{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:3LD7WXJHEAJ36FWDJJKCN4OXYA","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":"40bb8188add63ded75bc99ce0360fc798f781b9dc4abe8a50fb375fead1393e5","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-09-15T16:37:53Z","title_canon_sha256":"88a281957b1220c2c7fab56a497d04a0d24363d3575c945a950a35fb02c97817"},"schema_version":"1.0","source":{"id":"1609.04728","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1609.04728","created_at":"2026-05-18T01:01:22Z"},{"alias_kind":"arxiv_version","alias_value":"1609.04728v1","created_at":"2026-05-18T01:01:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1609.04728","created_at":"2026-05-18T01:01:22Z"},{"alias_kind":"pith_short_12","alias_value":"3LD7WXJHEAJ3","created_at":"2026-05-18T12:29:55Z"},{"alias_kind":"pith_short_16","alias_value":"3LD7WXJHEAJ36FWD","created_at":"2026-05-18T12:29:55Z"},{"alias_kind":"pith_short_8","alias_value":"3LD7WXJH","created_at":"2026-05-18T12:29:55Z"}],"graph_snapshots":[{"event_id":"sha256:a8e6d01a742ee168e8ecce47e1942d5cc7f1381c3fef7a00c0b07adc9291a715","target":"graph","created_at":"2026-05-18T01:01:22Z","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":"The chemistry of dense interstellar regions was analyzed using a time-dependent gas-grain astrochemical simulation and a new chemical network that incorporates deuterated chemistry taking into account nuclear spin-states for the hydrogen chemistry and its deuterated isotopologues. With this new network, the utility of the [HCO$^+$]/[DCO$^+$] abundance ratio as a probe of the cosmic ray ionization rate has been reexamined, with special attention paid to the effect of the initial value of the molecular hydrogen ortho-to-para ratio (OPR). After discussing the use of the probe for cold cores, we t","authors_text":"Christopher N. Shingledecker, Eric Herbst, Jennifer B. Bergner, Karin I. Oberg, Romane Le Gal, Ugo Hincelin","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-09-15T16:37:53Z","title":"On the Inference of the Cosmic Ray Ionization Rate $\\zeta$ from the HCO$^+$-to-DCO$^+$ Abundance Ratio: The Effect of Nuclear Spin"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1609.04728","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":"sha256:106d3b7ed5de076da81ad7416da168fdaa67e925ca16e41f5a31ac4c8b585521","target":"record","created_at":"2026-05-18T01:01:22Z","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":"40bb8188add63ded75bc99ce0360fc798f781b9dc4abe8a50fb375fead1393e5","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-09-15T16:37:53Z","title_canon_sha256":"88a281957b1220c2c7fab56a497d04a0d24363d3575c945a950a35fb02c97817"},"schema_version":"1.0","source":{"id":"1609.04728","kind":"arxiv","version":1}},"canonical_sha256":"dac7fb5d272013bf16c34a5426f1d7c00170fe5a90d4e51ac739fa84f524d517","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"dac7fb5d272013bf16c34a5426f1d7c00170fe5a90d4e51ac739fa84f524d517","first_computed_at":"2026-05-18T01:01:22.044053Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:01:22.044053Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ETa7LjnjyFdrNDaV5aLj8U3bfULND+70qxmRXResoc3pmA3K7mU5pQ1wgbGICrxNHNXBUcM1rDaKEEkH29c5Ag==","signature_status":"signed_v1","signed_at":"2026-05-18T01:01:22.044707Z","signed_message":"canonical_sha256_bytes"},"source_id":"1609.04728","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:106d3b7ed5de076da81ad7416da168fdaa67e925ca16e41f5a31ac4c8b585521","sha256:a8e6d01a742ee168e8ecce47e1942d5cc7f1381c3fef7a00c0b07adc9291a715"],"state_sha256":"0e018c39629d285bc8a6ff3ca2ac4f10687cfe73b83f56d79e09f8e5426de514"}