{"paper":{"title":"The metallicity and dust content of a redshift 5 gamma-ray burst host galaxy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"A. de Ugarte Postigo, A. J. Levan, B. Milvang-Jensen, D. J. Watson, D. Malesani, H. Flores, J. Greiner, J. Hjorth, J. P. U. Fynbo, J. Sollerman, K. Wiersema, L. Kaper, M. Nardini, M. Sparre, N. R. Tanvir, O. E. Hartoog, P. Goldoni, P. Jakobsson, P. M. J. Afonso, R. A. M. J. Wijers, R. S\\'anchez-Ram\\'irez, S. Covino, S. D. Vergani, S. Klose, S. Piranomonte, S. Schulze, T. Kr\\\"uhler, T. Zafar, V. D'Elia","submitted_at":"2013-09-11T20:00:00Z","abstract_excerpt":"Observations of the afterglows of long gamma-ray bursts (GRBs) allow the study of star-forming galaxies across most of cosmic history. Here we present observations of GRB 111008A from which we can measure metallicity, chemical abundance patterns, dust-to-metals ratio and extinction of the GRB host galaxy at z=5.0. The host absorption system is a damped Lyman-alpha absorber (DLA) with a very large neutral hydrogen column density of log N(HI)/cm^(-2) = 22.30 +/- 0.06, and a metallicity of [S/H]= -1.70 +/- 0.10. It is the highest redshift GRB with such a precise metallicity measurement. The prese"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1309.2940","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"}