THE ASTRONOMER Electronic Circular No 401      1990 Apr 12 20.50UT
Microlink:MAG60138              JANET:GUYH at UK.AC.SUSSEX.CLUSTER
Ed:Guy M Hurst, 16,Westminster Close, Kempshott Rise, Basingstoke,
Hants, RG22 4PP, England. Telephone: (0256)471074 Int:+44256471074
Telex: 94082518 Answerback: TAGUY
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RGVAD
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SUPERNOVA 1990H IN NGC 3294
S. Perlmutter, C. Pennypacker, H. Marvin, T. Sasseen, C. Smith,
and R. Muller, University of California at Berkeley, report:
"Images obtained on Apr. 9.4 UT in the course of the Berkeley
Automated Supernova Search reveal a probable supernova in NGC 3294
(R.A. = 10h33m24s, Decl. = +37 35'.1, equinox 1950.0).  The super-
nova is located 12" west and 1" south of the galaxy's nucleus, and
was at mag 16 on Apr. 9; it was subsequently found to be present
(fainter than our threshold for automatic detection:  mag about
16.5 to 17, depending on the seeing) in prior images obtained on
Jan. 24 and 29, Feb. 14, 15, 22, 23, and 26, Mar. 5, 19, 26, 27,
28, and 30, and Apr. 2.  A good image obtained on 1989 Nov. 10
shows no object present to a limiting magnitude of 18 (95-percent
confidence level).  Images were also taken on 1989 Dec. 6 and 23
and on 1990 Jan. 19 that show no evidence for the supernova, but
they were poor in quality.  Additional analysis on these images is
underway.  The long, slow rise in the luminosity is reminiscent of
SN 1987A."
IAUC 4992
 
Guy M Hurst