{
  "submitter": "Shri Kulkarni at Caltech <srk@astro.caltech.edu>",
  "body": "GRB 971214 Optical Observations                                #029\n\nS. R. Kulkarni, K. L. Adelberger, J. S. Bloom, T. Kundic, L. Lubin,\nCalifornia Institute of Technology, report:  \n\"On December 28, 1997, Kundic and Lubin obtained spectra of the optical\ntransient of GRB 971214 (IAUC 6788) with the Low Resolution Imaging\nSpectrograph (LRIS) mounted on the Keck II telescope.  The seeing\nconditions were excellent.  If the transient continued the power-law\ndecay as indicated by the data from Halpern et al. IAUC 6788) then by\nthis epoch the light at this position should be dominated by the host\n(cf. Kulkarni et al. GCN #27; ATEL #5).  Analysis of these spectra show\na slightly extended emission feature at 5384 A.  Additionally, a broad\nabsorption feature is seen at 5752 A.  We cannot at this time make a\ndefinitive statement about the redshift of the host.  If, the emission\nfeature is identified as Lyman-alpha and the absorption feature as OI\n1302 A then the redshift of the (presumed) host is z=3.43. However,\nthere appears to be no obvious depression bluewards of this feature as\nis normally seen in high-redshift objects (caused by the Lyman\nforest).  If, however,  the emission feature is identified with the\n[OII] 3727 line then the redshift is z=0.44.\n\nA strong emission feature at a wavelength of 5602 A is also seen in the\nspectrum of the nearby galaxy G1 (GCN #12; GCN #13).  Identifying this as\nthe [OII] 3727 A feature as well as matching major absorption features\nyields a redshift of z=0.50.\n\nWe are in the process of analyzing additional LRIS data to improve the\nsignal-to-noise ratio and also to understand the apparent discrepancy\nwith similar data obtained on 17 Dec 1997 UT (GCN #12).  We note that\nthe earlier data were obtained under bright lunar conditions while the\ndata reported herein was obtained during dark time.\n\nThis message is citable.\"",
  "format": "text/plain",
  "email": "circulars@gcn.nasa.gov",
  "version": 2,
  "bibcode": "1998GCN....29....1K",
  "createdOn": 884476800000,
  "circularId": 29,
  "editedBy": "Vidushi Sharma at NASA GSFC/UMBC <vidushi.sharma@nasa.gov> on behalf of Tyler Barna at University of Minnesota <tylerpbarna@gmail.com>",
  "subject": "GRB 971214: Redshift from Keck Observations",
  "eventId": "GRB 971214",
  "editedOn": 1720570312438
}