COMPTEL detections of the quasars 3C 273 and 3C 279

The COMPTEL experiment aboard the Compton Gamma Ray Observatory, sensitive in the energy range from ∼ 0.7 to 30 MeV, observed the high latitude region containing 3C 273 and 3C 279 during a 2-week period in June, 1991. A search for sources using a Maximum Likelihood Analysis revealed two statistically significant point-like excesses, the positions of which are consistent with those of 3C 273 and 3C 279. These sources are the first QSO's detected at MeV energies. In the Comptel energy domain their spectra appear to be greatly different