{
  "bibcode": "2013GCN.15571....1G",
  "body": "P. Goldoni (APC/Irfu - CEA), A. de Ugarte Postigo (IAA - CSIC and DARK/NBI) and J.P.U. Fynbo (DARK/NBI) report on behalf of the X-shooter GRB collaboration :\n\n\n We reduced with the most recent pipeline the observations of the optical afterglow of GRB 090530 (Cannizzo et al., GCN 9438) made using the ESO VLT equipped with the X-shooter spectrograph. The observations were performed during commissioning with the instrument not fully calibrated. The observations started on 2009-05-30 at 23:56 UT (i.e., 20.63 hr after the burst). A total exposure of 1x900 s + 4x1200 s was obtained, covering the spectral range from ~3000 to ~24000 Ang. \nThe afterglow is detected in the UVB and VIS arms with a faint continuum. Superposed on the continuum we detected spectral features consistent with MgII, MgI, SiII, FeII and AlIII at a redshift ~1.266 fully consistent with the photometric redshift 1.28 (+0.16, -0.15) (Kruehler et al. 2011, A&A 526, 153).",
  "circularId": 15571,
  "createdOn": 1386095488000,
  "email": "goldoni@apc.univ-paris7.fr",
  "subject": "GRB 090530: X-shooter redshift",
  "submitter": "Paolo Goldoni at U.Paris/APC  <goldoni@apc.univ-paris7.fr>",
  "eventId": "GRB 090530"
}