Single pulse study of the millisecond pulsar P1937+214

Preliminary results of the search for strong pulses from the millisecond pulsar PSR 1937+214, based on the Arecibo observations of this object at 431 MHz and 1400 MHz are presented. It is shown that its single pulse behavior does not differ from that of the slow pulsars: detectable single pulse emission is present in nearly every period and strong pulses (about 100 times the noise level) occur approximately every 400,000 periods. Results of the correlation analysis of the data indicate that pulse intensities are correlated over 3-4 periods and that there may be a significant correlation between main pulse and interpulse emission. It is also demonstrated that the intensity statistics of the main pulse and the interpulse are practically identical. 9 references, 5 figures