Tv. Smirnova et al., STATISTICS OF PSR-1133+16 MICROPULSE EMISSION DETERMINED AT WIDELY SPACED FREQUENCIES, Astronomy and astrophysics, 286(3), 1994, pp. 807-814
We have investigated the statistics of signals obtained with high time
resolution at 1400 MHz and at 102.5 MHz from the pulsar PSR 1133+16 a
t pulse longitudes corresponding to both components of the average pul
se profile. Observations were not simultaneous at both frequencies. We
have determined the probability for the presence of microstructure an
d for the presence of quasi-periodicities for the two observing freque
ncies. Probability of microstructure appearance has been determined to
be the cause of decrease of the average microstructure component at h
igh frequencies. We show that the distribution of characteristic times
of microstructure is substantially different for pulse components I a
nd II of the average pulse profile at 1400 MHz, although the probabili
ty for the presence of microstructure and for the presence of quasi-pe
riodicities is independent of the longitude of the pulse component. Th
e average characteristic time of microstructure is the same at both pu
lse component longitudes at both frequencies. The observations are int
erpreted in terms of pulsar emission models.