{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:EEW5DMD6HTHBWKGRR44JRGO5UQ","short_pith_number":"pith:EEW5DMD6","schema_version":"1.0","canonical_sha256":"212dd1b07e3cce1b28d18f389899dda40934dc781c74693e0f2e22a3120431fd","source":{"kind":"arxiv","id":"1810.11064","version":1},"attestation_state":"computed","paper":{"title":"Cold gas in the early Universe. Survey for neutral atomic-carbon in GRB host galaxies at 1 < z < 6 from optical afterglow spectroscopy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. De Cia, C. Ledoux, D. B. Malesani, D. Watson, J. Bolmer, J. Japelj, J.-K. Krogager, J. P. U. Fynbo, K. E. Heintz, L. Kaper, N. R. Tanvir, P. Jakobsson, P. M{\\o}ller, P. Noterdaeme, S. Covino, S. D. Vergani, T. Zafar","submitted_at":"2018-10-25T18:44:53Z","abstract_excerpt":"We present a survey for neutral atomic-carbon (CI) along gamma-ray burst (GRB) sightlines, which probes the shielded neutral gas-phase in the interstellar medium (ISM) of GRB host galaxies at high redshift. We compile a sample of 29 medium- to high-resolution GRB optical afterglow spectra spanning a redshift range through most of cosmic time from $1 < z < 6$. We find that seven ($\\approx 25\\%$) of the GRBs entering our statistical sample have CI detected in absorption. It is evident that there is a strong excess of cold gas in GRB hosts compared to absorbers in quasar sightlines. We investigat"},"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":"1810.11064","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-10-25T18:44:53Z","cross_cats_sorted":[],"title_canon_sha256":"f76f4e02de6f03fc03eac4347daedd8dcd5f546f2eb33b15d176979392f82ea3","abstract_canon_sha256":"1b7cc15b10b7c514a9a8b58ea024db0e4c345037bef52c8de0fb764643c1eb3d"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:57:35.610214Z","signature_b64":"jmgARJPNZkYmbNi0K7iV8M1O354IAzTxiUG9+3dImyskvB8Fa/Jx0tESwNzVR3F3jXAD3pMw9snHmM3qi9FFAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"212dd1b07e3cce1b28d18f389899dda40934dc781c74693e0f2e22a3120431fd","last_reissued_at":"2026-05-17T23:57:35.609539Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:57:35.609539Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Cold gas in the early Universe. Survey for neutral atomic-carbon in GRB host galaxies at 1 < z < 6 from optical afterglow spectroscopy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. De Cia, C. Ledoux, D. B. Malesani, D. Watson, J. Bolmer, J. Japelj, J.-K. Krogager, J. P. U. Fynbo, K. E. Heintz, L. Kaper, N. R. Tanvir, P. Jakobsson, P. M{\\o}ller, P. Noterdaeme, S. Covino, S. D. Vergani, T. Zafar","submitted_at":"2018-10-25T18:44:53Z","abstract_excerpt":"We present a survey for neutral atomic-carbon (CI) along gamma-ray burst (GRB) sightlines, which probes the shielded neutral gas-phase in the interstellar medium (ISM) of GRB host galaxies at high redshift. We compile a sample of 29 medium- to high-resolution GRB optical afterglow spectra spanning a redshift range through most of cosmic time from $1 < z < 6$. We find that seven ($\\approx 25\\%$) of the GRBs entering our statistical sample have CI detected in absorption. It is evident that there is a strong excess of cold gas in GRB hosts compared to absorbers in quasar sightlines. We investigat"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.11064","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":"1810.11064","created_at":"2026-05-17T23:57:35.609641+00:00"},{"alias_kind":"arxiv_version","alias_value":"1810.11064v1","created_at":"2026-05-17T23:57:35.609641+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1810.11064","created_at":"2026-05-17T23:57:35.609641+00:00"},{"alias_kind":"pith_short_12","alias_value":"EEW5DMD6HTHB","created_at":"2026-05-18T12:32:22.470017+00:00"},{"alias_kind":"pith_short_16","alias_value":"EEW5DMD6HTHBWKGR","created_at":"2026-05-18T12:32:22.470017+00:00"},{"alias_kind":"pith_short_8","alias_value":"EEW5DMD6","created_at":"2026-05-18T12:32:22.470017+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/EEW5DMD6HTHBWKGRR44JRGO5UQ","json":"https://pith.science/pith/EEW5DMD6HTHBWKGRR44JRGO5UQ.json","graph_json":"https://pith.science/api/pith-number/EEW5DMD6HTHBWKGRR44JRGO5UQ/graph.json","events_json":"https://pith.science/api/pith-number/EEW5DMD6HTHBWKGRR44JRGO5UQ/events.json","paper":"https://pith.science/paper/EEW5DMD6"},"agent_actions":{"view_html":"https://pith.science/pith/EEW5DMD6HTHBWKGRR44JRGO5UQ","download_json":"https://pith.science/pith/EEW5DMD6HTHBWKGRR44JRGO5UQ.json","view_paper":"https://pith.science/paper/EEW5DMD6","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1810.11064&json=true","fetch_graph":"https://pith.science/api/pith-number/EEW5DMD6HTHBWKGRR44JRGO5UQ/graph.json","fetch_events":"https://pith.science/api/pith-number/EEW5DMD6HTHBWKGRR44JRGO5UQ/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/EEW5DMD6HTHBWKGRR44JRGO5UQ/action/timestamp_anchor","attest_storage":"https://pith.science/pith/EEW5DMD6HTHBWKGRR44JRGO5UQ/action/storage_attestation","attest_author":"https://pith.science/pith/EEW5DMD6HTHBWKGRR44JRGO5UQ/action/author_attestation","sign_citation":"https://pith.science/pith/EEW5DMD6HTHBWKGRR44JRGO5UQ/action/citation_signature","submit_replication":"https://pith.science/pith/EEW5DMD6HTHBWKGRR44JRGO5UQ/action/replication_record"}},"created_at":"2026-05-17T23:57:35.609641+00:00","updated_at":"2026-05-17T23:57:35.609641+00:00"}