{
  "bibcode": "2013GCN.14685....1S",
  "body": "R. S�nchez-Ram�rez (IAA-CSIC), J. Gorosabel (UPV-EHU, IAA-CSIC), A. J.\nCastro-Tirado (IAA-CSIC), J. Cepa and G. G�mez-Velarde (IAC), on behalf of\na larger collaboration, report:\n\nWe observed the location of the Fermi GRB 130518A (Xiong et al. GCNC 14674,\nOmodei et al. GCNC 14675) -also detected by Swift and Konus (Cummings et\nal. GCNC 14676, Golenetskii et al. GCNC 14677)- with the OSIRIS\nspectrograph mounted at the 10.4m GTC located at Roque de los\nMuchachos Observatory (La Palma, Spain). Observations began on May 20.1995\nUT (i.e. 38.9 hr post burst). The optical afterglow (Evans et al. GCNC\n14678, Troja et al. GCNC 14579) is well detected with the blue (R1000B)\ngrism and in the resulting spectrum we see a strong, broad damped-Lya\nabsorption feature at ~4100A, combined with many metal lines including\nSII, SiII, CII, SiIV, CIV, FeII, AlII and AlIII at a common redshift of\nz=2.49.\n\nWe thank E. Troja and the RATIR Team for providing the ID-chart.\n\n[GCN OPS NOTE(20may13): Per author's request, (a) the \"40.9 hr post burst\"\nwas changed to \"38.9 hr post burst\", and (b) the \"We thank E. Troja\"\nwas changed to \"We thank E. Troja and the RATIR Team\".]",
  "circularId": 14685,
  "createdOn": 1369063924000,
  "email": "ajct@iaa.es",
  "subject": "GRB 130518A: 10.4m GTC/OSIRIS redshift",
  "submitter": "Alberto Castro-Tirado at Inst.de Astro. de Andalucia  <ajct@iaa.es>",
  "eventId": "GRB 130518A"
}