{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:1995:O6Y7F7FFEMVFI5LRHBIMTYTHY3","short_pith_number":"pith:O6Y7F7FF","schema_version":"1.0","canonical_sha256":"77b1f2fca5232a5475713850c9e267c6e84e48b652681b561899c09c55bc8713","source":{"kind":"arxiv","id":"astro-ph/9512069","version":1},"attestation_state":"computed","paper":{"title":"A radio Search for high redshift HI absorption","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. G. de Bruyn, C. L. Carilli, Jayaram N. Chengalur, R. Braun","submitted_at":"1995-12-12T12:18:36Z","abstract_excerpt":"Ground based optical observations have yielded considerable information on the statistics of damped-lyman alpha systems. In particular these systems are known to be the dominant repository of the observed neutral gas at high redshift. However, particularly at high redshift, there is the possibility that optical observations could be biased due to the exclusion of damped-lyman alpha systems that contain moderate to significant amounts of dust. Independent observational constraints on the neutral hydrogen content at high redshifts and the amount of dust in high redshift systems can be obtained f"},"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":"astro-ph/9512069","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1995-12-12T12:18:36Z","cross_cats_sorted":[],"title_canon_sha256":"07ac0458f3dec80adb8b5d2f2c5762742a585170f6ce553f23a304603ac3f211","abstract_canon_sha256":"ea40361aa8a875b782032458b7f6fdba232f877cc313e5f5f7523af7aaf4ca26"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:21:56.687254Z","signature_b64":"S/ipxmpBzNKIKl2Ho2bF1Jks+6Gr5ngre7LqLV7M0TWe7YgFcM2iqQyswuaJBT7REc0FyCN5UpIZhs66JA0UBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"77b1f2fca5232a5475713850c9e267c6e84e48b652681b561899c09c55bc8713","last_reissued_at":"2026-05-18T01:21:56.686532Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:21:56.686532Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"A radio Search for high redshift HI absorption","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. G. de Bruyn, C. L. Carilli, Jayaram N. Chengalur, R. Braun","submitted_at":"1995-12-12T12:18:36Z","abstract_excerpt":"Ground based optical observations have yielded considerable information on the statistics of damped-lyman alpha systems. In particular these systems are known to be the dominant repository of the observed neutral gas at high redshift. However, particularly at high redshift, there is the possibility that optical observations could be biased due to the exclusion of damped-lyman alpha systems that contain moderate to significant amounts of dust. Independent observational constraints on the neutral hydrogen content at high redshifts and the amount of dust in high redshift systems can be obtained f"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9512069","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":"astro-ph/9512069","created_at":"2026-05-18T01:21:56.686654+00:00"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9512069v1","created_at":"2026-05-18T01:21:56.686654+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9512069","created_at":"2026-05-18T01:21:56.686654+00:00"},{"alias_kind":"pith_short_12","alias_value":"O6Y7F7FFEMVF","created_at":"2026-05-18T12:25:47.700082+00:00"},{"alias_kind":"pith_short_16","alias_value":"O6Y7F7FFEMVFI5LR","created_at":"2026-05-18T12:25:47.700082+00:00"},{"alias_kind":"pith_short_8","alias_value":"O6Y7F7FF","created_at":"2026-05-18T12:25:47.700082+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/O6Y7F7FFEMVFI5LRHBIMTYTHY3","json":"https://pith.science/pith/O6Y7F7FFEMVFI5LRHBIMTYTHY3.json","graph_json":"https://pith.science/api/pith-number/O6Y7F7FFEMVFI5LRHBIMTYTHY3/graph.json","events_json":"https://pith.science/api/pith-number/O6Y7F7FFEMVFI5LRHBIMTYTHY3/events.json","paper":"https://pith.science/paper/O6Y7F7FF"},"agent_actions":{"view_html":"https://pith.science/pith/O6Y7F7FFEMVFI5LRHBIMTYTHY3","download_json":"https://pith.science/pith/O6Y7F7FFEMVFI5LRHBIMTYTHY3.json","view_paper":"https://pith.science/paper/O6Y7F7FF","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=astro-ph/9512069&json=true","fetch_graph":"https://pith.science/api/pith-number/O6Y7F7FFEMVFI5LRHBIMTYTHY3/graph.json","fetch_events":"https://pith.science/api/pith-number/O6Y7F7FFEMVFI5LRHBIMTYTHY3/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/O6Y7F7FFEMVFI5LRHBIMTYTHY3/action/timestamp_anchor","attest_storage":"https://pith.science/pith/O6Y7F7FFEMVFI5LRHBIMTYTHY3/action/storage_attestation","attest_author":"https://pith.science/pith/O6Y7F7FFEMVFI5LRHBIMTYTHY3/action/author_attestation","sign_citation":"https://pith.science/pith/O6Y7F7FFEMVFI5LRHBIMTYTHY3/action/citation_signature","submit_replication":"https://pith.science/pith/O6Y7F7FFEMVFI5LRHBIMTYTHY3/action/replication_record"}},"created_at":"2026-05-18T01:21:56.686654+00:00","updated_at":"2026-05-18T01:21:56.686654+00:00"}