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7th of May 2020
Transient Events at Parkes
by Zhang et al.
Zhang et al. have re-processed the observations obtained from 1997 to 2001 with the Parkes Multibeam receiver system in order to identify transient events -- short burts of radio emission. They have created a database that records over 568 million pulse candidates generated during this search -- a fraction of which are due to radio frequency interference. In addition to a discovering a new fast radio burst, they detect large single pulsars from a number of known pulsars, and also present five single pulse candidates from unknown sources, but with Galactic dispersion measures.

The image above shows pulse profiles for two of the single pulse events with Dispersion Measures that imply an origin within our Galaxy. The time resolution of SPC 991113 (left) is 52 milli-seconds, and of SPC 000115 (right) is 12 milli-seconds. The bottom panel shows the frequency-time plane, the central panel shows the event after being de-dispersed at the optimized Dispersion Measure, whilst the top panel is the integrated pulse profile using an arbitrary flux scale. More details are given in the paper, to be published in Astrophysical Journal Supplement.

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