Circular No. 7114

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 1999ac IN NGC 6063

M. Modjaz, J. Y. King, M. Papenkova, A. Friedman, R. A. Johnson, W. D. Li, R. R. Treffers, and A. V. Filippenko, University of California at Berkeley, report their discovery of an apparent supernova in NGC 6063 during the course of the Lick Observatory Supernova Search with the 0.8-m Katzman Automatic Imaging Telescope (KAIT). SN 1999ac was discovered and confirmed on unfiltered observations taken on Feb. 26.5 (mag about 15.2) and 27.5 UT (mag about 15.0). The new object is located at R.A. = 16h07m15s.01, Decl. = +7o58'20".4 (equinox 2000.0), which is about 23".9 east and 29".8 south of the nucleus of NGC 6063. KAIT images of the same field on 1999 Feb. 20.5 (limiting mag about 17.5) and 1998 July 21.2 (limiting mag about 19.0) show nothing at the position of the supernova.

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Host galaxy info: V = 2848 km/s, 1.7'x0.9', Scd:

SN type info: SN Ia-pec

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