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Dear Colleagues, We have received a data set from G. W. Billings on May 27. The data and Kyoto data on May 28 show humps with an amplitude of ~0.4 mag. The amplitude is obviously larger than that of early superhumps. We perform PDM anarysis on the combined data and obtaind a period of 0.0581d, which is 2.6% longer than the orbital period of 0.0566d. The folded light curve by this period shows a single-peaked profile. Finaly, the usual superhumps are growing. A sudden dip were observed during the last outburst of AL Com in 1995. Continuous observations are encouraged. Regards, Ryoko Ishioka VSNET Collaboration team
Return to the Powerful Daisaku Nogami
vsnet-adm@kusastro.kyoto-u.ac.jp
