{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:6R5AKLZL4EP7T3ZWCIOU75XIUX","short_pith_number":"pith:6R5AKLZL","schema_version":"1.0","canonical_sha256":"f47a052f2be11ff9ef36121d4ff6e8a5d5a8163a79420add4eaac3a81f575681","source":{"kind":"arxiv","id":"1806.04922","version":1},"attestation_state":"computed","paper":{"title":"Galactic HCO+ Absorption toward Compact Extragalactic Radio Sources","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Bon-Chul Koo, Carl E. Heiles, Do-Young Byun, Geumsook Park, Kee-Tae Kim","submitted_at":"2018-06-13T10:04:20Z","abstract_excerpt":"As part of the search for the \"dark molecular gas (DMG),\" we report on the results of HCO$^+$ J = 1-0 absorption observations toward nine bright extragalactic millimeter wave continuum sources. The extragalactic sources are at high Galactic latitudes (|b| > 10$\\deg$) and seen at small extinction (E(B-V) $\\lesssim$ 0.1 mag). We have detected the HCO$^+$ absorption lines toward two sources, B0838+133 and B2251+158. The absorption toward B2251+158 was previously reported, while the absorption toward B0838+133 is a new detection. We derive hydrogen column densities or their upper limits toward the"},"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":"1806.04922","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-06-13T10:04:20Z","cross_cats_sorted":[],"title_canon_sha256":"8aceee52882e4fb89ff3fe0fb8028e13155ec54c2ba08f65ee20c8be034b494d","abstract_canon_sha256":"ac416fb34fdbc51cac2e39460111a628b0efb7964a7825697d74ffebe61154a6"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:11:33.302504Z","signature_b64":"4y7p9bS0lN3fxEPb+iPcETOJVvyfdeo8tLl0sRoW/yfJ6I8Zl/2PqCYzKYpqlTc+Ir5t1bEuRr1Spyw1VZWOAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f47a052f2be11ff9ef36121d4ff6e8a5d5a8163a79420add4eaac3a81f575681","last_reissued_at":"2026-05-18T00:11:33.301853Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:11:33.301853Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Galactic HCO+ Absorption toward Compact Extragalactic Radio Sources","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Bon-Chul Koo, Carl E. Heiles, Do-Young Byun, Geumsook Park, Kee-Tae Kim","submitted_at":"2018-06-13T10:04:20Z","abstract_excerpt":"As part of the search for the \"dark molecular gas (DMG),\" we report on the results of HCO$^+$ J = 1-0 absorption observations toward nine bright extragalactic millimeter wave continuum sources. The extragalactic sources are at high Galactic latitudes (|b| > 10$\\deg$) and seen at small extinction (E(B-V) $\\lesssim$ 0.1 mag). We have detected the HCO$^+$ absorption lines toward two sources, B0838+133 and B2251+158. The absorption toward B2251+158 was previously reported, while the absorption toward B0838+133 is a new detection. We derive hydrogen column densities or their upper limits toward the"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1806.04922","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":"1806.04922","created_at":"2026-05-18T00:11:33.301957+00:00"},{"alias_kind":"arxiv_version","alias_value":"1806.04922v1","created_at":"2026-05-18T00:11:33.301957+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1806.04922","created_at":"2026-05-18T00:11:33.301957+00:00"},{"alias_kind":"pith_short_12","alias_value":"6R5AKLZL4EP7","created_at":"2026-05-18T12:32:11.075285+00:00"},{"alias_kind":"pith_short_16","alias_value":"6R5AKLZL4EP7T3ZW","created_at":"2026-05-18T12:32:11.075285+00:00"},{"alias_kind":"pith_short_8","alias_value":"6R5AKLZL","created_at":"2026-05-18T12:32:11.075285+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/6R5AKLZL4EP7T3ZWCIOU75XIUX","json":"https://pith.science/pith/6R5AKLZL4EP7T3ZWCIOU75XIUX.json","graph_json":"https://pith.science/api/pith-number/6R5AKLZL4EP7T3ZWCIOU75XIUX/graph.json","events_json":"https://pith.science/api/pith-number/6R5AKLZL4EP7T3ZWCIOU75XIUX/events.json","paper":"https://pith.science/paper/6R5AKLZL"},"agent_actions":{"view_html":"https://pith.science/pith/6R5AKLZL4EP7T3ZWCIOU75XIUX","download_json":"https://pith.science/pith/6R5AKLZL4EP7T3ZWCIOU75XIUX.json","view_paper":"https://pith.science/paper/6R5AKLZL","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1806.04922&json=true","fetch_graph":"https://pith.science/api/pith-number/6R5AKLZL4EP7T3ZWCIOU75XIUX/graph.json","fetch_events":"https://pith.science/api/pith-number/6R5AKLZL4EP7T3ZWCIOU75XIUX/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/6R5AKLZL4EP7T3ZWCIOU75XIUX/action/timestamp_anchor","attest_storage":"https://pith.science/pith/6R5AKLZL4EP7T3ZWCIOU75XIUX/action/storage_attestation","attest_author":"https://pith.science/pith/6R5AKLZL4EP7T3ZWCIOU75XIUX/action/author_attestation","sign_citation":"https://pith.science/pith/6R5AKLZL4EP7T3ZWCIOU75XIUX/action/citation_signature","submit_replication":"https://pith.science/pith/6R5AKLZL4EP7T3ZWCIOU75XIUX/action/replication_record"}},"created_at":"2026-05-18T00:11:33.301957+00:00","updated_at":"2026-05-18T00:11:33.301957+00:00"}