{
  "bibcode": "2011GCN.11978....1D",
  "body": "A. de Ugarte Postigo (DARK/NBI), A.J. Castro-Tirado, J. Gorosabel\n(IAA-CSIC) report on behalf of a larger collaboration:\n\nWe have observed the afterglow of GRB 110422A  (Mangano et al., GCNC\n11957; Klunko et al., GCNC 11958) using the 10.4m GTC telescope located in\nLa Palma (Spain). Spectroscopic observations were performed with mean\nepoch of April 25th at 22:55 UT (3.3 days after the burst) and consisted\nof a single 1800s exposure using the R500B grating (resolution ~500).\n\nThe spectrum shows several absorption features that we identify as due to\nC IV, Al II, Al III, Fe II, Mg II, and Mg I at a redshift of\n1.770+/-0.001, consistent with the results of Malesani et al. (GCNC\n11977). We hence confirm this to be the redshift of the GRB.\n\nWe acknowledge excellent support from the GTC staff, in particular Rene\nRuten.",
  "circularId": 11978,
  "createdOn": 1303839298000,
  "email": "deugarte@iaa.es",
  "subject": "GRB 110422A: Redshift confirmation from GTC",
  "submitter": "Antonio Deugarte at IAA-CSIC  <deugarte@iaa.es>",
  "eventId": "GRB 110422A"
}