CI UMa : Superoutburst in October

The SU UMa-type dwarf nova CI UMa experienced an outburst at 13.8 mag as reported on July 26 by M. Reszelski. The last superoutburst occurred in 2000 September (vsnet-campaign 1041). This outburst was rapidly faded, which indicates its normal nature (vsnet-campaign-dn 1039). The next outburst was detected by T. Kinnunen on October 29 (vsnet-campaign 1202). The Kyoto team detected superhumps with 0.3 mag amplitude and a period of 0.0630(9) d using their October 30 and 31 data. This observations confirmed the short-period nature of CI UMa (vsnet-campaign-dn 1820). The analysis of the Kyoto Oct. 31 - Nov. 4 data has yielded a shorter superhump period of 0.0628 d. The amplitude of superhumps has decreased during this interval (vsnet-campaign-dn 1846).

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