Circular No. 7205

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 1999co IN ANONYMOUS GALAXY

J. Y. King and W. D. Li, University of California at Berkeley, on behalf of the Lick Observatory Supernova Search (cf. IAUC 6627, 7126), report their discovery of two apparent supernovae on unfiltered CCD images taken with the 0.8-m Katzman Automatic Imaging Telescope (KAIT). SN 1999co was discovered on frames taken on June 18.43 and 18.47 UT (mag about 17.4) and confirmed on an earlier image taken on June 13.5 (mag about 17.8); an image of the field taken on June 7.5 under poor seeing conditions already showed a hint of the supernova, which is on the northeast shoulder of the faint host galaxy at R.A. = 21h03m19s.12, Decl. = -14o32'49".0 (equinox 2000.0). KAIT images of the same field taken on May 29.5 (limiting mag about 18.0) and 19.6 (limiting mag about 19.0) show nothing at the position of SN 1999co. SN 1999cp was found on CCD frames taken on June 18.2 and 18.3 UT (mag about 18.2), and confirmed on images taken on June 19.2 (mag about 17.2); it is located at R.A. = 14h06m31s.3, Decl. = -5o26'49" (equinox 2000.0), which is about 52" west and 23" north of the nucleus of NGC 5468. KAIT images of the same field taken on June 13.2 (limiting mag about 19.0) and May 14.3 (limiting mag about 19.5) show nothing at the position of SN 1999cp.

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Host galaxy info: V = 9260 km/s

SN type info: SN II

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