the dust production rates for these stars whilst prior CO measurements yield expansion velocities and total mass-loss rates.\n  The gas properties (low expansion velocities (around 7 km/s) and strong C$_2$H$_2$ molecular absorption bands) are consistent with the stars being metal-poor. However the dust content o","authors_text":"Albert.A. Zijlstra, Eric Lagadec, Greg.C. Sloan, J. R. Houck, Nicolas Mauron","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-08-07T00:08:27Z","title":"The dust and gas content of carbon stars toward the Galactic Halo"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1208.1306","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":"sha256:6629ccbeb9c32c676ef4bbaef6d79448fd68e90330e3b432b0450f59d45995a9","target":"record","created_at":"2026-05-18T01:55:22Z","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":"ddb3a0804ae14c287ff9e48c475270536f149f52e5804bb43f11ebaf7bab3ec6","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-08-07T00:08:27Z","title_canon_sha256":"a78358aab0f1edfaf2177e9fa1530abc9bccc869c84043590f4b075a6ab85cfa"},"schema_version":"1.0","source":{"id":"1208.1306","kind":"arxiv","version":1}},"canonical_sha256":"45afffd1b1f947ec465b33addf27b6830ccac63ce275c116b0a46f75ca43b0bf","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"45afffd1b1f947ec465b33addf27b6830ccac63ce275c116b0a46f75ca43b0bf","first_computed_at":"2026-05-18T01:55:22.381236Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:55:22.381236Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fDOjaLbZP1mLzLl0CzR5m33WzFCxhSolGcRP/tpVP2gJCQOCEZW3fIvEC0xhnbSj7f5Zz4+qvTrHbFE704P4Ag==","signature_status":"signed_v1","signed_at":"2026-05-18T01:55:22.381947Z","signed_message":"canonical_sha256_bytes"},"source_id":"1208.1306","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6629ccbeb9c32c676ef4bbaef6d79448fd68e90330e3b432b0450f59d45995a9","sha256:4716026a1dfabb4c1a10223647d9143b84e04b96bb81ea55e71edf196548c9f0"],"state_sha256":"b0a169d618d25259aa822435b8131940b04d04dee891f6fd4c8efa97b764dc00"}