{
  "bibcode": "2006GCN..5217....1B",
  "body": "GRB 060512: Keck Redshift\n\nJ. S. Bloom, R. J. Foley, D. Koceveki, D. Perley (UC Berkeley) report:\n\n\"On 31 May 2006 UT, we observed a source consistent with the position  \nof the X-ray and optical afterglow of GRB 060512 (Cummings et al. GCN  \n5117; Mundell et al. GCN 5119) with the Keck I (+LRIS) telescope. In  \na single 1200 sec spectrum we detect emission features at 5380, 7014,  \n7155, and 7224 Ang which we identify as [O II] 3727, H beta, and [O  \nIII] 4959, 5007 at a redshift of z = 0.4428. The [O II] feature is  \nresolved as a doublet. This source is therefore is likely the host  \n(cf. Cenko et al. GCN 5156). This redshift confirms the hypothesis by  \nPiranomonte et al. (GCN 5145), that z_GRB < 2.3, would apparently  \nrefute the claim that at z_GRB ~ 2.7 - 2.9 (Starling et al. GCN  \n5131).  Analysis of other imaging and spectra is on going. Given the  \nrelatively low redshift and the current time since the burst,  \nobservations are encouraged to search for any associated supernova  \nwhich would currently be near peak brightness.\"\n\nThis message may be cited.",
  "circularId": 5217,
  "createdOn": 1149506668000,
  "email": "jbloom@astron.berkeley.edu",
  "subject": "GRB 060512: Keck Redshift",
  "submitter": "Josh Bloom at UC Berkeley  <jbloom@astron.berkeley.edu>",
  "eventId": "GRB 060512"
}