{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:3LB4MLM76F7IX7GOATLCXML55G","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":"e90ac90afbe4985fd04183436277dd967a7050a5e3f08d1a6a9c37bec74a193b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-03-12T13:44:20Z","title_canon_sha256":"0380bce38c159fea07f0650269a2328b97560ed1e62c0eef27352e1bf420b0a6"},"schema_version":"1.0","source":{"id":"1403.2930","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1403.2930","created_at":"2026-05-18T02:52:25Z"},{"alias_kind":"arxiv_version","alias_value":"1403.2930v1","created_at":"2026-05-18T02:52:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1403.2930","created_at":"2026-05-18T02:52:25Z"},{"alias_kind":"pith_short_12","alias_value":"3LB4MLM76F7I","created_at":"2026-05-18T12:28:11Z"},{"alias_kind":"pith_short_16","alias_value":"3LB4MLM76F7IX7GO","created_at":"2026-05-18T12:28:11Z"},{"alias_kind":"pith_short_8","alias_value":"3LB4MLM7","created_at":"2026-05-18T12:28:11Z"}],"graph_snapshots":[{"event_id":"sha256:0d1b98a6fd5efaa670fdf4084da492dcfa718a3f81307fc2deb839df7d3b0a1d","target":"graph","created_at":"2026-05-18T02:52:25Z","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":"Aims. We derive physical properties such as the optical depths and the column densities of $^{13}$CO and C$^{18}$O to investigate the relationship between the far ultraviolet (FUV) radiation and the abundance ratios between $^{13}$CO and C$^{18}$O.\n  Method. We have carried out wide-field (0.4 deg$^2$) observations with an angular resolution of 25.8 arcsec ($\\sim$ 0.05 pc) in $^{13}$CO ($J$=1--0) and C$^{18}$O ($J$=1--0) toward the Orion-A giant molecular cloud using the Nobeyama 45 m telescope in the on-the-fly mode.\n  Results. Overall distributions and velocity structures of the $^{13}$CO an","authors_text":"Akifumi Yamabi, Chihomi Hara, Fumitaka Nakamura, Hiroyuki Nishitani, Kazuhito Dobashi, Masao Saito, Munetake Momose, Ryohei Kawabe, Sho Katakura, Takashi Tsukagoshi, Tomohiro Tanaka, Tomomi Shimoikura, Yoshimi Kitamura, Yoshito Shimajiri","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-03-12T13:44:20Z","title":"High abundance ratio of $^{13}$CO to C$^{18}$O toward photon-dominated regions in the Orion-A giant molecular cloud"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1403.2930","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":"sha256:7dcb71f4042f0730f14ec90934c0e3f5982e8f9ce2b4b8d293afc53ac5049c9b","target":"record","created_at":"2026-05-18T02:52:25Z","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":"e90ac90afbe4985fd04183436277dd967a7050a5e3f08d1a6a9c37bec74a193b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-03-12T13:44:20Z","title_canon_sha256":"0380bce38c159fea07f0650269a2328b97560ed1e62c0eef27352e1bf420b0a6"},"schema_version":"1.0","source":{"id":"1403.2930","kind":"arxiv","version":1}},"canonical_sha256":"dac3c62d9ff17e8bfcce04d62bb17de98cf0fc321272f2babf91561240e8f0c3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"dac3c62d9ff17e8bfcce04d62bb17de98cf0fc321272f2babf91561240e8f0c3","first_computed_at":"2026-05-18T02:52:25.435627Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:52:25.435627Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"O3l7qzUso9gZkY0/cQDI36aNIZUvltn4XRsAQsoF7E7WI0h1sECvLggzLl2yENptCGsAMEEDluSHPpoEOictBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:52:25.436403Z","signed_message":"canonical_sha256_bytes"},"source_id":"1403.2930","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7dcb71f4042f0730f14ec90934c0e3f5982e8f9ce2b4b8d293afc53ac5049c9b","sha256:0d1b98a6fd5efaa670fdf4084da492dcfa718a3f81307fc2deb839df7d3b0a1d"],"state_sha256":"635beeff55ea5da848e19970af8f03387bb956cca6c7186c568bea511bb7a3ae"}