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1RXP J113123+4322.5 superhump period change Dear Colleagues, We have received a new data set from Jpchen Pietz (the new Kyoto and RIKEN data have not been analyzed yet). The most recent data clearly indicates the decrease of the superhump amplitude. The data also supports the suggested period increase. The period derivative is statistically positive, at a rate close to dot(P)/P = 2*10^(-5). These results indicate that 1RXP J113123+4322.5 bears same characteristics with short-period SU UMa-type dwarf novae, such as SW UMa. Further observations are strongly encouraged. Regards, Taichi Kato VSNET Collaboration team
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