{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2016:5AVSYN3WY2P56NWS5FAROMH73S","short_pith_number":"pith:5AVSYN3W","schema_version":"1.0","canonical_sha256":"e82b2c3776c69fdf36d2e9411730ffdc846f40e80ddf60c3f77af8285b06bd06","source":{"kind":"arxiv","id":"1601.06782","version":3},"attestation_state":"computed","paper":{"title":"Molecular Hydrogen Absorption from the Halo of a z ~ 0.4 Galaxy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Aus), Christopher W. Churchill (NMSU, Glenn G. Kacprzak (Swinburne, Jane C. Charlton (PSU, Sowgat Muzahid (PSU, USA)","submitted_at":"2016-01-25T21:00:00Z","abstract_excerpt":"Lyman- and Werner-band absorption of molecular hydrogen (H$_2$) is detected in $\\sim$50% of low redshift ($z<1$) DLAs/sub-DLAs with $N$(H$_2$) > 10$^{14.4}$ cm$^{-2}$. However the true origin(s) of the H$_2$ bearing gas remain elusive. Here we report a new detection of an H$_{2}$ absorber at $z=$ 0.4298 in the HST/COS spectra of quasar PKS 2128-123. The total $N$(HI) of 10$^{19.50\\pm0.15}$ cm$^{-2}$ classifies the absorber as a sub-DLA. H$_{2}$ absorption is detected up to the $J=3$ rotational level with a total $\\log N$(H$_{2}$) = 16.36$\\pm$0.08 corresponding to a molecular fraction of log $f"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1601.06782","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-01-25T21:00:00Z","cross_cats_sorted":[],"title_canon_sha256":"59e9c85dd732d729d3b62052090fcc9a7f09f2323af2a5253db313bcd8b29b7a","abstract_canon_sha256":"1c12a8758a41295f9f8cd6a14a70526b0080b0a1b6feaa66d77e9244ceca68b8"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:13:15.516665Z","signature_b64":"T3YT3dWZoJ/JCtceUSBHSJQTgrfOxnN/ShO8Smzm14Rmr83Sf4HyyLToQHPaJip3q2P1V1gYXVHEYc8EfdH0BA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e82b2c3776c69fdf36d2e9411730ffdc846f40e80ddf60c3f77af8285b06bd06","last_reissued_at":"2026-05-18T01:13:15.516230Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:13:15.516230Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Molecular Hydrogen Absorption from the Halo of a z ~ 0.4 Galaxy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Aus), Christopher W. Churchill (NMSU, Glenn G. Kacprzak (Swinburne, Jane C. Charlton (PSU, Sowgat Muzahid (PSU, USA)","submitted_at":"2016-01-25T21:00:00Z","abstract_excerpt":"Lyman- and Werner-band absorption of molecular hydrogen (H$_2$) is detected in $\\sim$50% of low redshift ($z<1$) DLAs/sub-DLAs with $N$(H$_2$) > 10$^{14.4}$ cm$^{-2}$. However the true origin(s) of the H$_2$ bearing gas remain elusive. Here we report a new detection of an H$_{2}$ absorber at $z=$ 0.4298 in the HST/COS spectra of quasar PKS 2128-123. The total $N$(HI) of 10$^{19.50\\pm0.15}$ cm$^{-2}$ classifies the absorber as a sub-DLA. H$_{2}$ absorption is detected up to the $J=3$ rotational level with a total $\\log N$(H$_{2}$) = 16.36$\\pm$0.08 corresponding to a molecular fraction of log $f"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1601.06782","kind":"arxiv","version":3},"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":"1601.06782","created_at":"2026-05-18T01:13:15.516292+00:00"},{"alias_kind":"arxiv_version","alias_value":"1601.06782v3","created_at":"2026-05-18T01:13:15.516292+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1601.06782","created_at":"2026-05-18T01:13:15.516292+00:00"},{"alias_kind":"pith_short_12","alias_value":"5AVSYN3WY2P5","created_at":"2026-05-18T12:29:58.707656+00:00"},{"alias_kind":"pith_short_16","alias_value":"5AVSYN3WY2P56NWS","created_at":"2026-05-18T12:29:58.707656+00:00"},{"alias_kind":"pith_short_8","alias_value":"5AVSYN3W","created_at":"2026-05-18T12:29:58.707656+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/5AVSYN3WY2P56NWS5FAROMH73S","json":"https://pith.science/pith/5AVSYN3WY2P56NWS5FAROMH73S.json","graph_json":"https://pith.science/api/pith-number/5AVSYN3WY2P56NWS5FAROMH73S/graph.json","events_json":"https://pith.science/api/pith-number/5AVSYN3WY2P56NWS5FAROMH73S/events.json","paper":"https://pith.science/paper/5AVSYN3W"},"agent_actions":{"view_html":"https://pith.science/pith/5AVSYN3WY2P56NWS5FAROMH73S","download_json":"https://pith.science/pith/5AVSYN3WY2P56NWS5FAROMH73S.json","view_paper":"https://pith.science/paper/5AVSYN3W","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1601.06782&json=true","fetch_graph":"https://pith.science/api/pith-number/5AVSYN3WY2P56NWS5FAROMH73S/graph.json","fetch_events":"https://pith.science/api/pith-number/5AVSYN3WY2P56NWS5FAROMH73S/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/5AVSYN3WY2P56NWS5FAROMH73S/action/timestamp_anchor","attest_storage":"https://pith.science/pith/5AVSYN3WY2P56NWS5FAROMH73S/action/storage_attestation","attest_author":"https://pith.science/pith/5AVSYN3WY2P56NWS5FAROMH73S/action/author_attestation","sign_citation":"https://pith.science/pith/5AVSYN3WY2P56NWS5FAROMH73S/action/citation_signature","submit_replication":"https://pith.science/pith/5AVSYN3WY2P56NWS5FAROMH73S/action/replication_record"}},"created_at":"2026-05-18T01:13:15.516292+00:00","updated_at":"2026-05-18T01:13:15.516292+00:00"}