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1RXP J113123+4322.5 refined superhump period Dear Colleagues, We have further received new long set of data from Jochen Pitez. An analysis of the combined data sets yielded a refined superhump period of 0.06499(1) d. Compared with the earlier results, the new result seems to suggest an increase in the superhump period, although definite conclusion should await further observations. Many of SU UMa-type dwarf novae are known to show a decrease in the superhump period during their superoutburst plateau. In some short-period system (systems with short superhump periods), such as SW UMa, V1028 Cyg, WX Cet, AL Com, EG Cnc etc. are known to show period decrease. Since the superhump period of 1RXP J113123+4322.5 is comparably short, we can expect a further period decrease. Such systems are also known to frequently show post-superoutburst rebrightening(s). Detailed observation during and after the current superoutburst is thus very desired. The Kyoto team, Torii-san (RIKEN) have been following the object as the top priority target in the evening sky (DM Dra in the morning). Please join us to reveal the superhump evolution of this object. Regards, Taichi Kato VSNET Collaboration team
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