Aligning and stacking spectra
Please can anyone advise if software is available to align and average sets of 16 bit spectral data in Fits files? I've considered turning down the camera gain to reduce the signal dynamic range to ten bits and then using the remaining 6 to allow stacking and manage skyglow, but this would reduce the range of objects that could be examined.
I've tried Isis and Iris but neither of them were able to display my Fits files and they stacked rather than averaged the data. RSpec did average the data but it worked by converting 16 bit Fits files to video in 8 bit format and I'm not sure if it aligns the spectra. Excel is powerful and straightforward but tedious. So I'm thinking of writing a routine in Python, but don't want to spend the time if there is software already available that will do the job.
Any thoughts/advice on this would be much appreciated.