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GBM GRBs More than one user noticed that gtbin complained about the times being out of range for the simulated GBM data for the GRBs. This is a direct consequence of the incorrect MJDREF used in the FT2 file that was used for generating the LAT GRBs, and so is straightforward to resolve.
Galactic diffuse emission From Jean Ballet: "The latitude part of the WCS keywords for the Galactic diffuse cube are incorrect. They currently stand at CRPIX2=1, CRVAL2=-89.75. In the absence of any other indication, a compliant WCS tool (like ds9) interprets this as a cartesian projection in spherical coordinates such that the equatorial plane passes by this point (very close to the South pole), not really what you want. Look at Fig 2 of Calabretta and Greisen 2002 and the associated text which makes it very clear. The correct way to specify a cartesian projection is to set the reference point exactly on the equatorial plane you want (the Galactic plane in your case). CRPIX2=180.5 and CRVAL2=0. Also, 'GLON' should be 'GLON-CAR' and 'GLAT' should be 'GLAT-CAR' in CTYPE."