Return to Home Page
NSV 09923: refined superhump period Dear Colleagues, We have received new data sets from Berto Monard and a refined data set from Roland Santallo. The data seem to indicate that the object may have started fading more rapidly, but this may be a software artifact and needs to be confirmed. The mean superhump period up to now is 0.08231 d. There is a general tendency of a systematic period decrease at a rate of dot(P)/P = -1.5x10^(-5). The behavior of the superhump period change looks normal for an SU UMa star at this period. There were occasional enhancements of secondary superhump maxima (maxima around superhump phase 0.5-0.6). However, the most recent observations are not well expressed by the single superhump period; there may have been an emergence of new type of variation, although the software artifact is not completely excluded. [This object, recorded at a relatively faint magnitude and probably from additional unknown factor, has frequently illustrated the limitation of commercial photometry software -- we need to be careful when interpreting the observation. I will later review on this matter when there is time.] Regards, Taichi Kato VSNET Collaboration team
Return to the Daisaku
vsnet-adm@kusastro.kyoto-u.ac.jp
