{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:DRHKHMAEZVW45QSPCLF3ESN2YL","short_pith_number":"pith:DRHKHMAE","schema_version":"1.0","canonical_sha256":"1c4ea3b004cd6dcec24f12cbb249bac2cfd54f670af8233ac753c35b1d673711","source":{"kind":"arxiv","id":"1811.00838","version":1},"attestation_state":"computed","paper":{"title":"Millimeter line observations toward four local galaxies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Fei Li, Junzhi Wang, Minzhi Kong, Shanghuo Li","submitted_at":"2018-11-02T12:42:46Z","abstract_excerpt":"We present results of millimeter line observations toward four local gas-rich galaxies (NGC 3079, NGC 4258, NGC 6240 and VII Zw 31) with the IRAM 30 meter millimeter telescope. More than 33 lines in these four sources were detected, including normal dense gas tracers (HCN 1-0, HCO$^+$ 1-0, and C$_2$H 1-0, etc) and their isotopic species. H$^{13}$CN (1-0) and H$^{13}$CO$^+$ (1-0) are detected for the first time in NGC 4258. Optical depths of HCN 1-0 and HCO$^{+}$ 1-0 were estimated with detected isotopic lines in NGC 4258, which were 4.1 and 2.6, respectively. HC$_3$N $J=29-28$, which requires "},"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":"1811.00838","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-11-02T12:42:46Z","cross_cats_sorted":[],"title_canon_sha256":"7d1bab0c81512f840444fedf22ae77d4d596401b9a4b3a1f5c14dc4218110112","abstract_canon_sha256":"3580a9c539d0db41dfa7f230fcd194e62ebd0c57c2cb81a025ca667aad922783"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:01:42.011053Z","signature_b64":"lSp3TQfVcCkswqIYGnoiEDTmilFWMbK6XrMcw6gnxbNEzPIAGclilgyhCabi/SlzFhK7n+nqrZ8PVRYTt1XxCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1c4ea3b004cd6dcec24f12cbb249bac2cfd54f670af8233ac753c35b1d673711","last_reissued_at":"2026-05-18T00:01:42.010539Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:01:42.010539Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Millimeter line observations toward four local galaxies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Fei Li, Junzhi Wang, Minzhi Kong, Shanghuo Li","submitted_at":"2018-11-02T12:42:46Z","abstract_excerpt":"We present results of millimeter line observations toward four local gas-rich galaxies (NGC 3079, NGC 4258, NGC 6240 and VII Zw 31) with the IRAM 30 meter millimeter telescope. More than 33 lines in these four sources were detected, including normal dense gas tracers (HCN 1-0, HCO$^+$ 1-0, and C$_2$H 1-0, etc) and their isotopic species. H$^{13}$CN (1-0) and H$^{13}$CO$^+$ (1-0) are detected for the first time in NGC 4258. Optical depths of HCN 1-0 and HCO$^{+}$ 1-0 were estimated with detected isotopic lines in NGC 4258, which were 4.1 and 2.6, respectively. HC$_3$N $J=29-28$, which requires "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1811.00838","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":"1811.00838","created_at":"2026-05-18T00:01:42.010608+00:00"},{"alias_kind":"arxiv_version","alias_value":"1811.00838v1","created_at":"2026-05-18T00:01:42.010608+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1811.00838","created_at":"2026-05-18T00:01:42.010608+00:00"},{"alias_kind":"pith_short_12","alias_value":"DRHKHMAEZVW4","created_at":"2026-05-18T12:32:19.392346+00:00"},{"alias_kind":"pith_short_16","alias_value":"DRHKHMAEZVW45QSP","created_at":"2026-05-18T12:32:19.392346+00:00"},{"alias_kind":"pith_short_8","alias_value":"DRHKHMAE","created_at":"2026-05-18T12:32:19.392346+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/DRHKHMAEZVW45QSPCLF3ESN2YL","json":"https://pith.science/pith/DRHKHMAEZVW45QSPCLF3ESN2YL.json","graph_json":"https://pith.science/api/pith-number/DRHKHMAEZVW45QSPCLF3ESN2YL/graph.json","events_json":"https://pith.science/api/pith-number/DRHKHMAEZVW45QSPCLF3ESN2YL/events.json","paper":"https://pith.science/paper/DRHKHMAE"},"agent_actions":{"view_html":"https://pith.science/pith/DRHKHMAEZVW45QSPCLF3ESN2YL","download_json":"https://pith.science/pith/DRHKHMAEZVW45QSPCLF3ESN2YL.json","view_paper":"https://pith.science/paper/DRHKHMAE","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1811.00838&json=true","fetch_graph":"https://pith.science/api/pith-number/DRHKHMAEZVW45QSPCLF3ESN2YL/graph.json","fetch_events":"https://pith.science/api/pith-number/DRHKHMAEZVW45QSPCLF3ESN2YL/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/DRHKHMAEZVW45QSPCLF3ESN2YL/action/timestamp_anchor","attest_storage":"https://pith.science/pith/DRHKHMAEZVW45QSPCLF3ESN2YL/action/storage_attestation","attest_author":"https://pith.science/pith/DRHKHMAEZVW45QSPCLF3ESN2YL/action/author_attestation","sign_citation":"https://pith.science/pith/DRHKHMAEZVW45QSPCLF3ESN2YL/action/citation_signature","submit_replication":"https://pith.science/pith/DRHKHMAEZVW45QSPCLF3ESN2YL/action/replication_record"}},"created_at":"2026-05-18T00:01:42.010608+00:00","updated_at":"2026-05-18T00:01:42.010608+00:00"}