{
  "bibcode": "2011GCN.11834....1T",
  "body": "C.C. Thoene, J. Gorosabel (IAA-CSIC), A. de Ugarte Postigo (DARK/NBI), R.\nSanchez-Ramirez (IAA-CSIC), T. Mu�oz-Dar�as (OAB-INAF), S. Guziy and A.J.\nCastro-Tirado (IAA-CSIC) report on behalf of a larger collaboration:\n\nWe observed the field of GRB 110328A / Swift J164449.3+573451 (Cummings et\nal. GCNC 11823) using the 10.4m GTC telescope in Roque de los Muchachos\nObservatory (La Palma, Spain). We identified the optical counterpart\n(Cenko et al. GCNC 11827, Leloudas et al. GCNC 11830) and obtained\nlow-resolution spectroscopy of the source. The observations consisted in\n3x1200s exposures with the R300B grating starting at 4:40 UT of the 29th\nMarch, 15.7h after the first BAT trigger).\n\nIn the spectrum we detect a good signal continuum from 4000 to 10000 A\nwith several emission lines superposed, which we identify as [OII],\n[OIII], Hbeta and Halpha at a common redshift of 0.354, consistent with\nthe value reported by Levan et al. (GCNC 11833).\n\nWe acknowledge the excellent support from the GTC staff.",
  "circularId": 11834,
  "createdOn": 1301416128000,
  "email": "deugarte@iaa.es",
  "subject": "GRB 110328A / Swift J164449.3+573451: optical spectroscopy from GTC",
  "submitter": "Antonio Deugarte at IAA-CSIC  <deugarte@iaa.es>",
  "eventId": "GRB 110328A"
}