Alpy 600 and photometry
I am returning to variables after concentrating on binary astrometry for a while. At the Okie-Tex star party I had a nice conversation with Jim Edling about the Alpy 600. He directed me to Christian Buil who sent me a link to this documentation:
It seems that one can do two things: obtain a spectrum and reduce the data to BVR photometry using only the Alpy 600, yielding four results from one run, three of which (BVR) could be entered into the existing AAVSO databases. Since the entire unit costs less than a new CCD, I am definately interested. However, I am not sure of the actual flow of the data collecting. I assume that I must get my transforms from Landolt stars. May I then assume I can use the pseudostandards in any paticular AAVSO chart field? This would be a kind of differential spectrophotometry?
Anyone figure out a protocol for using this spectrograph in the spectrophotometric mode?