[Aavso-photometry] [AAVSO-DIS] TT ARI

[arne]

Martin Nicholson wrote:
> Is there anybody working on TT ARI?
>    
>   I have been doing three colour photometry and the lightcurve I get has curious features: not least when it flips between R brighter than B brighter than G to R brighter than G brighter than B in a few minutes - and then back again.
>    
>   http://tinyurl.com/yv7v6z 
> 
Working on any cataclysmic variable, and trying to interpret features
at different wavelengths, especially when the observations are not
simultaneous, is very difficult.  Your variations are not much larger
than your error bars.  Remember that these stars "flicker", and so may
change by several hundredths to tenths of magnitudes on very short time
scales, so accurate colors are very difficult to determine.  In addition,
working on a 10th magnitude star with a small telescope can have
significant scintillation effects, depending on the telescope size.

I would not overinterprete your current results.  You might look at the
very interesting paper by Brian Warner (the South African professional
Warner):
"Rapid oscillations in cataclysmic variables"  2004, PASP 116, 115.
Arne