Investigation of the unique nulling properties of PSR B0818−41

We investigate the unique nulling properties PSR B0818-41 with the GMRT at 325 and 610 MHz. A strong trend in the intensity fluctuations of the individual pulses just before and after the nulls is observed by us for this pulsar. In addition, we report a possible connection between the intensity fluctuations and the drift rate of subpulses just before and after the nulls. We find some very specific and well correlated changes in the radio emission properties of PSR B0818-41 when the emission restarts after a null. These could imply that the phenomenon of nulling is associated with some kind of a "reset" of the pulsar radio emission engine.