Re: GSC 1040-399 + new variable

[Arne Henden <aah@nofs.navy.mil>]

Michael Koppelman wrote:
> In the process one of my (would be) comp stars turned up variable. I 
> don't know if this is a noted TASS star or not, but we should have some 
> data. The amplitude is very small and the period very short so I don't 
> know what it is. See:
> 
> http://www.lolife.com/astronomy/gsc1040-431.jpg
> 
> It does not appear to be a known variable.
> 

With a peak-to-peak amplitude of about 0.03mag, it would not be in
the TASS variable list unless it has higher amplitude at V or Ic.
I always get nervous when I see flickering at this level, and look
closely at the images and/or DSS to see if either hardware or companion
is causing the variability.  By eye, it looks like it might be periodic,
which is good; periodic and low amplitude often indicates delta-scuti.
Color information might help in the identification.
Arne