Correlation Properties of a Short Scale Microstructure of Pulsar Radio Emission within a 100 kHz Bandwidth

Abstract

The correlation of a radio emission microstructure of pulsars PSR 0809 + 74, PSR 0950 + 08 and PSR 1133 + 16 within a 100 kHz bandwidth at frequency 100 MHz has been investigated. It is shown that PSR 0809 + 74 and PSR 1133 + 16 micropulse structure shorter than -400 JJ.s is not retained for a 50 kHz frequency offset. The microstructure longer than 500 JJ.s is highly correlated inside a 100kHz bandwidth for PSR0809+74 and PSR 1133+16. For PSR 0950+08, micropulses longer than -150 JJ.s are correlated over the same range. So, for PSR 0809 + 74 and PSR 1133 + 16 the short scale micropulse (tp. < 400 JJ.s) emission is narrowed (i.e. the normalised bandwidth AI / fo of the short scale micropulses is less than 5 xl 0 - 4).