IAU Central Bureau for Astronomical Telegrams

Central Bureau for Astronomical Telegrams -- Image credits

IAUC 8661: 2006H, 2006I, 2006J, 2006K, 2006L, 2006M, 2006N

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 8660  SEARCH Read IAUC 8662

View IAUC 8661 in .dvi, .ps or .PDF format.
IAUC number


                                                  Circular No. 8661
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 2006H, 2006I, 2006J, 2006K, 2006L, 2006M, 2006N
     Six apparent supernovae have been found on unfiltered CCD
images:  2006I by T. Puckett and T. Crowley (cf. IAUC 8660), 2006J
by N. J. Ponticello and W. Li (LOSS/KAIT; cf. IAUC 8660), 2006N by
M. Armstrong (cf. IAUC 8643), and the rest by the "Nearby Supernova
Factory" (NSF) collaboration (via NEAT images, Palomar 1.2-m
telescope; cf. CBET 374).

SN      2006 UT      R.A.  (2000.0)  Decl.    Mag.     Offset
2006I   Jan. 19.42  10 59 30.03  +75 11 34.0  18.1  5".1 W, 4".9 N
2006J   Jan. 20.09   0 20 20.15  + 7 42 07.0  18.3  0".5 E, 4".7 N
2006K   Jan. 17.5   11 29 46.26  -17 25 17.8  18.6     --
2006L   Jan. 17.6   13 07 11.76  +28 38 46.2  19.9     --
2006M   Jan. 17.6   13 27 19.76  +31 47 14.5  18.5     --
2006N   Jan. 21.02   6 08 31.24  +64 43 25.1  15.0  0".4 E, 0".1 N

Additional magnitudes of 2006I in NGC 3465:  Jan. 8.46 UT, [19.2;
20.42, 18.0.  SN 2004bc also appeared in NGC 3465 (IAUC 8315).
Additional KAIT magnitudes of 2006J in IC 13:  2005 Oct. 29.15,
[19.5; Dec. 17.17, [18.5; 2006 Jan. 21.09, 18.3.  Additional
magnitudes of 2006N in MCG +11-8-12:  2004 Aug. 26, [19.5; 21.738,
15.0.  Nothing was visible at the location of 2006N on Palomar Sky
Survey images from 1996 (limiting red mag 20.8) and 1993 (limiting
blue mag 22.5).
     NSF spectroscopy (range 320-1000 nm, University of Hawaii
2.2-m telescope; cf. CBET 374) of 2006M in PGC 47137 and 2006L show
them to be type-IIn supernovae, while 2006K is a type-II supernova.
NSF spectroscopy of 2006H (IAUC 8660), obtained on Jan. 20.3 UT,
shows it to be a type-Ia supernova; its spectrum was similar to the
peculiar, subluminous SN 1991bg (Filippenko et al. 1992, A.J. 104,
1543) at two days past maximum light (cf. CBET 371).
     S. Blondin, M. Modjaz, R. Kirshner, and P. Challis, Harvard-
Smithsonian Center for Astrophysics, report that a spectrum (range
350-740 nm) of SN 2006N, obtained on Jan. 22.23 UT by P. Berlind
with the F. L. Whipple Observatory 1.5-m telescope (+ FAST), shows
it to be a type-Ia supernova, with a spectral-feature age (Riess et
al. 1997, A.J. 114, 722) of -3 days from maximum light.  Adopting a
recession velocity of 4280 km/s for the host galaxy (Falco et al.
1999, PASP 111, 438), the maximum absorption in the Si II line
(rest 635.5 nm) is blueshifted by 12000 km/s.

                      (C) Copyright 2006 CBAT
2006 January 22                (8661)            Daniel W. E. Green

Read IAUC 8660  SEARCH Read IAUC 8662

View IAUC 8661 in .dvi, .ps or .PDF format.


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


Valid HTML 4.01!