[vsnet-alert 428] S10932 in low state

[Peter.Kroll@STW.TU-Ilmenau.DE (Peter Kroll)]

S10932 Com in low state

In watching for a new outburst of S 10932 Com I checked this star last
night (96-Jun-04/05) and found it 1.5 mag fainter than its normal
state for about 3 hours. The star appears to undergo one of its (rare
?) low states (G.A. Richter et al., Astron. Astrophys., in prep.). 

Due to disturbing moon light I was'nt able to detect any eclipsing
minimum. It is, however, extremely important to monitor this event in
order to see whether the accretion disk is present or not. This should
be checked by the shape of the eclipsing light curve. Examining some
30 minima of S 10932 recorded during January, February and March this
year I sometimes found the typical shape of CV-eclipses exhibiting the
different contacts (accretion disks, WD, bright spot). However, this
could'nt be observed at every minimum. I must add that, due to its faint
light, S 10932 is difficult to observe in high time resolution. The
duration of the minimum takes about 10 minutes. 

I would like to those urge colleagues, who have sufficient telescope
power, to look at this star in the following nights. It is currently
around 19th mag and the minimum can reach 20. A finding chart can be
found at
	http://ftp.kusastro.kyoto-u.ac.jp/pub/vsnet/DNe/S10932 .  
The latest elements of the eclipses are
	Min = HJD 24 49 486.48166 + 0.0870386727d * E .

Peter Kroll

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| Dr. Peter Kroll      |                      |                         |
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