{
  "bibcode": "2011GCN.12375....1D",
  "body": "A. de Ugarte Postigo (DARK/NBI), J. Gorosabel, A.J. Castro-Tirado and C.C.\nThoene (IAA-CSIC) report on behalf of a larger collaboration:\n\nWe have obtained spectroscopy of the afterglow of GRB 110918A (Hurley et\nal., GCN 12357, Mangano et al. GCN 12364, Tanvir et al., GCN 12365) using\nOSIRIS at the 10.4m GTC telescope at Roque de los Muchachos Observatory\n(Spain). Our data consisted of 3x900s exposures with the R500B grism, with\na resolution of ~500 obtained with an average epoch of Sep. 21.106 UT\n(53.09 hr after the burst).\n\nIn a preliminary reduction we detect absorption features of ZnII, FeII,\nMnII, MgII, MgI and CaII at a common redshift of 0.984+/-0.001, similar to\nthe one derived by Levan et al. (GCN 12368).\n\nWe acknowledge the excellent support of the GTC staff, in particular J.M.\nGonzalez Perez, A. Cabrera Lavers and B. Gerken.",
  "circularId": 12375,
  "createdOn": 1316619962000,
  "email": "deugarte@iaa.es",
  "subject": "GRB 110918A: Spectroscopy from GTC",
  "submitter": "Antonio Deugarte at IAA-CSIC  <deugarte@iaa.es>",
  "eventId": "GRB 110918A"
}