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 ------------------------------------------------------------------ RGVAD Further to the note on E400, RGVAD is no longer contactable. Until I make fresh arrangements concerning STARLINK, please send all messages to my Sussex box as detailed in the header. 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