Sneha Honnappa, Wojciech Lewandowski, Jaroslaw Kijak, Avinash A. Deshpande, Janusz Gil, Olaf Maron, Axel Jessner
A successful attempt was made to analyse about 6000 single pulses of PSR
B1133+16 obtained with the 100-meter Effelsberg radio-telescope. The high
resolution (60 micro-seconds) data were taken at a frequency of 8.35 GHz with a
bandwidth of 1.1 GHz. In order to examine the pulse-to-pulse intensity
modulations, we performed both the longitude- and the harmonic-resolved
fluctuation spectral analysis. We identified the low frequency feature
associated with an amplitude modulation at f4 ~ 0.033 P1^(-1), which can be
interpreted as the circulation time P4 ~ 30 P1 of the underlying subbeam
carousel model.
Despite an erratic nature of this pulsar, we also found an evidence of
periodic pseudo-nulls with P4 = 28.44 P1. This is exactly the value at which
Herfindal & Rankin found periodic pseudo-nulls in their 327 MHz data. We thus
believe that this is the actual carousel circulation time in PSR B1133+16,
particularly during orderly circulation.
View original:
http://arxiv.org/abs/1109.1429
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