Well, I was originally trying to perform my analysis on difference images (subtract one image with identical parameters from another in order to remove flat field effects) but I'm getting ridiculously large values for the std dev (in the 1000s) which doesn't seem right. Am I being naive in assuming I can simply subtract the values of one raw array from the other?
Well, I was originally trying to perform my analysis on difference images (subtract one image with identical parameters from another in order to remove flat field effects) but I'm getting ridiculously large values for the std dev (in the 1000s) which doesn't seem right. Am I being naive in assuming I can simply subtract the values of one raw array from the other?