{
  "bibcode": "2000GCN...606....1F",
  "body": "Feng, M., Wang, L., and Wheeler, J. C., University of Texas at Austin report:\n\nWe obtained a low resolution (resolving power about 70) spectrum of \nGRB 000301c with the 2.7 meter telescope at McDonald Observatory on 2000 \nMarch 3.47. The total exposure time was 3900 seconds with wavelength \ncoverage from 318 nm to 589 nm. The low S/N (about 2-4) spectrum can be \nfitted with a power law of spectral index beta = -1.1 witn no obvious\nbreaks after correcting for interstellar extinction assuming R = 3.1, \nE(B-V) = 0.05 (cf GCN 585). The flux level is around 2.5E-17 ergs/cm2/sec/A. \nThis puts any possible Lyman break at wavelengths shorter than 318 nm.  \nThe object is thus at a redshift lower than 2.5. This is consistent with \nthe report by Smette et al. (GCN 603).\n\nThe spectrum may reveal two absorption features at 336.0 nm and \n352.2 nm.  If identified with Lyman alpha, the redshifts of these features \nare 1.76 and 1.89.  The data also show another absorption feature at \n367.1 nm, but with even lower confidence level.  This feature yields \na redshift of 2.02 if identified with Lyman alpha.  Another possible\nfeature is an absorption at 405.8 nm which might be identified with \nC II 133.5 nm at a redshift of 2.04.\n\nThis message may be cited.",
  "circularId": 606,
  "createdOn": 952696334000,
  "email": "lifan@astro.as.utexas.edu",
  "subject": "GRB 000301C: Optical Spectrum and Redshift",
  "submitter": "LIfan Wang at U.Texas  <lifan@astro.as.utexas.edu>",
  "eventId": "GRB 000301C"
}