{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:MBSVJJNLTU6BLIJWWWWLQHTFRT","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":"a25c34f3f9af6c4678ad8a15737c2db306afd63c630069a51f6e47bab11cf7d8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-04-22T10:37:56Z","title_canon_sha256":"7048d64ffddb0f9f90bab7ed7582619edb62529940cd636cbb94dd643a6a1d54"},"schema_version":"1.0","source":{"id":"1504.05721","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1504.05721","created_at":"2026-05-18T02:04:05Z"},{"alias_kind":"arxiv_version","alias_value":"1504.05721v1","created_at":"2026-05-18T02:04:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1504.05721","created_at":"2026-05-18T02:04:05Z"},{"alias_kind":"pith_short_12","alias_value":"MBSVJJNLTU6B","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_16","alias_value":"MBSVJJNLTU6BLIJW","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_8","alias_value":"MBSVJJNL","created_at":"2026-05-18T12:29:32Z"}],"graph_snapshots":[{"event_id":"sha256:bcbf5af9845bdca02b5436e6dff56a6658ef7dbd43706be2bb0c0a608da54b8a","target":"graph","created_at":"2026-05-18T02:04:05Z","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 have conducted radioastronomical observations of 9 dark clouds with the IRAM 30m telescope. We present the first identification in space of the ketenyl radical (HCCO) toward the starless core Lupus-1A and the molecular cloud L483, and the detection of the related molecules ketene (H2CCO) and acetaldehyde (CH3CHO) in these two sources and 3 additional dark clouds. We also report the detection of the formyl radical (HCO) in the 9 targeted sources and of propylene (CH2CHCH3) in 4 of the observed sources, which extends significantly the number of dark clouds where these molecules are known to b","authors_text":"Jose Cernicharo, Marcelino Agundez, Michel Guelin","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-04-22T10:37:56Z","title":"Discovery of interstellar ketenyl (HCCO), a surprisingly abundant radical"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.05721","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":"sha256:6eade0f785f0a9a83e8feecf9573a9b14f8de59009a9da88b104d12400335676","target":"record","created_at":"2026-05-18T02:04:05Z","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":"a25c34f3f9af6c4678ad8a15737c2db306afd63c630069a51f6e47bab11cf7d8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-04-22T10:37:56Z","title_canon_sha256":"7048d64ffddb0f9f90bab7ed7582619edb62529940cd636cbb94dd643a6a1d54"},"schema_version":"1.0","source":{"id":"1504.05721","kind":"arxiv","version":1}},"canonical_sha256":"606554a5ab9d3c15a136b5acb81e658ceb11c32ce9800e350a584d5d237f9bdc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"606554a5ab9d3c15a136b5acb81e658ceb11c32ce9800e350a584d5d237f9bdc","first_computed_at":"2026-05-18T02:04:05.454169Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:04:05.454169Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2axeJ4AMl5sg5I8XBAZIley1edEJhIxf2IlCc9ssdVsPVoi91Pdj85YI09jq59OXWXzoLWvhm1OZR0X66BJdDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:04:05.454906Z","signed_message":"canonical_sha256_bytes"},"source_id":"1504.05721","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6eade0f785f0a9a83e8feecf9573a9b14f8de59009a9da88b104d12400335676","sha256:bcbf5af9845bdca02b5436e6dff56a6658ef7dbd43706be2bb0c0a608da54b8a"],"state_sha256":"380eed4712716037be73af0e66f05a075d1c4e5b8c690ac145c90e44d39ba3fe"}