gll_psc_v08.fit
===============

LAT 2-year Point Source Catalog (FITS format)
http://fermi.gsfc.nasa.gov/ssc/data/access/lat/2yr_catalog/

gll_iem_v02_P6_V11_DIFFUSE.fit
==============================

LAT Background Model
Pass 6 (V11) Diffuse (front+back)
P6_V11_DIFFUSE
http://fermi.gsfc.nasa.gov/ssc/data/access/lat/BackgroundModels.html
http://fermi.gsfc.nasa.gov/ssc/data/analysis/software/aux/gll_iem_v02_P6_V11_DIFFUSE.fit

rass_m.fits
===========

Maps of the Soft X-ray Diffuse Background from the ROSAT XRT/PSPC 
  All-Sky Survey are available in three energy bands, in FITS as well 
  as in GIF format. Clicking on the small images will display full-size 
  (842*595) versions (140 kB). If you want to directly download the
  files set your browser to "load to local disk..." 

http://heasarc.gsfc.nasa.gov/docs/rosat/survey/sxrb/

3/4 keV band (Fig.5b, comparable to Wisconsin M band)