Maxim – Thanks, I’m almost there. I had forgotten the “Get comparison stars” step! Now I get a fit. The only problem remaining is when I click on the object the flux/magnitude etc are all zero. What am I doing wrong?
One other question – Am I right that the ensemble fit graph is upside down, i.e. the brightest magnitudes are in the lower left corner. Not a problem but I would just like to understand.