[IAUC] CBET 1353: 20080423 : SUPERNOVAE 2008by AND 2008bz

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                                                  Electronic Telegram No. 1353
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 2008by AND 2008bz
     F. Yuan, University of Michigan; R. Quimby, California Institute of
Technology; D. Chamarro, M. D. Sisson, and C. Akerlof, University of Michigan;
and J. C. Wheeler, University of Texas, on behalf of the ROTSE collaboration,
report the discovery of a supernova (mag about 17.7) in unfiltered CCD images
taken on Apr. 22.14 UT with the 0.45-m ROTSE-IIIb telescope at McDonald
Observatory.  The new object, designated 2008bz, is located at R.A. =
12h38m57s.74, Decl. = +11o07'46".2 (equinox 2000.0; uncertainty < 1"), which
is 5".7 west and 3".8 south of the center the apparent host galaxy (2MASX
J12385810+1107502).  A finding chart for 2008bz is posted at website URL
http:/www.rotse.net/rsvp/j123857.7+110746/j123857.7+110746.jpg.  A spectrum
(range 420-890 nm) of 2008bz, obtained on Apr. 23.13 with the 9.2-m Hobby-
Eberly Telescope (+ Marcario Low-Resolution Spectrograph) by S. Rostopchin
and F. Deglman, shows it to be a type-Ia supernova.  The spectra are similar
to those of SN 1992A around maximum light (Kirshner et al. 1993, Ap.J. 415,
589).  Correcting for the Sloan Digital Sky Survey redshift of the host
galaxy (z = 0.06), the minimum of the Si II 635.5-nm feature is blushifted
by 11300 km/s.

     CORRIGENDUM.  On CBET 1350, SN 2008by, line 14, FOR  about five days
after explosion  READ  about five days after maximum light


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                         (C) Copyright 2008 CBAT
2008 April 23                    (CBET 1353)              Daniel W. E. Green