Circular No. 7583

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 2001U IN NGC 5442

M. Schwartz, Cottage Grove, OR; and W. D. Li, University of California at Berkeley, on behalf of LOTOSS (cf. IAUC 7514), report the discovery of an apparent supernova (mag about 17.7) on an unfiltered image taken with the 0.5-m Tenagra III telescope on Feb. 15.5 UT (confirmed at mag about 17.3 on an earlier KAIT image taken on Feb. 3.5). SN 2001U is located at R.A. = 14h04m42s.94, Decl. = -9 42'29".7 (equinox 2000.0), which is 4".7 west and 18".7 north of the nucleus of NGC 5442. A KAIT image taken on 2000 July 2.3 showed nothing at this position (limiting mag about 19.0).

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Host galaxy info: V = 8517 km/s, 1.2'x0.5', 14.5, SB(s)b pec?

SN type info: Ia

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