[vsnet-alert 12404] HT Cas: further update

Taichi Kato tkato at kusastro.kyoto-u.ac.jp
Fri Nov 19 10:44:49 JST 2010


HT Cas: further update

   We have received further data from Osaka Kyoiku U. team (late stage
of the plateau), Kyoto team (Ohshima-san), Maehara-san and Javier Ruiz.
Even five days after the rapid decline, the late-stage superhumps
(continuation of the stage C superhumps) persist.  The mean period
has been 0.07577(1) d.  The amplitude reached 0.3 mag last night.
The eclipses were apparently shallower (~1.5 mag) with somewhat
structured near the bottom, indicating that substantial light from
the disk contributes to the luminosity.  There was a small rise
during the observation on last night, when eclipses appeared to have
become slightly shallower.


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