Circular No. 7271

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 1999ed IN UGC 3555

M. Modjaz and W. D. Li, University of California at Berkeley (UCB), on behalf of the Lick Observatory Supernova Search (cf. IAUC 6627, 7126), report their discovery of an apparent supernova (mag about 17.8) on Oct. 5.5 UT with the 0.8-m Katzman Automatic Imaging Telescope (KAIT). SN 1999ed is located at R.A. = 6h50m00s.95, Decl. = +25o37'54".5 (equinox 2000.0), which is 17".4 east and 9".0 south of the nucleus of UGC 3555. A KAIT image taken on 1998 Nov. 21 showed nothing at the position of SN 1999ed (limiting mag 19.5).

Q. Y. Qiao, Y. L. Qiu, and J. Y. Hu, Beijing Astronomical Observatory (BAO), report the independent discovery of this object during the course of the BAO Supernova Survey. It was found (mag about 18.5) in an unfiltered CCD image taken on Oct. 6.88 UT with the BAO 0.6-m telescope, and confirmed in an image taken on Oct. 7.83. CCD frames taken on Mar. 28.53 (limiting mag about 19.0) showed nothing at the position of the supernova.

A. V. Filippenko and R. T. Chornock, UCB, report that CCD spectra (range 330-1000 nm) obtained on Oct. 8 UT with the Shane 3-m reflector at Lick Observatory reveal that the object is a normal type-II supernova, probably < 2 months after the explosion; there are strong Balmer lines with P-Cyg profiles. The redshift, measured from narrow emission lines in the host galaxy, is 0.016.

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Host galaxy info: V = 4835 km/s, 1.2'x1.1', SAB(rs)bc

SN type info: SN II

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