{
  "bibcode": "2014GCN.17198....1D",
  "body": "A. de Ugarte Postigo (IAA-CSIC, DARK/NBI), C.C. Thoene (IAA-CSIC),\nJ. Gorosabel (UPV, IAA-CSIC), N. Tanvir (U. Leicester), J.P.U. Fynbo (DARK/NBI),\nP. Pesev (GRANTECAN), G. Gomez Velarde (GRANTECAN), and \nD. Perez Valladares (GRANTECAN) report on behalf of a larger collaboration\n\nWe observed the afterglow of GRB141220A (Cummings et al. GCN 17196, Gorosabel\net al. GCN 17197) with OSIRIS at the 10.4m GTC. Observations began at 6:45 UT \n(50 min after the burst). In a first 600 s spectrum obtained with grism R1000B covering \nfrom 3750 to 7800 A we detect absorption features of AlII, FeII, MgII, MgI, at a redshift \nof 1.3195, including several absorptions of FeII* which make it very likely the redshift of \nthe GRB. We also detect two MgII intervening systems at redshifts of 1.280 and 0.527.",
  "circularId": 17198,
  "createdOn": 1419062008000,
  "email": "deugarte@iaa.es",
  "subject": "GRB 141220A: Redshift from OSIRIS at the 10.4m GTC",
  "submitter": "Antonio de Ugarte Postigo at IAA-CSIC  <deugarte@iaa.es>",
  "eventId": "GRB 141220A"
}