{
  "bibcode": "2013GCN.15407....1X",
  "body": "D. Xu, J. P. U. Fynbo (DARK/NBI), P. Jakobsson, Z. Cano (U. Iceland),\nB. Milvang-Jensen, D. Malesani (DARK/NBI), A. de Ugarte Postigo\n(IAA-CSIC, DARK/NBI) & M. Hayes (Stockholm University) report on\nbehalf of a larger collaboration:\n\nWe observed the optical afterglow of GRB 131030A (Troja et al., GCN\n15402) with the NOT equipped with the AlFOSC instrument. The transient\nis clearly detected in our acquisition image with a magnitude R ~ 17\nat a mean time of 0.569 hr after the GRB.\n\nA single spectrum of 1200 s covering the range from 3800 to 8000 AA\nwas obtained with a mean epoch of 0.894 hr after the burst. The\nspectrum displays a strong continuum with features of Fe II, Mg II and\nAl II at a common redshift of z = 1.293 (wavelength calibration based\non archival data), which we identify as the redshift of the GRB. We\nalso detect an intervening system at z = 1.16 displaying Fe II and Mg\nII.",
  "circularId": 15407,
  "createdOn": 1383173312000,
  "email": "dong.dark@gmail.com",
  "subject": "GRB 131030A: NOT redshift",
  "submitter": "Dong Xu at DARK/NBI  <dong.dark@gmail.com>",
  "eventId": "GRB 131030A"
}