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

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