SIMBAD references

2025MNRAS.537.1070T - Mon. Not. R. Astron. Soc., 537, 1070-1092 (2025/February-3)

Discovery of 26 new Galactic radio transients by MeerTRAP.

TURNER J.D., STAPPERS B.W., TIAN J., BEZUIDENHOUT M.C., CALEB M., DRIESSEN L.N., JANKOWSKI F., PASTOR-MARAZUELA I., RAJWADE K.M., SURNIS M., KRAMER M., BARR E.D. and BEREZINA M.

Abstract (from CDS):

Radio searches for single pulses provide the opportunity to discover one-off events, fast transients, and some pulsars that might otherwise be missed by conventional periodicity searches. The MeerTRAP real-time search pipeline operates commensally to observations with the MeerKAT telescope. Here, we report on 26 new Galactic radio transients, mostly rotating radio transients (RRATs) and also the detection of one RRAT and two pulsars that were independently discovered by other surveys. The dispersion measures of two of the new sources marginally exceed the Galactic contribution depending on the electron density model used. Using a simple method of fitting a Gaussian function to individual pulses, and obtaining positions of arcsec accuracy from image-based localizations using channelized voltage data from our transient buffer, we have derived timing solutions spanning multiple years for five sources. The timing parameters imply ages of several Myr and low surface magnetic field strengths which is characteristic of RRATs. We were able to measure spin periods for eight more transients, including one source which appears to rotate every 17.5 s. A majority of the sources have only been seen in one observation, sometimes despite multiple return visits to the field. Some sources exhibit complex emission features like component switching and periodic microstructure.

Abstract Copyright: © 2025 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society.

Journal keyword(s): stars: neutron - pulsars: general - radio continuum: transients

Simbad objects: 32

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