DSLR photometry, beginner's first impressions
I'm still experimenting with camera setups to get good raw data, but I'm already running into some problems:
1) I'm using the GREEN color filter info from my DSLR images because I read it's somewhat closest to the V filter band and could be used for reporting. I'm using eta and zeta Aur as comparison stars. Well, the difference in magnitude between zeta and eta Aur comes out about right (0.6 = 3.8-3.2), but I then get as low as 2.6 - 2.7 (!!) for eps Aur itself ...hey, it's supposed to eclipse, not brighten !!! But...if we work with the GREEN DSLR photosite filter, can we just take the comparison numbers from the V band ?? Are there comparison magnitudes for the green band one should use instead?
2) I'm working with AIP4WIN which does everything very nicely, BUT it's quite tedious if you work on many frames as recommended. So I'd like to have a scripted way to at least
- read all the raw images of a session (Olympus raw image file format) and
- extract and save the green subimages, e.g. to fits files
The combination to a master dark frame and the stacking can then again be done in AIP4Win. Is there a good software for this batch color splitting?
Thanks in advance