{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:DLU7F7RFNIJN3SJMWSQ6DCCH5J","short_pith_number":"pith:DLU7F7RF","schema_version":"1.0","canonical_sha256":"1ae9f2fe256a12ddc92cb4a1e18847ea67536610d97ba1d911fa5e8c6d487620","source":{"kind":"arxiv","id":"1806.07827","version":2},"attestation_state":"computed","paper":{"title":"Molecular gas and star formation in an absorption-selected galaxy: Hitting the bull's eye at z = 2.46","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. Ranjan, C. Ledoux, J.-K. Krogager, J. P. U. Fynbo, N. Gupta, P. Laursen, P. Noterdaeme, P. Petitjean, R. Srianand, S. Balashev, S. Bialy","submitted_at":"2018-06-20T16:22:19Z","abstract_excerpt":"We present the detection analysis of a diffuse molecular cloud at z$_{abs}$=2.4636 towards the quasar SDSS J1513+0352(z$_{em}\\,\\simeq$ 2.68) observed with the X-shooter spectrograph(VLT). We measure very high column densities of atomic and molecular hydrogen, with log N(HI,H$_2$)$\\simeq$21.8,21.3. This is the highest H$_2$ column density ever measured in an intervening damped Lyman-alpha system but we do not detect CO, implying log N(CO)/N(H$_2$) < -7.8, which could be due to a low metallicity of the cloud. From the metal absorption lines, we derive the metallicity to be Z $\\simeq$ 0.15 Z$_{\\o"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1806.07827","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-06-20T16:22:19Z","cross_cats_sorted":[],"title_canon_sha256":"f693ba02d389f3569e318b6c5aa646833da397437bc9bf048e44305e535167fa","abstract_canon_sha256":"68f35ffae8f9442bedded5f4ec3f5eeb3b8cb340b192309229613c2edc328740"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:01:29.269984Z","signature_b64":"d/PeTHSF6MQ1e7pCrEs4ASwNOPsmSAlGMeydJykhDNhtnCHvBxvMiIt+MiFAzjEor/uTrEzQMbhSLIOnlK0vBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1ae9f2fe256a12ddc92cb4a1e18847ea67536610d97ba1d911fa5e8c6d487620","last_reissued_at":"2026-05-18T00:01:29.269512Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:01:29.269512Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Molecular gas and star formation in an absorption-selected galaxy: Hitting the bull's eye at z = 2.46","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. Ranjan, C. Ledoux, J.-K. Krogager, J. P. U. Fynbo, N. Gupta, P. Laursen, P. Noterdaeme, P. Petitjean, R. Srianand, S. Balashev, S. Bialy","submitted_at":"2018-06-20T16:22:19Z","abstract_excerpt":"We present the detection analysis of a diffuse molecular cloud at z$_{abs}$=2.4636 towards the quasar SDSS J1513+0352(z$_{em}\\,\\simeq$ 2.68) observed with the X-shooter spectrograph(VLT). We measure very high column densities of atomic and molecular hydrogen, with log N(HI,H$_2$)$\\simeq$21.8,21.3. This is the highest H$_2$ column density ever measured in an intervening damped Lyman-alpha system but we do not detect CO, implying log N(CO)/N(H$_2$) < -7.8, which could be due to a low metallicity of the cloud. From the metal absorption lines, we derive the metallicity to be Z $\\simeq$ 0.15 Z$_{\\o"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1806.07827","kind":"arxiv","version":2},"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":"1806.07827","created_at":"2026-05-18T00:01:29.269581+00:00"},{"alias_kind":"arxiv_version","alias_value":"1806.07827v2","created_at":"2026-05-18T00:01:29.269581+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1806.07827","created_at":"2026-05-18T00:01:29.269581+00:00"},{"alias_kind":"pith_short_12","alias_value":"DLU7F7RFNIJN","created_at":"2026-05-18T12:32:19.392346+00:00"},{"alias_kind":"pith_short_16","alias_value":"DLU7F7RFNIJN3SJM","created_at":"2026-05-18T12:32:19.392346+00:00"},{"alias_kind":"pith_short_8","alias_value":"DLU7F7RF","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/DLU7F7RFNIJN3SJMWSQ6DCCH5J","json":"https://pith.science/pith/DLU7F7RFNIJN3SJMWSQ6DCCH5J.json","graph_json":"https://pith.science/api/pith-number/DLU7F7RFNIJN3SJMWSQ6DCCH5J/graph.json","events_json":"https://pith.science/api/pith-number/DLU7F7RFNIJN3SJMWSQ6DCCH5J/events.json","paper":"https://pith.science/paper/DLU7F7RF"},"agent_actions":{"view_html":"https://pith.science/pith/DLU7F7RFNIJN3SJMWSQ6DCCH5J","download_json":"https://pith.science/pith/DLU7F7RFNIJN3SJMWSQ6DCCH5J.json","view_paper":"https://pith.science/paper/DLU7F7RF","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1806.07827&json=true","fetch_graph":"https://pith.science/api/pith-number/DLU7F7RFNIJN3SJMWSQ6DCCH5J/graph.json","fetch_events":"https://pith.science/api/pith-number/DLU7F7RFNIJN3SJMWSQ6DCCH5J/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/DLU7F7RFNIJN3SJMWSQ6DCCH5J/action/timestamp_anchor","attest_storage":"https://pith.science/pith/DLU7F7RFNIJN3SJMWSQ6DCCH5J/action/storage_attestation","attest_author":"https://pith.science/pith/DLU7F7RFNIJN3SJMWSQ6DCCH5J/action/author_attestation","sign_citation":"https://pith.science/pith/DLU7F7RFNIJN3SJMWSQ6DCCH5J/action/citation_signature","submit_replication":"https://pith.science/pith/DLU7F7RFNIJN3SJMWSQ6DCCH5J/action/replication_record"}},"created_at":"2026-05-18T00:01:29.269581+00:00","updated_at":"2026-05-18T00:01:29.269581+00:00"}