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17th of September 2019
Simultaneous observations of an RRAT with the MWA and Parkes
by Meyers et al.
Rotating Radio Transients (RRATs) are a type of pulsar characterised by their sporadic bursting emission of single pulses on time scales of minutes to hours. In addition to the difficulty involved in detecting these objects, low-frequency (< 300 MHz) observations of RRATs are sparse, which makes understanding their broadband emission properties in the context of the normal pulsar population problematic. Meyers et al. have presented the simultaneous detection of RRAT J2325−0530 using the Murchison Widefield Array (154 MHz) and Parkes radio telescope (1.4 GHz). They find that the distribution of time between subsequent pulses is consistent with a Poisson process and find no evidence of clustering over the ∼ 1.5 hr observations, and also produce the first polarimetric profile of this pulsar.

The figure above shows examples of coincident single pulses from RRAT J2325-0530 at 1.4 GHz (Parkes; top row) and 154 MHz (MWA; bottom row). The pulses have been absolutely aligned, in that the same ephemeris was used to reduce the data sets. The number of rotations since the first simultaneously observed rotation of the pulsar are also given for each pair. Pulse 527 is the brightest pulse in the Parkes band of the coincident pulses, while pulse 1292 is the brightest in the MWA band. Pulse 4318 is a relatively average example of a simultaneous pulse. More details are given in the paper, to be published in Publications of the Astronomical Society of Australia.

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