Electronic Telegram No. 357
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://cfa-www.harvard.edu/iau/cbat.html


SUPERNOVA 2005nb IN UGC 7230
     Further to IAUC 8622, R. Quimby, P. Mondol, and F. Castro, University of
Texas, report the discovery of a supernova in unfiltered CCD images taken
on 2005 Dec. 17.38, 2006 Jan. 3.34, and 7.35 UT (each showing the new object
at mag about 17.2) using the 0.45-m ROTSE-IIIb telescope at the McDonald
Observatory.  SN 2005nb is located at R.A. = 12h13m37s.61, Decl. =
+16o07'16".2 (equinox 2000.0; uncertainty +/- 0".9), which is 1".5 west and
5" north from the center of UGC 7230 (the brighter galaxy in the pair).  The
supernova was found by subtracting a co-addition of images taken between 2005
Jan. 7 and Apr. 12 (limiting mag about 18.8).  A spectrum (range 420-890 nm)
of 2005nb, obtained on Jan. 8.39 UT with the 9.2-m Hobby-Eberly Telescope (+
Marcario Low-Resolution Spectrograph) by B. Roman and S. Rostopchin, shows it
to be a type-Ic supernova.  The spectrum is similar to that of SN 2002ap at
10 days after maximum (Gal-Yam et al. 2002, via the SUSPECT archive at
http://bruford.nhn.ou.edu/~suspect/index1.html).


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2006 CBAT
2006 January 8                   (CBET 357)               Daniel W. E. Green