Day 186 Wednesday 1st October 2014 Transforming the QX Cas photometry.
Back to the variable star QX Cas in the open cluster NGC 7790 from Monday. I now need to transform Monday's result. For that I need to look also at the image taken through a B filter.
Here are the results
So using these results and the previous V filter values from Monday in an Excel spreadsheet
I get the transformed value of V = 10.201
The Variable Star Reference Index has the following data concerning QX Cas
My tests this week of photometry of variable stars are based on single images, I need to use multiple images in practice for values that would be submitted to the AAVSO or the BAA Variable Star Section. I also need to ensure comprehensive reduction and a careful choice of comparison stars.