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Sorry, there was an incorrect URL in that email; corrected below. In general, you should be able to do photometry with a QC, but I have never seen anyone do so. I would worry a bit about linearity and antiblooming, so the first targets I would try would be a field with calibrated stars over a wide magnitude range and colors, such as M67 or NGC7790, so that you can look for systematic effects. Arne Arne Henden wrote: > You should probably read my article in JAAVSO on > "The M67 Experiment", where I showed how various unfiltered > CCD cameras compared with the standard system. An on-line > copy of that article is at > http://ftp.nofs.navy.mil/pub/outgoing/aah/m67/ > Brian Skiff is correct in that most unfiltered systems, especially > the older chips like the TC255, are R-like and you should use > Rc magnitudes for your reports (and mark the magnitudes as CR). > However, you can follow the steps in the paper and determine this > for yourself. > Arne > > HG LINDBERG wrote: > >> >> If I now doing some measurement on binary stars with this camera, what >> do I >> call the magnitude? QC or what. >> > > >
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