Temporal and Spectral Variations in the Amplitudes of Three Pulsars at 80 MHz

Abstract

The radioheliograph at Culgoora has recently been used to investigate the interesting changes which take place in the amplitudes of the pulses from PSR 0950+08, 1133+16 and 1919+21. The experiments had two main objectives: (i) to investigate the temporal changes in the spectrum near 80 MHz; (ii) to search for periodicities in the pulse amplitudes with periods extending up to one or two minutes.