[IAUC] CBET 1335: 20080414 : SUPERNOVAE 2008bk AND 2008br

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                                                  Electronic Telegram No. 1335
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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SUPERNOVAE 2008bk AND 2008br
     N. Morrell and M. Stritzinger, on behalf of the Carnegie Supernova
Project, report that they obtained spectra (range 380-924 nm) of 2008bk (cf.
CBET 1315) and 2008br (cf. CBET 1332) with the Las Campanas Observatory DuPont
telescope (+ WFCCD) on Apr. 12.4 and 12.1 UT, respectively.  Both events are
type-II supernovae and a few weeks past explosion.  Adopting a host-galaxy
recession velocity of 227 km/s for NGC 7793 and 3019 km/s for IC 2522
(Koribalski et al. 2004, A.J. 128, 16), Morrell and Stritzinger measure, from
the minimum of the H-beta absorptions, expansion velocities of 4100 km/s for
2008bk and 5000 km/s for 2008br.  Comparison with a library of supernova
spectra (SUPERFIT spectra-comparison tool; Howell et al. 2005, Ap.J. 634,
1190) yields a good match to SN 1999em at 36 days after explosion for 2008bk,
and to 1993W at 20 days after explosion for 2008br.


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                         (C) Copyright 2008 CBAT
2008 April 14                    (CBET 1335)              Daniel W. E. Green