Re: GSC 4414-1210

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

The .dat file is the result of two photometric nights; errors
are how well the two measures match and not Poisson.  If comparable
brightness stars have smaller error, then it is likely that the
star in question is variable.  I'd hate to bet the farm on two
measures, however.  It could be that this star is slightly saturated,
or that there is some close companion included in one night's aperture
but not the next, etc.
Arne

Michael Koppelman wrote:
> FYI, I still only have the one night on this but I redid my photometry 
> with Arne's sequence. I got Rc=11.235 with the 1-sigma of the program 
> star magnitudes being 0.009. When Arne did his sequence he got 
> Rc=11.245. What's interesting is his errors on that star were reported 
> as 0.021 but the errors on the next two brightest stars are 0.005 and 
> 0.001 respectively. I don't know how Arne calculates his errors, but 
> this star has higher errors in his sequence than the next 15 or so 
> brightest stars. Maybe this means he had some variation in there. It 
> seems the previous consensus is that this may have a period around 1.4 
> days. So far we have no verification of these 1.0m dips in the TASS data 
> but it may be a small amplitude something or other, too.
> 
> Cheers,
> Michael Koppelman
> 
> 
> 
>