{
  "bibcode": "2016GCN.19154....1D",
  "body": "A. de Ugarte Postigo (IAA-CSIC, DARK/NBI), D. Malesani (DARK/NBI),\nT. Kruehler (MPE Garching), D. Xu (NAOC/CAS), S. Schulze (PUC, MAS), \nJ. Hjorth (DARK/NBI), N.R. Tanvir (U. Leicester) report on behalf of a \nlarger collaboration:\n\n\nWe observed the afterglow of GRB 160303A (Beardmore et al., \nGCN 19126; Butler et al., GCN 19131) with ESO���s Very Large Telescope  \nUT2 equipped with X-shooter (Paranal Observatory, Chile). The spectra \ncover the range from 3000 to 18000 AA. Observations consisted of 4x1200s \nexposures, starting at 06:03 UT of 4 March 2016 (18.8 hr after the GRB \nonset).\n\nThe spectrum was obtained when the GRB was at r ~ 24.1 (Klose et al. \nGCN 19142) and hence the S/N is rather low, implying that no absorption \nfeature can be identified. In spite of this, a trace can be seen in the \ncomplete UVB (3000-5600AA) and VIS (5600-10100 AA) spectra. The \ncontinuum is rather blue, as already seen from multiband photometry \n(Butler et al., GCN 19131; Graham et al., GCN 19144). The detection of the \ntrace down to 3000 AA implies a redshift limit of < 2.3 (considering that the \nLyman break is not within the range).\n\nIn spite of the deep spectrum, we have not been able to identify any emission \nfeature, which could be indicative of a very faint galaxy and/or a non star \nforming galaxy (which would be expected for a SGRB).\n\nWe acknowledge excellent support from the Paranal staff.",
  "circularId": 19154,
  "createdOn": 1457230945000,
  "email": "deugarte@iaa.es",
  "subject": "GRB 160303A: X-shooter spectroscopy",
  "submitter": "Antonio de Ugarte Postigo at IAA-CSIC  <deugarte@iaa.es>",
  "eventId": "GRB 160303A"
}