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THE ASTRONOMER Electronic Circular No 1248       1997 Nov 2 10.00UT
Ed:Guy M Hurst, 16,Westminster Close, Kempshott Rise,  Basingstoke,
Hants, RG22 4PP,England.Telephone/FAX(01256)471074Int:+441256471074
INTERNET: GUY@TAHQ.DEMON.CO.UK             GMH at AST.STAR.RL.AC.UK
WORLD WIDE WEB                    http://www.demon.co.uk/astronomer
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SUPERNOVA 1997do IN UGC 3845
     Y. L. Qiu, Q. Y. Qiao, W. D. Li, and J. Y. Hu, Beijing
Astronomical Observatory (BAO); and A. Esamdin, Urumqi Astronomical
Station, on behalf of the BAO supernova survey, report their
discovery of a supernova found on unfiltered CCD images with the
BAO 0.6-m reflector on Oct. 31 UT.  Measured R magnitudes:  Oct.
31.84, 15.8; Nov. 1.67, 15.6.  The supernova is located at R.A. =
7h26m42s.50, Decl. = +47o05'36".0 (equinox 2000.0), which is 2".6
west and 3".8 south of the center of UGC 3845.  Unfiltered CCD
images of the same field taken on Oct. 25 (limiting mag about 18.5)
show no star at the position of the supernova.  A low-dispersion
spectrum, taken on Nov. 1.80 by Qiu, Esamdin, and K. L. Huang
(Nanjing Normal University) with the 2.16-m telescope at Xinglong
Station, shows this to be a type-Ia supernova before maximum.  The
spectrum displays a strong Si II 615-nm absorption feature.  The
spectrum is similar to that of SN 1990N, one week before maximum.
The recession velocity, derived from the narrow H-alpha emission
line, is 3240 km/s.
IAUC 6766

Martin Mobberley