I posted this a few days ago, but I think it got overlooked because it was at the bottom of an old thread so I'm reposting here. Just want to make sure I have calculated my transfomation coefficients correctly:
I have been working over the past few days to determine the transfomation coefficients for my system (I have a B and V filter). I realize that this is a topic that pops up periodically, so I tried to learn as much as I could from other people's experiences in the forum. I wound up imaging M67 using the process described in Priscilla Benson's paper. Attached is my excel worksheet with my results. I feel pretty confident that I did the process correctly which means I probably made a mistake. I would appreciate feedback on any glaring errors.
I am unsure of the best practice for using the coefficient information. I have already entered my values into VPhot (Tv, Tb, and Tbv). For a single target should I take 3 images in each filter, stack each group of 3, and then perform the transformation? Typically, I have used time series to get a better idea of the uncertainty, but that doesn't seem to be an option here. I just want to make sure that after having gone through the process of figuring out the coefficients I am using them correctly.