{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2019:NJUV3SENMJ24MBLRVKJ2F4J3QM","short_pith_number":"pith:NJUV3SEN","schema_version":"1.0","canonical_sha256":"6a695dc88d6275c60571aa93a2f13b832d0dd19e5d4c10ebdab7af372d96ccbb","source":{"kind":"arxiv","id":"1901.02689","version":1},"attestation_state":"computed","paper":{"title":"Upper limits on CH$_3$OH in the HD 163296 protoplanetary disk: evidence for a low gas-phase CH$_3$OH/H$_2$CO ratio","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"C. Qi, C. Walsh, E.C. Fayolle, J.M. Carpenter, K.I. \\\"Oberg, L.I. Cleeves, M.R. Hogerheijde, M.T. Carney, V.V. Guzm\\'an","submitted_at":"2019-01-09T12:21:42Z","abstract_excerpt":"Methanol (CH$_3$OH) is at the root of organic ice chemistry in protoplanetary disks. However, its weak emission has made detections difficult. To date, gas-phase CH$_3$OH has been detected in only one Class II disk, TW Hya. We use the Atacama Large Millimeter/submillimeter Array (ALMA) to search for a total of four CH$_3$OH emission lines in bands 6 and 7 toward the disk around the young Herbig Ae star HD 163296. The disk-averaged column density of methanol and its related species formaldehyde (H$_2$CO) are estimated assuming optically thin emission in local thermodynamic equilibrium. We compa"},"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":"1901.02689","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-01-09T12:21:42Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"b97f1254d7ec42d3eb959b9e26dd07fa13953a081a2e766ed9613c792a71f381","abstract_canon_sha256":"897c1155fca975cc77192e16a545a73383d52f3477b5378929e7194cbc62a111"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:50:56.158755Z","signature_b64":"OJhlCdZV0a0vPtQlQGnetUpqH7u+ayOQf+kUyPDamcgBHj001vHRxBWswtmQdNK+9BnvFWMltgYA45rIP7bpAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6a695dc88d6275c60571aa93a2f13b832d0dd19e5d4c10ebdab7af372d96ccbb","last_reissued_at":"2026-05-17T23:50:56.158018Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:50:56.158018Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Upper limits on CH$_3$OH in the HD 163296 protoplanetary disk: evidence for a low gas-phase CH$_3$OH/H$_2$CO ratio","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"C. Qi, C. Walsh, E.C. Fayolle, J.M. Carpenter, K.I. \\\"Oberg, L.I. Cleeves, M.R. Hogerheijde, M.T. Carney, V.V. Guzm\\'an","submitted_at":"2019-01-09T12:21:42Z","abstract_excerpt":"Methanol (CH$_3$OH) is at the root of organic ice chemistry in protoplanetary disks. However, its weak emission has made detections difficult. To date, gas-phase CH$_3$OH has been detected in only one Class II disk, TW Hya. We use the Atacama Large Millimeter/submillimeter Array (ALMA) to search for a total of four CH$_3$OH emission lines in bands 6 and 7 toward the disk around the young Herbig Ae star HD 163296. The disk-averaged column density of methanol and its related species formaldehyde (H$_2$CO) are estimated assuming optically thin emission in local thermodynamic equilibrium. We compa"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.02689","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":"1901.02689","created_at":"2026-05-17T23:50:56.158135+00:00"},{"alias_kind":"arxiv_version","alias_value":"1901.02689v1","created_at":"2026-05-17T23:50:56.158135+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.02689","created_at":"2026-05-17T23:50:56.158135+00:00"},{"alias_kind":"pith_short_12","alias_value":"NJUV3SENMJ24","created_at":"2026-05-18T12:33:24.271573+00:00"},{"alias_kind":"pith_short_16","alias_value":"NJUV3SENMJ24MBLR","created_at":"2026-05-18T12:33:24.271573+00:00"},{"alias_kind":"pith_short_8","alias_value":"NJUV3SEN","created_at":"2026-05-18T12:33:24.271573+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/NJUV3SENMJ24MBLRVKJ2F4J3QM","json":"https://pith.science/pith/NJUV3SENMJ24MBLRVKJ2F4J3QM.json","graph_json":"https://pith.science/api/pith-number/NJUV3SENMJ24MBLRVKJ2F4J3QM/graph.json","events_json":"https://pith.science/api/pith-number/NJUV3SENMJ24MBLRVKJ2F4J3QM/events.json","paper":"https://pith.science/paper/NJUV3SEN"},"agent_actions":{"view_html":"https://pith.science/pith/NJUV3SENMJ24MBLRVKJ2F4J3QM","download_json":"https://pith.science/pith/NJUV3SENMJ24MBLRVKJ2F4J3QM.json","view_paper":"https://pith.science/paper/NJUV3SEN","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1901.02689&json=true","fetch_graph":"https://pith.science/api/pith-number/NJUV3SENMJ24MBLRVKJ2F4J3QM/graph.json","fetch_events":"https://pith.science/api/pith-number/NJUV3SENMJ24MBLRVKJ2F4J3QM/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/NJUV3SENMJ24MBLRVKJ2F4J3QM/action/timestamp_anchor","attest_storage":"https://pith.science/pith/NJUV3SENMJ24MBLRVKJ2F4J3QM/action/storage_attestation","attest_author":"https://pith.science/pith/NJUV3SENMJ24MBLRVKJ2F4J3QM/action/author_attestation","sign_citation":"https://pith.science/pith/NJUV3SENMJ24MBLRVKJ2F4J3QM/action/citation_signature","submit_replication":"https://pith.science/pith/NJUV3SENMJ24MBLRVKJ2F4J3QM/action/replication_record"}},"created_at":"2026-05-17T23:50:56.158135+00:00","updated_at":"2026-05-17T23:50:56.158135+00:00"}