{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:Z5WVSOQZZB6UQARHMR6HXTR7BC","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":"2db4d139391d5801052592f206e62142487673ac38c2523cd2a3108a2d447509","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-09-25T09:56:06Z","title_canon_sha256":"e94a09132280533d740eaa10e7a54a12004d90616d7c85b98c04673ddc0fc6d2"},"schema_version":"1.0","source":{"id":"2009.12108","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2009.12108","created_at":"2026-07-05T02:44:50Z"},{"alias_kind":"arxiv_version","alias_value":"2009.12108v2","created_at":"2026-07-05T02:44:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2009.12108","created_at":"2026-07-05T02:44:50Z"},{"alias_kind":"pith_short_12","alias_value":"Z5WVSOQZZB6U","created_at":"2026-07-05T02:44:50Z"},{"alias_kind":"pith_short_16","alias_value":"Z5WVSOQZZB6UQARH","created_at":"2026-07-05T02:44:50Z"},{"alias_kind":"pith_short_8","alias_value":"Z5WVSOQZ","created_at":"2026-07-05T02:44:50Z"}],"graph_snapshots":[{"event_id":"sha256:4132cf5f5345cb55ee2ccfb6e48efe74fd895ff1b005ec21bb88d4a96792c0f3","target":"graph","created_at":"2026-07-05T02:44:50Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2009.12108/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"(Abridged) We present a large sample of o-H$_2$D$^+$ observations in high-mass star-forming regions and discuss possible empirical correlations with relevant physical quantities to assess its role as a chronometer of star-forming regions through different evolutionary stages. APEX observations of the ground-state transition of o-H$_2$D$^+$ were analysed in a sample of massive clumps selected from ATLASGAL at different evolutionary stages. Column densities and beam-averaged abundances of o-H$_2$D$^+$ with respect to H$_2$, $X$(o-H$_2$D$^+$), were obtained by modelling the spectra under the assu","authors_text":"A. Giannetti, F. Wyrowski, G. Sabatini, K. M. Menten, M. A. \\'Ordenes, M. Wienen, R. Pascale, S. Bovino, T. Csengeri, T. Pillai","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-09-25T09:56:06Z","title":"Survey of ortho-H$_2$D$^+$ in high-mass star-forming regions"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2009.12108","kind":"arxiv","version":2},"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":"sha256:718fc4eec8138570848c2d737cb8da39068e297768c2c048448640416c665c68","target":"record","created_at":"2026-07-05T02:44:50Z","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":"2db4d139391d5801052592f206e62142487673ac38c2523cd2a3108a2d447509","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-09-25T09:56:06Z","title_canon_sha256":"e94a09132280533d740eaa10e7a54a12004d90616d7c85b98c04673ddc0fc6d2"},"schema_version":"1.0","source":{"id":"2009.12108","kind":"arxiv","version":2}},"canonical_sha256":"cf6d593a19c87d480227647c7bce3f088df65172de124a4bc0363648e86e282e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cf6d593a19c87d480227647c7bce3f088df65172de124a4bc0363648e86e282e","first_computed_at":"2026-07-05T02:44:50.646752Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:44:50.646752Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"qxAOyvgdC6J31sybgOHv8M7Nx5eockdjconumrE7TYx0VY/K77Fqsov5WzLm2TVuBVUMETc0FZ1NsIuNwq5cCg==","signature_status":"signed_v1","signed_at":"2026-07-05T02:44:50.647311Z","signed_message":"canonical_sha256_bytes"},"source_id":"2009.12108","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:718fc4eec8138570848c2d737cb8da39068e297768c2c048448640416c665c68","sha256:4132cf5f5345cb55ee2ccfb6e48efe74fd895ff1b005ec21bb88d4a96792c0f3"],"state_sha256":"85d8cd539e254ff5b3aa954fd5d864768c5313996395a915c8123508a222855d"}