{
  "bibcode": "2012GCN.13930....1K",
  "body": "T. Kruehler (DARK), N. R. Tanvir (U. Leicester), A. de Ugarte Postigo (IAA-CSIC and DARK/NBI),\nD. Malesani (DARK), J. Fynbo (DARK), A. Melandri (INAF-OAB), A. J. Levan (U. Warwick), \nK. Wiersema (U. Leicester), S. Schulze (PUC and MCSS), P. Goldoni (APC,CEA/Irfu), \nH. Flores (Obs. Paris) and L. Kaper (U. Amsterdam) report on behalf of a larger collaboration:\n\nWe observed the optical/NIR counterpart  (Starling et al. GCN 13911, \nLevan et al. GCN 13920, Sudilovsky et al. GCN 13926) of GRB 121027A \n(Evans et al. GCN 13906) with the VLT/X-shooter spectrograph, \nbeginning at Oct 30 2012 04:52 UT, which is 2.89 days after the GRB.\n\nWe identify emission lines of [OIII]4959 and [OIII]5007, and several absorption\nlines of CIV, AlII, AlIII, MgI, MgII and FeII at a common redshift of z=1.773.  This \nconfirms the provisional redshift given in Tanvir et al. (GCN 13929) for this GRB.\n\nWe note that the afterglow remains remarkably bright at 2.9 days post burst.\nFrom the photometry of the acquisition image, we measure R = 21.15 +- 0.05 \nassuming R = 15.96 for the USNO star 0311-0027010 at RA = 04:14:21.83, \nDec = -58:50:28.8.\n\nWe thank the VLT staff, in particular Linda Schmidtobreick and \nMyriam Rodrigues, for their assistance in obtaining these data, \nand acknowledge J. Elliott for private information about the transient brightness.",
  "circularId": 13930,
  "createdOn": 1351587932000,
  "email": "tom@dark-cosmology.dk",
  "subject": "GRB 121027A: X-shooter redshift confirmation",
  "submitter": "Thomas Kruehler at Dark Cosmology Center  <tom@dark-cosmology.dk>",
  "eventId": "GRB 121027A"
}