{"paper":{"title":"HI absorption in a gravitational lens at $z \\sim 0.7645$","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Australia), F. H. Briggs (2) ((1) Kapteyn Institute, N. Kanekar (1), The Australian National University, The Netherlands (2) RSAA","submitted_at":"2003-11-03T08:10:47Z","abstract_excerpt":"We have used the Westerbork Synthesis Radio Telescope to detect HI 21cm absorption at $z \\sim 0.7645$ in the gravitational lens system towards PMN J0134-0931. The 21cm profile has two broad components, with peak optical depths of $0.047 \\pm 0.007$ and $0.039 \\pm 0.007$, at heliocentric redshifts $0.76470 \\pm 0.00006$ and $0.76348 \\pm 0.00006$, respectively. The redshift of the stronger component matches that of CaII H and K absorption detected earlier. The absorption has a total velocity width of $\\sim 500$ km/s (between nulls) and an equivalent width of $7.1 \\pm 0.08$ km/s. This would imply a"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0311021","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/astro-ph/0311021/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"}