{"paper":{"title":"The mysterious optical afterglow spectrum of GRB140506A at z=0.889","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.GA","authors_text":"A. de Ugarte Postigo, A. Levan, A. Nicuesa Guelbenzu, B. Milvang-Jensen, C. C. Th\\\"one, C. Ledoux, D. Malesani, D. Watson, D. Xu, E. Pian, F. Hammer, F. Knust, G. Leloudas, G. Tagliaferri, H. Flores, J. Bolmer, J. Greiner, J. Hjorth, J. Japelj, J. P. U. Fynbo, K. Leighly, K. Wiersema, L. Christensen, L. Kaper, M. Friis, M. Sparre, N. Tanvir, P. Goldoni, P. Jakobsson, P. M{\\o}ller, P. M. Vreeswijk, P. Noterdaeme, P. Schady, R. A. M. J. Wijers, S. Covino, S. Klose, S. Oates, S. Schulze, S. Vergani, T. Kr\\\"uhler, T. Zafar, V. D'Elia, Z. Cano","submitted_at":"2014-09-17T12:53:03Z","abstract_excerpt":"Context. Gamma-ray burst (GRBs) afterglows probe sightlines to star-forming regions in distant star-forming galaxies. Here we present a study of the peculiar afterglow spectrum of the z = 0.889 Swift GRB 140506A. Aims. Our aim is to understand the origin of the very unusual properties of the absorption along the line-of-sight. Methods. We analyse spectroscopic observations obtained with the X-shooter spectrograph mounted on the ESO/VLT at two epochs 8.8 h and 33 h after the burst as well as imaging from the GROND instrument. We also present imaging and spectroscopy of the host galaxy obtained "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1409.4975","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"}