EVIDENCE OF PULSED X-RAY-EMISSION FROM RADIO PULSAR PSR1951+32

Evidence of X-ray pulsations from PSR1951+32 have been obtained in both EINSTEIN IPC (Image Proportional Counter) and HRI(High Resolution Imager) data in our analysis of Einstein Observatory data on CTB 80 area. The phase light curves of these two datasets show similar single peak structure. The period values are significantly different from those predicted by radio observations processed about 7 years later, and shows the spin rate of the pulsar in April 1980 is higher than that in October 1979. Possible explanations for this phenomenon are discussed.