WY Tri: New member of SU UMa-type dwarf nova

T. Vanmunster performed time-series photometry on December 20/21 at CBA Belgium Observatory, and reported that the light curve clearly shows the presence of a 0.38 mag modulation, to be attributed to superhumps. The superhump period is calculated to be 0.0786 d, and he thus concluded WY Tri is a new member of SU UMa-type dwarf novae (vsnet-campaign 588, vsnet-campaign-dn 326). J. Pietz performed 3h45m run on December 20 (vsnet-campaign 595). The Kyoto team (R. Ishioka et al.) also calculated a superhump period of 0.0784 d with a 4.1-hour observation on December 22 (vsnet-campaign 601). T. Kato reported a light curve presented by R. Novak (at Brno) also clearly shows superhumps (vsnet-campaign 605). Based on Kyoto data and Brno data the superhump period was calculated to be 0.07889 d (vsnet-campaign 608). The Kyoto team obtained another series of WY Tri on December 24. The best superhump period from all observations (Kyoto data and Brno data) is 0.07863 d, which is slightly shorter than the previous result. T. Kato commented this may have been a result of shortening of the superhump period (vsnet-campaign 616). M. Uemura and T. Kato reported it entered a rapid fading phase on December 27 (vsnet-campaign 368).

Light Curve and General Information of This Object