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IAUC 7509: 2000du; 2000dv; 2000dk; 2000do

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                                                  Circular No. 7509
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)

SUPERNOVA 2000du IN UGC 3920
     Y. Sato and W. D. Li, University of California at Berkeley, on
behalf of the Lick Observatory Supernova Search (cf. IAUC 6627,
7126), report the discovery with the 0.8-m Katzman Automatic
Imaging Telescope (KAIT) of an apparent supernova on unfiltered
images taken on Oct. 14.5 (mag about 17.8) and 16.5 UT (mag about
17.7).  The new object is located at R.A. = 7h35m19s.78, Decl. =
+19o02'43".5 (equinox 2000.0), which is 14".5 east and 1".5 south
of the nucleus of UGC 3920.  A KAIT image of the same field taken
on Apr. 5.1 showed nothing at the position of SN 2000du (limiting
mag about 19.0).

SUPERNOVA 2000dv IN UGC 4671
     Li also reports the discovery of an apparent supernova by M.
Papenkova on unfiltered KAIT images taken on Oct. 17.5 and 18.5 UT,
both showing the new object at mag about 18.0.  SN 2000dv is
located at R.A. = 8h56m43s.40, Decl. = +52o06'13".2 (equinox
2000.0), which is 5".8 east and 6".6 south of the nucleus of UGC
4671.  A KAIT image taken on Apr. 8.2 showed nothing at the
position of SN 2000dv (limiting mag about 19.5).

     K. Krisciunas, University of Washington, reports photometry of
SN 2000dk, derived from images taken with the Manastash Ridge
Observatory 0.76-m reflector near Ellensburg, WA, using Dophot to
obtain raw PSF magnitudes (uncertainties +/- 0.03 mag): Sept. 20.45
UT, V = 15.87, B-V = +0.08, V-R = +0.17, V-I = +0.18.  From imagery
obtained by Krisciunas and R. McMillan with the Apache Point
Observatory 3.5-m reflector (and reduced with aperture photometry
using IRAF), on Oct. 5.26 they find V = 16.02 +/- 0.02, B-V = 0.54
+/- 0.02.

SUPERNOVA 2000do IN NGC 6754
     Unfiltered CCD magnitude estimates by C. Bembrick, Mt. Tarana
Observatory:  Sept. 30.576 UT, 15.0 +/- 0.3; Oct. 1.380, 15.1;
2.475, 15.2; 3.375, 15.2; 4.379, 15.2.

                      (C) Copyright 2000 CBAT
2000 October 18                (7509)            Daniel W. E. Green

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