[Aavso-photometry] IL Aqr Sequence

[Arne Henden]

Why is the astrometry "not particularly great"?  Tycho2 is certainly
of the same astrometric quality as is UCAC; a few arcsec is completely
out of range for either catalog.
   I'm a little surprised that I don't see the exponential error
increase towards the faint end.  Are you deleting stars with high
error?
   Otherwise, looks promising.
Arne

Michael Koppelman wrote:
> Here is my updated sequence after two nights. A few notes:
> 
> 1. Astrometry is still against Tycho-2 and is not particularly great. It 
> looks like it is off by a few arc seconds. I have the UCAC2 disks but I 
> haven't loaded them yet.
> 2. The reported errors are the standard deviation of the two nights I 
> combined.
> 3. I have reasonable confidence in this within the stated errors. I made 
> some improvements in my pipeline so that it uses weighted averages, 
> which helps reduce the influence of bad frames. I also fixed a fairly 
> grievous bug.
>