Circular No. 6978

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 1998dh IN NGC 7541

W. D. Li, M. Modjaz, E. Halderson, T. Shefler, J. Y. King, R. R. Treffers, and A. V. Filippenko, University of California at Berkeley, report their discovery of an apparent supernova during the course of the Lick Observatory Supernova Search (cf. IAUC 6627) with the 0.8-m Katzman Automatic Imaging Telescope (KAIT). SN 1998dh was found and confirmed in unfiltered CCD images obtained on July 20.5 (mag about 16.8) and 24.5 UT (mag about 15.3). The new object is located at R.A. = 23h14m40s.31, Decl. = +4 32'14".1 (equinox 2000.0), which is about 53".5 west and 10".4 north of the nucleus of NGC 7541. A KAIT image obtained on July 16.5 did not show a star at the position of SN 1998dh (limiting mag about 19.0).

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Host galaxy info: V = 2678 km/s, 3.5'x1.2', SB(rs)bc: pec

SN type info: SN Ia

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