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The Fermi Large Area Telescope (LAT) data have confirmed the pulsed emissionfrom all six high-confidence gamma-ray pulsars previously known from the EGRETobservations. We report results obtained from the analysis of 13 months of LATdata for three of these pulsars (PSR J1057-5226, PSR J1709-4429, and PSRJ1952+3252) each of which had some unique feature among the EGRET pulsars. Theexcellent sensitivity of LAT allows more detailed analysis of the evolution ofthe pulse profile with energy and also of the variation of the spectral shapewith phase. We measure the cutoff energy of the pulsed emission from thesepulsars for the first time and provide a more complete picture of the emissionmechanism. The results confirm some, but not all, of the features seen in theEGRET data.

Fermi Large Area Telescope Observations of Gamma-ray Pulsars PSR J1057-5226, J1709-4429, and J1952+3252