The cosmic background at 0.75-30 MeV: A different view using COMPTEL's full imaging capability

We present a COMPTEL spectrum of the isotropic gamma-ray background that wa s obtained through a very different technique than used in our earlier work , but the results are in good agreement. No evidence for the 'MeV-bump' is seen. Previously, we determined the celestial isotropic emission by first i dentifying different instrumental background sources and then subtracting t hese from the total background spectrum. Now we have fully utilized the COM PTEL imaging capability to separate the uniform celestial emission from the instrumental background (and the non-isotropic galactic radiation).