{
  "bibcode": "2013GCN.14757....1X",
  "body": "D. Xu (DARK/NBI), A. de Ugarte Postigo (IAA-CSIC, DARK/NBI), D.\nMalesani (DARK/NBI), S. Schulze (PUC and MCSS), J. P. U. Fynbo, D. J.\nWatson (DARK/NBI), V. D'Elia (ASI-SDC, INAF OAR), P. Goldoni (APC,\nCEA/Irfu), M. Vestergaard (DARK/NBI) report on behalf of the X-shooter\nGRB GTO collaboration:\n\nWe observed the optical afterglow of the short-duration GRB 130603B\n(Melandri et al., GCN 14735; Levan et al., GCN 14742; de Ugarte\nPostigo et al., GCN 14743) using the ESO VLT equipped with the\nX-shooter spectrograph. The observations started on 2013-06-04 at\n00:00:28 UT (i.e., 8.187 hr after the burst). A total exposure of\n4x600 s was obtained, covering the spectral range from ~300 to ~2100\nnm.\n\nA continuum is detected in all the UVB/VIS/NIR arms of the spectra. We\nidentify several absorption features which we interpret as Ca II H & K\nand Mg II from the optical afterglow, as well as emission lines such\nas the [O II] doublet, [O III], H-alpha, H-beta, and [S II] from the\nhost galaxy, all at a common redshift of z=0.3564+/-0.0002, fully\nconsistent with the measurements by Thoene et al. (GCN 14744), Foley\net al. (GCN 14745), and Sanchez-Ramirez et al. (GCN 14747).\n\nWe thank the Paranal staff for enthusiastic support, in particular\nCedric Ledoux and Alex Correa.",
  "circularId": 14757,
  "createdOn": 1370342317000,
  "email": "dong.dark@gmail.com",
  "subject": "GRB 130603B: VLT/X-shooter redshift confirmation",
  "submitter": "Dong Xu at DARK/NBI  <dong.dark@gmail.com>",
  "eventId": "GRB 130603B"
}