IAU Central Bureau for Astronomical Telegrams

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IAUC 8657: 2005nb, 2006B, 2006C; C/2005 W14, C/2005 W15

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                                                  Circular No. 8657
Central Bureau for Astronomical Telegrams
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)

SUPERNOVAE 2005nb, 2006B, 2006C
     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 of
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 (similar to the spectrum of SN 2002ap at 10 days
past maximum (Gal-Yam et al. 2002, via the SUSPECT archive at
     Two more apparent supernovae have been found on unfiltered CCD
images:  2006B by T. Puckett and G. Sostero (cf. IAUC 8655; 0.60-m
automated supernova patrol frames); and 2006C by W. Li (LOSS/KAIT;
cf. IAUC 8647).  Additional magnitudes for 2006B in UGC 12538:
2005 Sept. 10, [19.3 (Puckett); 2006 Jan. 8.02, 16.5 (Sostero,
0.45-m reflector near Udine, Italy).  SN 2006B is a type-Ia
supernova (cf. CBET 360).  Additional magnitudes for 2006C:  2004
May 25.31, [19.5; 2006 Jan. 9.53, 17.4.

SN      2006 UT      R.A.  (2000.0)  Decl.    Mag.     Offset
2006B   Jan. 8.02   23 21 09.78  +33 24 01.2  16.7  1".0 W, 2".9 N
2006C   Jan. 6.54   12 02 32.50  +41 02 40.2  17.5  45".3 W, 34".2 S

COMETS C/2005 W14 AND C/2005 W15 (SOHO)
     Additional Kreutz comets have been found on SOHO website
images (cf. IAUC 8654).  C/2005 W14 was small, dim, and stellar in
appearance on C3 images, while on C2 images it appeared slightly
diffuse, reaching mag 7.1 at 6.0 solar radii on Nov. 23.838.
C/2005 W15 was small, faint, and stellar in appearance on C3 images,
and very faint and diffuse on C2 images.

 Comet        2005 UT       R.A.(2000)Decl.   Inst.  F    MPEC
 C/2005 W14   Nov. 23.571  15 53.0   -22 57   C3/2   TS   2005-Y22
 C/2005 W15        25.029  16 01.3   -24 08   C3/2   HS   2005-Y22

                      (C) Copyright 2006 CBAT
2006 January 12                (8657)            Daniel W. E. Green

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