{"paper":{"title":"On the Incidence of Strong MgII Absorbers Along GRB Sightlines","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"(2) U Chicago, (3) UC Berkeley, (4) Observatoire de Geneve, (5) Universidad de Chile, (6) IoA, (7) Harvard), A. K. Dupree (7), G.E. Prochter (1), H.-W. Chen (2), J. S. Bloom (3), J.X. Prochaska (1), M. Dessauges-Zavadsky (4), M. Pettini (6), P. Guhathakurta (1) ((1) UCO/Lick Observatory, R. J. Foley (3), S. Lopez (5)","submitted_at":"2006-05-02T20:40:27Z","abstract_excerpt":"We report on a survey for strong (rest equivalent width W_r >= 1A), intervening MgII systems along the sightlines to long-duration gamma-ray bursts (GRBs). The GRB spectra which comprise the survey have a heterogeneous mix of resolution and wavelength coverage, but we implement a strict, uniform set of search criteria to derive a well-defined statistical sample. We identify 15 strong MgII absorbers along 14 GRB sightlines (nearly every sightline exhibits at least one absorber) with spectra covering a total pathlength Delta z = 15.5 at a mean redshift <z> = 1.1. In contrast, the predicted incid"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0605075","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":""},"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"}