{
  "bibcode": "2011GCN.11708....1M",
  "body": "P. A. Milne (U. Arizona) and S. B. Cenko (UC Berkeley) report on behalf of\na larger collaboration:\n\nWe have obtained a series of optical spectra of the afterglow of GRB\n110213A (D'Elia et al, GCN 11705) with the Boller and Chivens Spectrograph\nmounted on the 2.3-m Bok telescope.  Observations began at 05:53 UT (~ 36\nminutes after the Swift trigger time) and cover the wavelength range from\n~ 4000-8300 A.\n\nWe detect a series of strong, narrow absorption features corresponding to\nMg II and Fe II at a common redshift of z = 1.46.  Without the detection\nof fine structure lines or a DLA system, we cannot definitively identify\nthis as the redshift of the GRB host galaxy.  However, the lack of\ndetection of Lyman alpha absorption down to ~ 4000 A limits the redshift\nof the host galaxy to z <~ 2.3.",
  "circularId": 11708,
  "createdOn": 1297581799000,
  "email": "cenko@srl.caltech.edu",
  "subject": "GRB 110213A: Bok Telescope Redshift",
  "submitter": "S. Bradley Cenko at Caltech  <cenko@srl.caltech.edu>",
  "eventId": "GRB 110213A"
}