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[vsnet-campaign-dn 3440] BC UMa late superhumps



BC UMa late superhumps

Dear Colleagues,

   We have received new data from Jochen Pietz (two nights), Ouda Station
(Uemura-san, two nights) during the rapid decline stage.  The Kyoto team
(Ishioka-san) and Torii-san (RIKEN) also covered the decline phase, which
will be incorporated in later analyses.

   A preliminary analysis of the Feb. 13-14 data has revealed the presence
of humps.  There was a main hump with an amplitude of 0.3 mag and a smaller
hump at phase 0.5, suggesting that the profile is a combination of superhumps
and late superhumps.

   The profile of the superhumps during the rapid decline stage is posted
at:

   http://vsnet.kusastro.kyoto-u.ac.jp/pub/vsnet/DNe/BC_UMa/bclate.gif

   The object is expected to rebrighten, as in the 2000 superoutburst.
Please keep your close watch!

Regards,
Taichi Kato
VSNET Collaboration team


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