{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:HAJXBQBRBVHLFMSSF4NJEBZVLI","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":"da1fd2387e5d31780dbf3f1793f48dd12053ca2360b74e93d3755d7377975ad2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-03-15T20:36:07Z","title_canon_sha256":"904ccd2feb90b795c5489c160909e47cfe9d96d2712d223a996f4ab9772eee2c"},"schema_version":"1.0","source":{"id":"1903.06793","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1903.06793","created_at":"2026-05-17T23:48:29Z"},{"alias_kind":"arxiv_version","alias_value":"1903.06793v1","created_at":"2026-05-17T23:48:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1903.06793","created_at":"2026-05-17T23:48:29Z"},{"alias_kind":"pith_short_12","alias_value":"HAJXBQBRBVHL","created_at":"2026-05-18T12:33:18Z"},{"alias_kind":"pith_short_16","alias_value":"HAJXBQBRBVHLFMSS","created_at":"2026-05-18T12:33:18Z"},{"alias_kind":"pith_short_8","alias_value":"HAJXBQBR","created_at":"2026-05-18T12:33:18Z"}],"graph_snapshots":[{"event_id":"sha256:c8ea15a64981bc393296205c2ec99233b095d1d911d86b94e60c0fd4e0c4adda","target":"graph","created_at":"2026-05-17T23:48:29Z","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":"Following our previous detection of ubiquitous H2O and O2 absorption against the far-UV continuum of stars located near the nucleus of Comet 67P/Churyumov-Gerasimenko, we present a serendipitously observed stellar occultation that occurred on 2015 September 13, approximately one month after the comet's perihelion passage. The occultation appears in two consecutive 10-minute spectral images obtained by Alice, Rosetta's ultraviolet (700-2100 A) spectrograph, both of which show H2O absorption with column density $>10^{17.5} \\mathrm{cm}^{-2}$ and significant O2 absorption ($\\mathrm{O2/H2O} \\approx","authors_text":"A. J. Steffl, B. A. Keeney, H. A. Weaver, J.-L. Bertaux, J. Noonan, J. P. Pineau, Jr., J. Wm. Parker, L. M. Feaga, M. F. A'Hearn, M. M. Knight, M. Versteeg, P. D. Feldman, R. A. Medina, R. J. Vervack, R. N. Schindhelm, S. A. Stern","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-03-15T20:36:07Z","title":"Stellar Occultation by Comet 67P/Churyumov-Gerasimenko Observed with Rosetta's Alice Far-Ultraviolet Spectrograph"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.06793","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":"sha256:46f44e84d7bcd82038b11f2f81ee07a5cd1aab8b813e18919206a6da53fb5727","target":"record","created_at":"2026-05-17T23:48:29Z","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":"da1fd2387e5d31780dbf3f1793f48dd12053ca2360b74e93d3755d7377975ad2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-03-15T20:36:07Z","title_canon_sha256":"904ccd2feb90b795c5489c160909e47cfe9d96d2712d223a996f4ab9772eee2c"},"schema_version":"1.0","source":{"id":"1903.06793","kind":"arxiv","version":1}},"canonical_sha256":"381370c0310d4eb2b2522f1a9207355a27bcbb4b7f058570969bda1ee980bd44","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"381370c0310d4eb2b2522f1a9207355a27bcbb4b7f058570969bda1ee980bd44","first_computed_at":"2026-05-17T23:48:29.804741Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:48:29.804741Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Do2XDFxy6QAErSWdGAWa3WvpbgjRotFGvPTYXS6Z//y99UQbKSZjREdN+sPykijCyWZ0bWc9z3UlRKX+jsTBDw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:48:29.805460Z","signed_message":"canonical_sha256_bytes"},"source_id":"1903.06793","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:46f44e84d7bcd82038b11f2f81ee07a5cd1aab8b813e18919206a6da53fb5727","sha256:c8ea15a64981bc393296205c2ec99233b095d1d911d86b94e60c0fd4e0c4adda"],"state_sha256":"dfb5a54cc0bbba578601054df8f9d4ead7c0dd231915ad964e64459175118d66"}