{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2007:ZCHT6BBVFH2W7S5PBGJBMFBLTJ","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":"75cb02e0948353647904cc246c39dde75d78ba6de21ff9d9e55b2988d0e803ac","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2007-02-07T12:53:55Z","title_canon_sha256":"e9b536f0287a8a6a94ff29a90e082115f01392191a9092a7ff89cfea50bfa551"},"schema_version":"1.0","source":{"id":"astro-ph/0702193","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0702193","created_at":"2026-07-04T17:29:17Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0702193v1","created_at":"2026-07-04T17:29:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0702193","created_at":"2026-07-04T17:29:17Z"},{"alias_kind":"pith_short_12","alias_value":"ZCHT6BBVFH2W","created_at":"2026-07-04T17:29:17Z"},{"alias_kind":"pith_short_16","alias_value":"ZCHT6BBVFH2W7S5P","created_at":"2026-07-04T17:29:17Z"},{"alias_kind":"pith_short_8","alias_value":"ZCHT6BBV","created_at":"2026-07-04T17:29:17Z"}],"graph_snapshots":[{"event_id":"sha256:ab8fc1bdb71d6ca29ff7ca55bb3c0b1ada8c1b151cf0bd0f173f387ea3de8a22","target":"graph","created_at":"2026-07-04T17:29:17Z","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/0702193/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We retrieve the H_2O expansion velocity in a number of comets, using the 18-cm line shapes of the OH radical observed with the Nan\\c{c}ay radio telescope. The H_2O velocity is derived from the large base of a trapezium fitted to the observed spectra. This method, which was previously applied to 9 comets, is now extended to 30 further comets. This allows us to study the evolution of their water molecule outflow velocity over a large range of heliocentric distances and gas production rates. Our analysis confirms and extends previous analyses. The retrieved expansion velocities increases with inc","authors_text":"D. Bockel\\'ee-Morvan, J. Crovisier, P. Colom, W.-H. Ip, W.-L. Tseng","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2007-02-07T12:53:55Z","title":"Cometary water expansion velocity from OH line shapes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0702193","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:c346b44041fc2dc32c63ea4f41f76c7967a3f49e3b06a7f84c6aedb279df05d9","target":"record","created_at":"2026-07-04T17:29:17Z","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":"75cb02e0948353647904cc246c39dde75d78ba6de21ff9d9e55b2988d0e803ac","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2007-02-07T12:53:55Z","title_canon_sha256":"e9b536f0287a8a6a94ff29a90e082115f01392191a9092a7ff89cfea50bfa551"},"schema_version":"1.0","source":{"id":"astro-ph/0702193","kind":"arxiv","version":1}},"canonical_sha256":"c88f3f043529f56fcbaf099216142b9a4fff9a9aa432ac7ac466e787e6d5f8b2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c88f3f043529f56fcbaf099216142b9a4fff9a9aa432ac7ac466e787e6d5f8b2","first_computed_at":"2026-07-04T17:29:17.470071Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T17:29:17.470071Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hJd6O1x32n7vNhQDKOvrLssgfuM22oENef5VcBn8zEJZCsJ0HOU/nFjbjuZGEjNjqh34tRj/8GUFjDev8YlfAg==","signature_status":"signed_v1","signed_at":"2026-07-04T17:29:17.470482Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0702193","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c346b44041fc2dc32c63ea4f41f76c7967a3f49e3b06a7f84c6aedb279df05d9","sha256:ab8fc1bdb71d6ca29ff7ca55bb3c0b1ada8c1b151cf0bd0f173f387ea3de8a22"],"state_sha256":"03eab6beea9e4a2da2a1d87384c30be2402764b76ad124c616f67da59c6fcea7"}