[Aavso-photometry] HD 80606 Opportunity

[Geir Klingenberg]

Hi

I got 4 hours of baseline photometry last night. The data is posted to
AAVSO via WebObs. I used HD 80607 as comp star and got a nice and
steady light curve at 8.924+/-0.007 mag (untransformed). I also tried
to use GSC 3431:892 as the comp star but did in fact get a slightly
lower precision.

By the way, I use AIP4Win and have the same aperture drift problem as
others have reported. I have been able to work around this, though.
The problem seems to occur when one of the close companions are chosen
to be the target (or the V star in AIP4Win). If I instead choose GSC
3431:892 as the target (V), HD 80606 as the comp star (C) and some
other random star as the check star (K) it works just fine (don't ask
me why ...). I will then have to make 2 runs, one with HD 80606 as the
comp star and one with HD 80607 as the comp star. I then import the
results to a spreadsheet an manually derive the measurements.

The last couple of weeks has been superb here in northern Norway, but
the weather forecast does not look too promising. I just hope the
great weather sticks around for a couple of days more ...

Geir Klingenberg