OUTBURSTS OF BZ UMA SINCE 1989 The following report gives all my positive observations of the probable SU UMa-type dwarf nova BZ UMa: BZ URSAE MAJORIS (UGSU:) 1990 July 9.94 UT, 12.2:; 11.90 , 12.8: Superoutburst, confirmed by Gary Poyner (cf. IAUC 5051) 1991 Apr. 11.866 UT, (13.7 ; 12.895, 12.0 ; 12.974, 12.0 ; 13.858 UT, 13.9 Normal outburst (detected by several observers) 1991 Oct. 19.17 UT, (13.4 ; 21.072, 12.1 ; 27.1 , (13.2 Normal outburst (confirmed by Taichi Kato at mag 14) 1992 Oct. 20.11 UT, (13.5 ; 26.979, 11.7 Very bright normal outburst (first detected by Gary Poyner) Apparently no further outbursts of BZ UMa have been observed since the end of 1989. Regards, Patrick
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