New Comptel Results on Pulsar Studies at Mev Energies

COMPTEL, aboard the Compton Gamma-Ray Observatory , has detected at MeV energies PSR B1951+32 and found indications for a signal from PSR B0656+14. In the combined COMPTEL { EGRET spectra it is apparent that the maximum luminosities of these objects are reached in the COMPTEL energy range, or at least spectral features/bumps are apparent. These spectra can be compared with those of four other pulsars for which the COMPTEL data provided evidence or indications of activity at MeV energies. Besides of the Crab pulsar, which follows approximately a power-law ux relation from keV to GeV energies, the spectral properties of the other ve pulsars { Vela, Geminga, PSR B1509-58 and the above mentioned new detections { require breaks/bends at MeV energies. This behaviour at MeV energies may play a decisive role in discriminating between current gamma-ray emission models.