{
  "bibcode": "2016GCN.18982....1P",
  "body": "G. Pugliese (API/UvA), S. Covino (INAF/OAB), T. Kruehler (MPE Garching), D. Xu (NAOC/CAS), \nN. R. Tanvir (Leicester), report on behalf of a larger collaboration:\n\nWe observed the afterglow of GRB 160203A (D'Avanzo et al., GCN 18979;\nKruehler et al., GCN 18980; Xu, GCN 18981) with ESO's Very Large\nTelescope UT2 equipped with X-shooter. Our observations were performed\nin Rapid Response Mode and started at 02:31:35 UT on 03-02-2016, just about \n18 min after the Swift trigger. The X-shooter spectra cover the range between \n3000 and 23000 AA, and were obtained at a seeing of around 0.8\".\n\nA preliminary analysis of the spectrum shows a clear continuum with\nabsorption features due to Lyman-alpha and various metal lines (SII 1254, SiII 1259/60, OI 1302, \nSiII 1304, CII 1334, Si IV 1393/1402, SiII 1526, CIV 1548/1550, FeII 1608, AlII 1670) at a common \nredshift of 3.52, which we propose as the redshift of the GRB. \nWe also detect an intervening system at z=2.203.\n\nWe acknowledge the fast and efficient support provided by Paranal staff. In particular we thank Dimitri \nGadotti, Boris Haeussler, and Marcela Espinoza for their excellent job.",
  "circularId": 18982,
  "createdOn": 1454473349000,
  "email": "pugliese@astroduo.org",
  "subject": "The bright GRB160203A: X-shooter spectroscopy and redshift",
  "submitter": "Giovanna Pugliese at API/UvA  <pugliese@astroduo.org>",
  "eventId": "GRB 160203A"
}