| Abstract : | Fast radio bursts (FRBs) are bright, millisecond-duration pulses, originating from unidentified sources. The dispersion measure (DM) of FRBs strongly suggests an extragalactic origin, however, the underlying emission mechanism and the nature of their sources remain elusive. Several theoretical models have been proposed to explain the emission mechanism behind FRBs, with magnetars emerging as a prominent candidate.
Magnetars are a subclass of neutron stars with an extremely high magnetic field, mainly detected via persistent high energy emission. In addition, some magnetars also show transient radio emission, like XTE J1810-197, the first ever magnetar detected at radio frequencies. Here we will present a study of bright pulses from the magnetar XTE J1810-197. The magnetar XTE J1810-197 has been regularly monitored using the upgraded Giant Metrewave Radio Telescope (GMRT), since its recent outburst in late 2018. This systematic monitoring aims to investigate the dynamic behavior and potential evolution of the outburst and the energetics of the single pulses. In our study of the bright single pulses, we analyze various properties in detail and compare these with the known properties of FRBs. In addition, by looking into the energetics of the bright pulses, our study also seeks to address crucial questions like (1) is it possible that the magnetar J1810-197 could emit a burst with energy comparable to that of the repeating FRBs or to that of the Galactic FRB 200428, and (2) if yes, over what timescales? Our results could also have significant implications for the understanding of the likelihood of FRB-like emission from the galactic magnetar population.
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