2023MNRAS.523.1389T

The effect of interplanetary plasma on pulsed pulsar radiation passing through is considered. The pulses of two rotating radio transients (J0609+16 and J1132+25) and a pulsar (B0320+39) detected on the Large Phased Array (Pushchino observatory) were analysed. It is shown that in observations at the frequency of 111 MHz, on elongations of 20°-40°, both an increase and a decrease in the number of received pulses are observed. The change in the number of pulses is explained by the distortion of the energy distribution of pulses due to interplanetary scintillation. These changes in the number of observed pulses are in qualitative agreement with the expected dependence of the scintillation index on the observed sources elongation. Analytical expressions are obtained that allow estimating the effective modulation index from observations of individual pulses for the power distribution of pulses by energy.