{
  "bibcode": "2005GCN..4384....1B",
  "body": "E. Berger (Carnegie Observatories) and A. M. Soderberg (Caltech) report:\n\n\"We obtained 2x1200 sec spectra of the afterglow + host galaxy of the\nshort GRB 051221 (GCN 4383) with Gemini/GMOS.  We detect several strong\nemission lines at the position of the afterglow+host which we identify as\n[OIII]4959,5006, H-beta, and [OII]3727 at a redshift of z=0.5465.  Weak\nabsorption at the CaII H&K and G-band wavelengths at the same redshift may\nalso be present, but at a low significance.\n\nThe detection of strong emission lines indicates that the host galaxy is\nunder-going active star formation, and is possibly similar to that of GRB\n050709 (Fox et al. 2005).\n\nAt the redshift of 0.5465, the isotropic-equivalent gamma-ray energy \nrelease of the burst is 9e50 erg, the highest measured to date.\"",
  "circularId": 4384,
  "createdOn": 1135243986000,
  "email": "eberger@ociw.edu",
  "subject": "GRB 051221: Redshift from Gemini",
  "submitter": "Edo Berger at Carnegie Obs  <eberger@ociw.edu>",
  "eventId": "GRB 051221"
}