Submicrosecond time resolution observations of PSR0950+08

The observation of isolated unresolved 0.8μs micropulses is here reported, which, if the conventional assumption is made, result from emitting volumes less than 250 m in extent. It is shown that even with this high time resolution the observations are consistent with Rickett's amplitude modulated noise model for pulsar emission (see Astrophys. J. 197 : 185 (1975)) where all of the observed intensity fluctuations can be represented as the modulation of a more fundamental gaussian noise process. The observations were made in May 1976 with the Arecibo 350 m telescope using a 1.25 MHz receiver bandwidth centred at 430 MHz. (author)