{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:OC5MSEURTTVTG5XEFXMUGR2HQX","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":"5f0148f82d5c90736510aa709097bc240425bbfae1bfd9182b3e4f6ded12914a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-03-26T16:10:52Z","title_canon_sha256":"f5626317894ab2cd2d08ed0277a77354c67d993cf4d54e984bf08076aafe88bf"},"schema_version":"1.0","source":{"id":"1903.10981","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1903.10981","created_at":"2026-05-17T23:49:38Z"},{"alias_kind":"arxiv_version","alias_value":"1903.10981v1","created_at":"2026-05-17T23:49:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1903.10981","created_at":"2026-05-17T23:49:38Z"},{"alias_kind":"pith_short_12","alias_value":"OC5MSEURTTVT","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_16","alias_value":"OC5MSEURTTVTG5XE","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_8","alias_value":"OC5MSEUR","created_at":"2026-05-18T12:33:24Z"}],"graph_snapshots":[{"event_id":"sha256:1f668f46dbb62c4e171d3cb62bce28cfdbd2deedebc442008d66449c4bc82c25","target":"graph","created_at":"2026-05-17T23:49:38Z","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":"Oxygen atom addition and insertion reactions may provide a pathway to chemical complexity in ices that are too cold for radicals to diffuse and react. We have studied the ice-phase reactions of photo-produced oxygen atoms with C2 hydrocarbons under ISM-like conditions. The main products of oxygen atom reactions with ethane are ethanol and acetaldehyde; with ethylene are ethylene oxide and acetaldehyde; and with acetylene is ketene. The derived branching ratio from ethane to ethanol is ~0.74 and from ethylene to ethylene oxide is ~0.47. For all three hydrocarbons there is evidence of an effecti","authors_text":"Jennifer B. Bergner, Karin I. Oberg, Mahesh Rajappan","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-03-26T16:10:52Z","title":"Oxygen atom reactions with C2H6, C2H4, and C2H2 in ices"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.10981","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":"sha256:932d5a121c98f0e6078a4c7c07c03ae5821a55db6d03518554559834aed8565d","target":"record","created_at":"2026-05-17T23:49:38Z","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":"5f0148f82d5c90736510aa709097bc240425bbfae1bfd9182b3e4f6ded12914a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-03-26T16:10:52Z","title_canon_sha256":"f5626317894ab2cd2d08ed0277a77354c67d993cf4d54e984bf08076aafe88bf"},"schema_version":"1.0","source":{"id":"1903.10981","kind":"arxiv","version":1}},"canonical_sha256":"70bac912919ceb3376e42dd943474785e0f92eba4723811134f9d39d11d4976f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"70bac912919ceb3376e42dd943474785e0f92eba4723811134f9d39d11d4976f","first_computed_at":"2026-05-17T23:49:38.360385Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:49:38.360385Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"gTjYoN8tmk2UbQoszeMwtUVtiyp4rWumblK1C2xF6OSulNE7KlCyKOu4d4oTPcRU+zv+8bmog5vx7D6MJAJSCw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:49:38.361072Z","signed_message":"canonical_sha256_bytes"},"source_id":"1903.10981","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:932d5a121c98f0e6078a4c7c07c03ae5821a55db6d03518554559834aed8565d","sha256:1f668f46dbb62c4e171d3cb62bce28cfdbd2deedebc442008d66449c4bc82c25"],"state_sha256":"6b5b4dad05b8fabdd799cb4cf034f8c9d413f4e90bb9b14dc8f1f76aaabcb5c8"}