[vsnet-campaign 1145] WZ Sge: fourth rebrightening

[Taichi Kato <tkato>]

WZ Sge: fourth rebrightening

Dear Colleagues,

    We have received new data from T. Vanmunster, J. Pietz, D. Boyd (two
nights) and M. Richmond, S. Davis, M. Aggeleton (RIT team), and are
intensively analyzing the Kyoto Aug. 28 observation (observed by
Ishioka-san).

    A quick look at the data have shown that the system has undergone
its fourth rebrightening, slowly starting near the end of Vanmunster's
run, major rise during the RIT observation, and peaking at the beginning
at the Kyoto Aug. 28 run.  The peak brighteness may even surpass those
of the three preceding ones (pending more accurate zero point adjustment).
The object has already stared a slow fading, as reported by J. Pietz.

    The complex hump features are observed to grow during the Vanunster's
run, stronger in RIT runs.  The profile has become a "triple wave" at the
time of the Kyoto observation, and its pattern persists in the latest
Pietz's run.  The system may fade rapidly again, but the recurrence time
is peogressively getting shorter.  One may witness the next rise at
any time!

    We will be undertaking on the phasing/period analysis, as well as
further analysis of the Kyoto data.  More information will be posted later.

Regards,
Taichi Kato
VSNET Collaboration team

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