Circular No. 8667

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) BMARSDEN@CFA.HARVARD.EDU or DGREEN@CFA.HARVARD.EDU (science) URL http://cfa-www.harvard.edu/iau/cbat.html Phone 617-495-7244/7440/7444 (for emergency use only)

SUPERNOVAE 2006U, 2006V, 2006W, 2006X

Four apparent supernovae have been discovered on CCD exposures:
2006U and 2006W by the Lick Observatory Supernova Search (by N. J.
Ponticello, J. Burket, and W. Li via KAIT images; cf. IAUC 8664),
2006V by Y.-T. Chen, M. Yang, and C.-S. Lin in the course of the
Taiwan Supernova Survey (cf. IAUC 8567), and 2006X independently by
Shoji Suzuki (Ooami-Shirasato, Chiba, Japan, via twelve CCD frames
taken on Feb. 4 with a 0.32-m f/9 telescope + SBIG infrared-cut
filter; communicated via M. Soma, National Astronomical Observatory
of Japan) and by M. Migliardi (Cortina, Italy, via the CROSS
program; cf. IAUC 7373; source of the tabulated data below for
2006X; communicated by A. Dimai).

SN      2006 UT      R.A.  (2000.0)  Decl.    Mag.     Offset
2006U   Feb. 3.44    9 53 45.38  +23 20 35.1  18.8      --
2006V   Feb. 4.67   11 31 30.01  - 2 17 52.2  18.0  32".1 W, 40".4 N
2006W   Feb. 5.54   14 27 26.09  +25 31 09.8  16.6  1".2 E, 17".5 N
2006X   Feb. 7.10   12 22 53.99  +15 48 33.1  15.3  12" W, 48" S

Additional unfiltered KAIT magnitudes of 2006U (which is
superimposed on a faint galaxy):  2005 Dec. 4.45 UT, [19.6; 14.43,
[18.9; 2006 Jan. 5.45, [18.9; Feb. 4.36, 18.8.  Additional
approximate unfiltered magnitudes of 2006V in UGC 6510:  2005 Dec.
21.848, [18.8; 2006 Feb. 6.648, 18.2.  Additional unfiltered KAIT
magnitudes of 2006W in UGC 9265:  2005 July 14.22, [19.0; 2006 Feb.
6.48, 16.7.  Additional approximate CCD magnitudes for 2006X in NGC
4321 (= M100):  Jan. 3, [20 (Suzuki; magnitudes estimated by Soma);
13, [18.5 (CROSS; unfiltered images); Feb. 4.747, 17 (Suzuki).
Dimai adds that 2006X does not appear on Palomar Sky Survey
infrared, red, and blue plates.  Soma provides his rough
measurement of the position end figures for 2006X from Suzuki's
discovery frame:  53s, 48'.5.

Host galaxy info: vel = 4757 km/s, 1.0 x 0.3, 15.36, S?

SN type info: II

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