These data are from the Compton GRO EGRET team. Data are from all pointings of the EGRET instrument in the verification phase and phase 1-4 of the Compton mission. The maps exist in energies 30-100 MeV, 100-10000 MeV, and as a multi-dimensional, 10 channel survey. For the multi-dimensional survey, channels 1-3 comprise energies less than 100 MeV, and channels 4-10 comprise energies greater than 100 MeV. Note that the energies are not uniformly split among the channels.

The EGRET 3D map is comprised of ten channels with the following energy ranges:

Channel 1 30-50 MeV Channel 2 50-70 MeV Channel 3 70-100 MeV Channel 4 100-150 MeV Channel 5 150-300 MeV Channel 6 300-500 MeV Channel 7 500-1000 MeV Channel 8 1000-2000 MeV Channel 9 2000-4000 MeV Channel 10 4000-10000 MeV

The default two dimensional image for the EGRET 3D survey is an average of Channels 4 - 10 (energies greater than 100 MeV). Provenance: EGRET Instrument team, NASA Goddard Space Flight Center. This is a service of NASA HEASARC.