GCN Circular 8601
Subject
GRB081203A: Swift/UVOT grism redshift
Date
2008-12-03T19:36:15Z (16 years ago)
From
Wayne Landsman at GSFC/SSAI <wayne.b.landsman@nasa.gov>
W. Landsman (NASA/GSFC), M. DePasquale(MSSL), P. Kuin (MSSL), P.
Schady (MSSL), P. Smith (MSSL), and A.Parsons (NASA/GSFC) report
on behalf of the Swift/UVOT team:
The Swift/UVOT obtained a 49s UV grism spectrum of GRB 081203A starting
249 s after the BAT trigger (Parsons et al. GCN.8595). The
spectrum covers the wavelength range from 2000-4900 A. Longward of
2850 A in the
quicklook spectrum there is an approximately flat continuum of
2.5e-14 erg s-1 cm-2 A-1 with a strong absorption at 3850 A. If the
2850 A cutoff is identified with the Lyman edge, and the 3850 A
absorption with Lyman alpha, then the redshift of GRB081203A is
~2.1. Analysis is continuing.