Circular No. 7592

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 2001Y IN NGC 3362

W. D. Li and M. Modjaz, University of California at Berkeley (UCB), on behalf of LOTOSS (cf. IAUC 7514), report the discovery of a supernova (mag about 18.1) on unfiltered images taken on Mar. 3.34 and 3.47 UT with the 0.8-m Katzman Automatic Imaging Telescope (KAIT). SN 2001Y is located at R.A. = 10h44m50s.42, Decl. = +6 35'50".8 (equinox 2000.0), which is 18".0 west and 2".3 north of the nucleus of NGC 3362. SN 2001Y was confirmed at about the same brightness on an unfiltered image taken by M. Schwartz on Mar. 4.2 with the Tenagra Observatory 0.5-m automatic telescope. Images of the same field taken with the Tenagra 0.5-m telescope on Feb. 19.3 (limiting mag about 18.5) and with KAIT on 1999 Apr. 10.3 (limiting mag about 19.5) showed nothing at this position. R. Chornock (UCB), Li, and A. V. Filippenko (UCB) obtained a noisy spectrum of SN 2001Y with the Lick Observatory Shane 3-m telescope on Mar. 3.5 under poor conditions. The spectrum is featureless with a very blue continuum, suggesting that SN 2001Y is a type-II supernova before maximum light.

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Host galaxy info: V = 8290 km/s, 1.4'x1.1', 13.48, SABc Sy2

SN type info: II

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