Circular No. 7141

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 1999br IN NGC 4900

J. Y. King, University of California at Berkeley, reports the discovery of an apparent supernova during the course of the Lick Observatory Supernova Search (cf. IAUC 6627, 7126) with the 0.8-m Katzman Automatic Imaging Telescope (KAIT). SN 1999br was discovered and confirmed on unfiltered images taken on Apr. 12.4 and 13.2 UT (both with mag about 17.5). The new object is located at R.A. = 13h00m41s.80, Decl. = +2o29'45".8 (equinox 2000.0), which is about 40" east and 19" south of the nucleus of NGC 4900. A KAIT image of the same field on Jan. 6.6 (limiting mag about 18.5) shows nothing at the position of the supernova. There is a bright foreground star (mag about 11.3) located 12".5 west and 15".6 south of SN 1999br.

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Host galaxy info: V = 969 km/s, 2.2'x2.1', SB(rs)c

SN type info: SN II

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