[vsnet-alert 5533] UV Per superoutburst: rapid fading and superhumps

[Taichi Kato <tkato>]

UV Per superoutburst: rapid fading and superhumps

Dear Colleagues,

   G. Masi has reported the crucial Jan. 6 observation (vsnet-alert 5531).
The data show the object about 1.0 mag fainter than the Jan. 5 Kyoto run.
These data indicate the rapid fading continued at least until Masi's run.
The light modulation seen in Masi's data are quite similar to superhumps
in profile.  This may be another indication of "late superhump", whose
confirmation requires further observation and precise analysis presently
vigorously undertaken by Iwamatsu-san.

   However, such high-amplitude (having a regular profile) late superhumps
are not very frequently met.  This may be an suggestion of ongoing another
event in the accretion disk.  The Kyoto team (guided by Uemura-san) is now
observing UV Per, and will continue monitoring further development of the
system.

Regards,
VSNET Collaboration team

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