Circular No. 7514

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 2000dx IN UGC 1775

M. Schwartz, Cottage Grove, OR; and W. D. Li, A. V. Filippenko, M. Modjaz, and R. R. Treffers, University of California at Berkeley, report the discovery of a supernova during a collaboration of the Lick Observatory Supernova Search (cf. IAUC 6627, 7126) using the 0.8-m Katzman Automatic Imaging Telescope (KAIT) and the Tenagra Observatory Supernova Search using the 0.8-m Tenagra II and 0.5-m Tenagra III automated telescopes (hereafter the Lick Observatory and Tenagra Observatory Supernova Searches, or LOTOSS). SN 2000dx was discovered and confirmed with the 0.5-m Tenagra III telescope on unfiltered images taken on Oct. 30.3 (mag about 17.3) and 31.2 UT (mag about 17.1). The new object was also confirmed on an unfiltered KAIT image taken on Oct. 31.3 (mag about 17.1). SN 2000dx is located at R.A. = 2h18m26s.88, Decl. = +5o39'02".0 (equinox 2000.0), which is 7".9 east and 12".3 south of the nucleus of UGC 1775. A KAIT image taken on Oct. 22.3 showed nothing at the position of SN 2000dx (limiting magnitude about 18.5). Filippenko and Li add that inspection of CCD spectra (range 330-1000 nm) obtained on Nov. 1 with the Shane 3-m reflector at Lick Observatory reveals that SN 2000dx is of type Ia, probably a few days before maximum brightness.

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Host galaxy info: V = 9108 km/s; 1.5' x 1.5'; 13.80; S?

SN type info: Ia

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