{"paper":{"title":"The shape of the ionizing UV background at $z\\sim 3.7$ from the metal absorption systems of Q$0000-2619$","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. Fontana, E. Giallongo, P. Molaro, S. Cristiani, S. D'Odorico, S. Savaglio","submitted_at":"1996-06-10T17:52:37Z","abstract_excerpt":"Spectra of the \\ze~$=4.12$ quasar Q$0000-2619$ have been obtained in the range $\\lambda\\lambda = 4880-8115$ \\AA~with a resolution of 13 \\kms~and signal--to--noise ratio of $s/n=15-60$ per resolution element. The mode of the distribution of the Doppler parameters for the \\lya~lines is $\\simeq 25$ \\kms. The fraction of lines with $10<b<20$ \\kms~is 17\\%. The Doppler values derived from uncontaminated \\lyb~lines are smaller than those obtained from the corresponding Ly$\\alpha$ lines, indicating the contribution of non saturated, non resolved components in the \\lya~profiles. The integrated UV backg"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9606063","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/astro-ph/9606063/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"}