{
  "bibcode": "2008GCN..7587....1T",
  "body": "Christina C. Thoene (DARK/NBI), Annalisa De Cia (Univ. Iceland), Daniele \nMalesani, and Paul M. Vreeswijk (DARK/NBI), report:\n\nWe observed the optical afterglow of GRB 080411 (Marshall et al., GCN \n7584; Kruehler et al., GCN 7586) wih the ESO VLT equipped with FORS1 \nwith grism 300V. In a 600 s exposure taken at large airmass (average of \n2.45) the afterglow trace is clearly detected. The mean time of the \nobservations is Apr 11.987 UT (2.4 hr after the trigger). In the \nacquisition image, we measure R = 17.25 based on archival zeropoints.\n\nWe detect very strong absorption lines from Mg II, Mg I, Fe II and \nseveral other ions at a redshift z = 1.03. Given the strength of the \nfeatures, we consider this to be the redshift of the GRB. We caution \nthat the wavelength calibration is based on archival data.\n\nWe acknowledge excellent support from the ESO staff, who carried out \nthis difficult observation, in particular Swetlana Hubrig.",
  "circularId": 7587,
  "createdOn": 1207965061000,
  "email": "malesani@astro.ku.dk",
  "subject": "GRB 080411: VLT redshift",
  "submitter": "Daniele Malesani at Niels Bohr Inst,Dark Cosmology Center  <malesani@astro.ku.dk>",
  "eventId": "GRB 080411"
}