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TITLE: GCN GRB OBSERVATION REPORT NUMBER: 2013 SUBJECT: GRB 030329, optical spectroscopy DATE: 03/03/30 03:19:19 GMT FROM: Peter Garnavich at U of Notre Dame <pgarnavi@miranda.phys.nd.edu> P. Martini (OCIW), P. Garnavich (Notre Dame) and K.Z. Stanek (CfA) Spectra of the optical afterglow of GRB 030328 (Peterson & Price, GCN 1985; Torii: GCN 1986) were obtained with the Magellan 6.5-m Clay telescope and LDSS2 imaging/spectrograph starting at March 30.06 (UT). The spectra cover the wavelength range of 4000 to 9000 Ang. with a resolution of 13 Ang. FWHM. Preliminary analysis of the spectum of this bright GRB afterglow shows a smooth blue continuum with no significant absorption features. The only obvious feature is an unresolved emission line at 5852 Ang. If this is [OII] emission from the host galaxy, then the redshift is z=0.57. Further analysis is continuing. This message may be cited.
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