CY UMa: December superoutburst

P. Schmeer and E. Muyllaert detected an outburst of the SU UMa-type dwarf nova CY UMa on Februrary 25 at 13.0 and 12.9mag, respectively. The previous outburst was detected by H. Maehara on 1999 December 25.758 UT at mv= 12.1 (vsnet-alert 3857) and turned out to be a supermaximum (vsnet-alert 4276, vsnet-alert 4277). The object rapidly faded from the outburst. The other outburst was reported on April 19 (13.2mag by E. Muyllaert) (vsnet-alert 4644, vsnet-alert 4645). The outburst was again normal one. As reported by E. Muyllaert on December 14, CY UMa is in outburst at 12.5mag (vsnet-campaign-dn 311). It turned out to be a superoutburst. J. Pietz reported his 3-hour observation on December 17 shows clear humps with an amplitude of 0.3mag (vsnet-campaign-dn 317).

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