SN 2002ci

Circular No. 7881

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 2002ci IN UGC 10301

P. Martin and W. D. Li, University of California at Berkeley (UCB), report the LOTOSS (cf. IAUC 7514) discovery of an apparent supernova on unfiltered CCD images taken with the 0.8-m Katzman Automatic Imaging Telescope (KAIT) on Apr. 19.5 (mag about 17.2) and 20.4 UT (mag about 17.1). SN 2002ci is located at R.A. = 16h15m37s.95, Decl. = +31o19'17".4 (equinox 2000.0), which is 2".0 east and 0".1 north of the nucleus of UGC 10301. A KAIT image taken on Apr. 4.5 showed nothing at this position (limiting mag about 19.0). R. Chornock, W. D. Li, and A. V. Filippenko, UCB, report that inspection of CCD spectra (range 330-1000 nm) obtained on Apr. 20 with the Shane 3-m reflector at Lick Observatory reveals that the object is a supernova of type Ia. The spectral-feature age (cf. IAUC 7774) is -1 +/- 2 days relative to maximum light. Strong Na I D absorption at the redshift of the host galaxy (0.4-nm equivalent width) implies that this object may be somewhat reddened.

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Host galaxy info: Vel = 6663 km/s, 1.3 x 0.1, 15.80, SBb:

SN type info: Ia

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