[vsnet-alert 12373] HT Cas: superhumps update

Taichi Kato tkato at kusastro.kyoto-u.ac.jp
Mon Nov 8 09:35:27 JST 2010


HT Cas: superhumps update

   We have received further observations from Itoh-san, Kiyota-san,
Crimean Astrophys. Obs. team (Alex Baklanov, Elena Pavlenko),
Gianluca Masi and Javier Ruiz.

   The object continues to show beautiful superhumps and eclipses.
The period of superhump has been relatively constant without minor
disturbances caused by eclipses.  The beat phenomenon has been also
very well observed.

   After the stabilization:

   The mean superhump period: 0.076294(3) d.
   Measured period of the beat phenomenon: 2.136(1) d.
   (expected period from the above Psh and Porb: 2.123 d)

   So, you can see different beat phases interchangeably every night.
Please keep the current excellent coverage!   As Ogmen has written,
a good time resolution is very important (especially in analyzing
eclipses, we usually use 10-15 s resolution).


More information about the vsnet-alert mailing list