Circular No. 7229

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 1999dg IN UGC 9758

M. Modjaz 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 in UGC 9758 (= MCG +02-39-007). SN 1999dg was discovered on unfiltered images taken on July 23.2 UT (mag about 16.7) and confirmed on images taken on July 24.2 (mag about 16.5). The new object is located at R.A. = 15h11m28s.41, Decl. = +13o29'05".7 (equinox 2000.0), which is 4".8 east and 5".2 north of the nucleus of UGC 9758. A KAIT image of the same field on July 15.2 (limiting mag about 19.0) showed nothing at the position of SN 1999dg.

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Host galaxy info: V = 6535 km/s, 1.2'x1.2', S0

SN type info: SN Ia

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