Educational Material: FITS Liberator - The Andromeda galaxy Messier 31

This FITS Liberator Education Material includes:

f001a066.zip: A zip'ped FITS file from the Digitized Sky survey 2 of the Andromeda galaxy Messier 31 through a B filter. 69.6 MB  

f001a1hr.zip: A zip'ped FITS file from the Digitized Sky survey 2 of the Andromeda galaxy Messier 31 through an R filter. 59.2 MB  

f001a25o.zip: A zip'ped FITS file from the Digitized Sky survey 2 of the Andromeda galaxy Messier 31 through an I filter. 63.2 MB

m31_composite.zip: A zip'ped composite psd file of the three exposures. The file has been reduced to 8 Bit and 50% in dimensions to get the size down to 81.2 MB.
Please note that the middle layer (R band) needs to be resized (with a factor of approximately 101,15%) for the images to be aligned.