... GALPROP skymaps viewable in Aladin.
This program performs this conversion, outputs both the original energy bins and energy-integrated spectra, and in addition convolves with a user-defined Gaussian both in energy bins and energy-integrated. Also outputs the spherical harmonic decomposition as HealPix, per energy bin. There is also an option to divide by a second HealPix file, for example to give intensity if file 1 is counts and file 2 is exposure, to give intensity.
Now also converts back.