Circular No. 7631

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)

SUPERNOVA 2001bs IN UGC 10018

S. Beckman and W. D. Li, University of California at Berkeley, report the discovery by LOTOSS (cf. IAUC 7514) of an apparent supernova in unfiltered images taken with the Katzman Automatic Imaging Telescope (KAIT) on May 22.4 UT (mag about 18.3) and May 23.3 UT (mag about 18.2). The new object is located at R.A. = 15h43m39s.38, Decl. = +67o45'31".3 (equinox 2000.0), which is 0".9 west and 7".7 south of UGC 10018. A KAIT image of the same field taken on May 7.4 UT showed nothing at this position (limiting mag about 19.0).

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Host galaxy info: Vel = 8750 km/s, 1.1' x 1.0', 14.70, (R')SB(s)bc

SN type info: Ia

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