{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:WUPKMRCQ5FM67NVENMRKCLWBNI","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":"c5d054f9e1818e08bf0b18c699fdc70ff44e42f106092b17d98eee5a7e3c5acb","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-07-21T11:10:19Z","title_canon_sha256":"db82c21c55b4407d0b07d07a970e7b00345d3b86968d3b5d7cb3e5b034ded92d"},"schema_version":"1.0","source":{"id":"1607.06265","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1607.06265","created_at":"2026-05-18T01:04:18Z"},{"alias_kind":"arxiv_version","alias_value":"1607.06265v1","created_at":"2026-05-18T01:04:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1607.06265","created_at":"2026-05-18T01:04:18Z"},{"alias_kind":"pith_short_12","alias_value":"WUPKMRCQ5FM6","created_at":"2026-05-18T12:30:51Z"},{"alias_kind":"pith_short_16","alias_value":"WUPKMRCQ5FM67NVE","created_at":"2026-05-18T12:30:51Z"},{"alias_kind":"pith_short_8","alias_value":"WUPKMRCQ","created_at":"2026-05-18T12:30:51Z"}],"graph_snapshots":[{"event_id":"sha256:2eb01a77507dd9d70d258ac043c3823b079e104e124a1e79614e1e3112ec8f96","target":"graph","created_at":"2026-05-18T01:04:18Z","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 CO+ reactive ion is thought to be a tracer of the boundary between a HII region and the hot molecular gas. In this study, we present the spatial distribution of the CO+ rotational emission toward the Mon R2 star-forming region. The CO+ emission presents a clumpy ring-like morphology, arising from a narrow dense layer around the HII region. We compare the CO+ distribution with other species present in photon-dominated regions (PDR), such as [CII] 158 mm, H2 S(3) rotational line at 9.3 mm, polycyclic aromatic hydrocarbons (PAHs) and HCO+. We find that the CO+ emission is spatially coincident","authors_text":"A. Fuente, A. Sanchez-Monge, C. Kramer, E. Roueff, J. Cernicharo, J. Pety, J. R. Goicoechea, J. R. Rizzo, M. Gerin, M. Gonzalez-Garcia, O. Berne, P. Pilleri, S. Garcia-Burillo, S. P. Trevino-Morales, V. Ossenkopf-Okada","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-07-21T11:10:19Z","title":"The first CO+ image: Probing the HI/H2 layer around the ultracompact HII region Mon R2"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1607.06265","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":"sha256:8d492c7651978f0b21a432e54f755176fd89ac57c4a7b1116261c73d77a1eaf8","target":"record","created_at":"2026-05-18T01:04:18Z","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":"c5d054f9e1818e08bf0b18c699fdc70ff44e42f106092b17d98eee5a7e3c5acb","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-07-21T11:10:19Z","title_canon_sha256":"db82c21c55b4407d0b07d07a970e7b00345d3b86968d3b5d7cb3e5b034ded92d"},"schema_version":"1.0","source":{"id":"1607.06265","kind":"arxiv","version":1}},"canonical_sha256":"b51ea64450e959efb6a46b22a12ec16a31db6ace422a46ae8e3b7206c2b4bfc4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b51ea64450e959efb6a46b22a12ec16a31db6ace422a46ae8e3b7206c2b4bfc4","first_computed_at":"2026-05-18T01:04:18.062998Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:04:18.062998Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hAefYHwW4YtCsBj7Syfk/bg3PTi9m8iXzSZigZDldnqdN8u9O1lELkWiw/g4FFS6rFroZPapoaMPIx9Y4ajJDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:04:18.063364Z","signed_message":"canonical_sha256_bytes"},"source_id":"1607.06265","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8d492c7651978f0b21a432e54f755176fd89ac57c4a7b1116261c73d77a1eaf8","sha256:2eb01a77507dd9d70d258ac043c3823b079e104e124a1e79614e1e3112ec8f96"],"state_sha256":"b8e57d0db4af8b3de2d059848caab820b625460bdc355398857af679b14c6f57"}