THE ASTRONOMER Electronic Circular No 616 1992 Mar 01 16.14UT Ed:Guy M Hurst, 16,Westminster Close, Kempshott Rise, Basingstoke, Hants, RG22 4PP,England. Telephone/FAX(0256)471074 Int:+44256471074 Telex: 9312111261 Answerback: TA G JANET BOXES: GMH at UK.AC.CAM.ASTRONOMY.STARLINK or GUYH at UK.AC.SUSSEX.CLUSTER TELECOM GOLD: 10074:MIK2885 PRESTEL 256471074 ------------------------------------------------------------------- SUPERNOVA 1992G IN NGC 3294 Further to the announcement on E609, it is evident that this object has brightened. The following further estimates are available: 1992 Feb 21.85UT 12.7 (P.Pujol, Madrid, Spain) Feb 22.90, 12.7 (P.Pujol, Madrid, Spain) 22.957, 13.2 (M.Villi and G.Cortini, Mt.Colombo, Italy) 23.87, 13.7: (H.Dahle, Norway; sequence AAVSO SW UMa) 23.95, 12.8 (J.Ripero, Madrid, Spain) 24.975, 13.2pv(J.Fletcher, Tuffley;reduced by Editor) 25.017, 12.7 (M.Gavin; estimate from CCD Frame) 25.87, 13.6 (H.Dahle, Norway; sequence AAVSO SU UMa) T. Iijima, M. Turatto, and E. Cappellaro, Asiago Observatory, report: "A spectrogram (resolution about 1 nm) of SN 1992G was obtained with the 1.82-m telescope (+ Boller & Chivens spectrograph + CCD) on Feb. 21.04 UT. Preliminary inspection of the spectrum reveals this object to be a type-Ia SN in proximity of maximum. In fact, at about 618 nm is seen the deep absorption usually attributed to Si II (635.5 nm), from which is derived an expansion velocity of 10 000 km/s. Other absorption features are measured at 580, 550, and 532 nm." Y. Kushida, Yatsugatake South Base Observatory, Japan, reports the following improved position for SN 1992G (cf. IAUC 5452), forwarded by H. Kosai, National Astronomical Observatory, Tokyo: R.A. = 10h33m26s.25, Decl. = +37 34'49".9 (equinox 1950.0). On Feb.16.677 UT, mpv = 13.9. IAUC 5458 An e-mail chart follows for use with FINDERS.EXE: \\\\\\SN1992G in NGC 3294 P,10h 33.4m +37 35' (1950) S,120,10,S O,62,63,12.7,? -L,R,SN1992G -S,SN/021.01 -G,58,62,110,30,100 R,7.65,116,97,A,L R,9.31,89,56,B R,10.05,12,50,C R,11.65,115,40,D R,12.65,46,89,E R,13.44,41,27,F R,13.67,97,79,G R,14.25,43,61,H R,14.60,70,6,J R,14.86,47,81,K R,15.47,72,52,L M,14,16,16,22,115,114,14,86,7 M,15,27,15,26,26,102,16,46,3,111,12,41,97 M,15,72,45,43,34,111,85,42,105,100,99 E,27 ////// Basic chart automatically generated by GSC2FIND ver 1.1 Guy M Hurst