{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2013:JIRFNKSFCD5B3ITJJE5LVYZTBW","short_pith_number":"pith:JIRFNKSF","schema_version":"1.0","canonical_sha256":"4a2256aa4510fa1da269493abae3330d99b56d92e61452d13dce274291d94467","source":{"kind":"arxiv","id":"1309.4229","version":1},"attestation_state":"computed","paper":{"title":"CO rotational line emission from a dense knot in Cas A Evidence for active post-reverse-shock chemistry","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Alexander G. G. M. Tielens, Chiara Biscaro, Francisco Salgado, Isabelle Cherchneff, Jeonghee Rho, John H. Black, Olivier Bern\\'e, S\\'ebastien Muller, Sofia H. J. Wallstr\\\"om","submitted_at":"2013-09-17T08:44:48Z","abstract_excerpt":"We report a Herschel detection of high-J rotational CO lines from a dense knot in the supernova remnant Cas A. Based on a combined analysis of these rotational lines, and previously observed ro-vibrational CO lines, we find the gas to be warm (two components at 400 and 2000 K) and dense (1e6-7 cm-3), with a CO column density of 5e17 cm-2. This, along with the broad line widths (400 kms-1), suggests that the CO emission originates in the post-shock region of the reverse shock. As the passage of the reverse shock dissociates any existing molecules, the CO has most likely reformed in the last few"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1309.4229","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-09-17T08:44:48Z","cross_cats_sorted":[],"title_canon_sha256":"580621e6b948bfebd7bf9b3ed5da7080829f9757f4b713383deae13c48e289d8","abstract_canon_sha256":"94dae635145bc751e3039b2f2880c91e14ad0a622d475d2aa730fe05617f794f"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:47:36.784715Z","signature_b64":"oeWHsQ+MHP7U75PvxDQZey4GOqXxddjVrDwaAd7HLn3Oa3IvC5TdwEN9LWKyCDib/p4vfn1qyF1KytfH0WFwBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4a2256aa4510fa1da269493abae3330d99b56d92e61452d13dce274291d94467","last_reissued_at":"2026-05-18T01:47:36.784148Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:47:36.784148Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"CO rotational line emission from a dense knot in Cas A Evidence for active post-reverse-shock chemistry","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Alexander G. G. M. Tielens, Chiara Biscaro, Francisco Salgado, Isabelle Cherchneff, Jeonghee Rho, John H. Black, Olivier Bern\\'e, S\\'ebastien Muller, Sofia H. J. Wallstr\\\"om","submitted_at":"2013-09-17T08:44:48Z","abstract_excerpt":"We report a Herschel detection of high-J rotational CO lines from a dense knot in the supernova remnant Cas A. Based on a combined analysis of these rotational lines, and previously observed ro-vibrational CO lines, we find the gas to be warm (two components at 400 and 2000 K) and dense (1e6-7 cm-3), with a CO column density of 5e17 cm-2. This, along with the broad line widths (400 kms-1), suggests that the CO emission originates in the post-shock region of the reverse shock. As the passage of the reverse shock dissociates any existing molecules, the CO has most likely reformed in the last few"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1309.4229","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"aliases":[{"alias_kind":"arxiv","alias_value":"1309.4229","created_at":"2026-05-18T01:47:36.784227+00:00"},{"alias_kind":"arxiv_version","alias_value":"1309.4229v1","created_at":"2026-05-18T01:47:36.784227+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1309.4229","created_at":"2026-05-18T01:47:36.784227+00:00"},{"alias_kind":"pith_short_12","alias_value":"JIRFNKSFCD5B","created_at":"2026-05-18T12:27:49.015174+00:00"},{"alias_kind":"pith_short_16","alias_value":"JIRFNKSFCD5B3ITJ","created_at":"2026-05-18T12:27:49.015174+00:00"},{"alias_kind":"pith_short_8","alias_value":"JIRFNKSF","created_at":"2026-05-18T12:27:49.015174+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/JIRFNKSFCD5B3ITJJE5LVYZTBW","json":"https://pith.science/pith/JIRFNKSFCD5B3ITJJE5LVYZTBW.json","graph_json":"https://pith.science/api/pith-number/JIRFNKSFCD5B3ITJJE5LVYZTBW/graph.json","events_json":"https://pith.science/api/pith-number/JIRFNKSFCD5B3ITJJE5LVYZTBW/events.json","paper":"https://pith.science/paper/JIRFNKSF"},"agent_actions":{"view_html":"https://pith.science/pith/JIRFNKSFCD5B3ITJJE5LVYZTBW","download_json":"https://pith.science/pith/JIRFNKSFCD5B3ITJJE5LVYZTBW.json","view_paper":"https://pith.science/paper/JIRFNKSF","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1309.4229&json=true","fetch_graph":"https://pith.science/api/pith-number/JIRFNKSFCD5B3ITJJE5LVYZTBW/graph.json","fetch_events":"https://pith.science/api/pith-number/JIRFNKSFCD5B3ITJJE5LVYZTBW/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/JIRFNKSFCD5B3ITJJE5LVYZTBW/action/timestamp_anchor","attest_storage":"https://pith.science/pith/JIRFNKSFCD5B3ITJJE5LVYZTBW/action/storage_attestation","attest_author":"https://pith.science/pith/JIRFNKSFCD5B3ITJJE5LVYZTBW/action/author_attestation","sign_citation":"https://pith.science/pith/JIRFNKSFCD5B3ITJJE5LVYZTBW/action/citation_signature","submit_replication":"https://pith.science/pith/JIRFNKSFCD5B3ITJJE5LVYZTBW/action/replication_record"}},"created_at":"2026-05-18T01:47:36.784227+00:00","updated_at":"2026-05-18T01:47:36.784227+00:00"}