[Aavso-photometry] GJ436b comp stars...constant over time?

[Jim Roe]

Tom Krajci wrote:
> A bunch of folks have been working on GJ436b for some time.  Two comp 
> stars are most often used:  HIP 57103 (3 - 4 arcminutes NE) and GSC 
> 1984-1884 (3 - 4 arcmin N).
> 
> Have these comps shown any variability over time?


I'm not sure which stars you are referring to, but my one session with 
the star on 20080301 for about two hours showed the stars marked on the 
AAVSO chart as 107, 106, 114 and 116 were constant at the 0.006 mag 
level for that time interval.

Jim Roe [ROE]
Wentzville, Missouri