MeerTRAP: Twelve Galactic fast transients detected in a real-time, commensal MeerKAT survey

Mechiel Christiaan Bezuidenhout, E. Barr, Manisha Caleb, Laura Nicole Driessen, Fabian Jankowski, Michael Kramer, Mateusz Malenta, Vincent Morello, Kaustubh Rajwade, Sotirios Sanidas, Benjamin Stappers, Mayuresh Surnis

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Abstract

MeerTRAP is a real-time untargeted search project using the MeerKAT telescope to find single pulses from fast radio transients and pulsars. It is performed commensally with the MeerKAT large survey projects (LSPs), using data from up to 64 of MeerKAT’s 13.96 m dishes to form hundreds of coherent beams on sky, each of which is processed in real time to search for millisecondduration pulses. We present the first twelve Galactic sources discovered by MeerTRAP, with DMs in the range of 33–381 pc cm−3. One source may be Galactic or extragalactic depending on the Galactic electron density model assumed. Follow-up observations performed with the MeerKAT, Lovell, and Parkes radio telescopes have detected repeat pulses from seven of the twelve sources. Pulse periods have been determined for four sources. Another four sources could be localised to the arcsecond-level using a novel implementation of the tied-array beam localisation method.
Original languageEnglish
Pages (from-to)1483–1498
JournalRoyal Astronomical Society. Monthly Notices
Volume512
Issue number1
Early online date9 Mar 2022
DOIs
Publication statusPublished - 1 May 2022

Keywords

  • surveys
  • ephemerides
  • pulsars: general
  • methods:data analysis

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