IAU Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

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

The following International Astronomical Union Circular may be linked-to from your own Web pages, but must not otherwise be redistributed (see these notes on the conditions under which circulars are made available on our WWW site).


Read IAUC 8656  SEARCH Read IAUC 8658

View IAUC 8657 in .dvi, .ps or .PDF format.
IAUC number


                                                  Circular No. 8657
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 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  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
http://bruford.nhn.ou.edu/~suspect/index1.html).
     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

Read IAUC 8656  SEARCH Read IAUC 8658

View IAUC 8657 in .dvi, .ps or .PDF format.


Our Web policy. Index to the CBAT/MPC/ICQ pages.


Valid HTML 4.01!