[vsnet-alert 5754] (fwd) CP Dra beat phenomenon?

[Taichi Kato <tkato>]

(fwd) CP Dra beat phenomenon?

   The following two notes have been released by the VSNET Collaboration
team.  The CP Dra observing campaign is excitingly in progress!
(Please don't forget TV Crv and other interesting objects, however...)

Date: Thu, 01 Mar 2001 00:11:53 +0900
From: Makoto Uemura <uemura@kusastro.kyoto-u.ac.jp>
Subject: [vsnet-campaign-dn 555] CP Dra

    D. Buczynski has kindly sent us his data taken on February 24/25.  
The data includes two superhumps with an amplitude of ~0.3mag.  

    The Kyoto team also performed time-series photometry on February 27.  
The data shows a clear hump with 0.35mag amplitude.  
The object has begun declining with a rate of ~0.12 mag/day.  
It is interesting that we can see 0.2mag brightening between 
February 24 and 25 in the Kyoto observations.  
In conjunction with changing decline rate since February 25, 
this may be because of the beat phenomenon or because the supermaximum 
lies around February 25.0 (UT).  Follow-up observations during this 
superoutburst will reveal the current status.

    Using the 1809 photometric points which the VSNET collaboration team 
obtains, we performed the PDM period analysis and obtained the 
best candidate of the period of 0.08491 +/- 0.00009 day. 
     
Regards,
Makoto Uemura

Date: Thu, 01 Mar 2001 00:41:25 +0900
From: Makoto Uemura <uemura@kusastro.kyoto-u.ac.jp>
Subject: [vsnet-campaign-dn 556] CP Dra

    Just now, R. Novak has kindly sent the last night obervation 
to the VSNET collaboration team. 
Preliminary analysis yields the revised superhump period to be 
0.08474 +/- 0.00008 day. 

Thank you for collaboration.

Regards,
VNSET Collaboration team

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