The Structure and luminosities of a Fast Radio Burst

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High Energy Astrophysical Phenomena

The Structure and luminosities of a Fast Radio Burst

A Bright Fast Radio Burst from FRB 20200120E with Sub-100-Nanosecond Structure

We present the detection of a bright radio burst at radio frequencies between 2.2--2.3 ghz with the deep space network 70 m dish (dss-63) from the repeating fast radio burst (frb)~20200120e.

We find that the burst has a duration of roughly 30 and is comprised of several narrow components with typical separations of 2--3 the narrowest component has a width of 100 ns, which corresponds to a light travel time size as small as 30m, the smallest associated with an frb to date.

The peak flux density of the narrowest burst component is 270 jy.

We estimate the total spectral luminosityof the narrowest component of the burst to be 4 erg which is a factor of above the luminosities of the so-called"nanoshots"associated with giant pulses from the crab pulsar.

This spectral luminosity is also higher than that of the radiobursts detected from the magnetar sgr 1935+2154 during its outburst in 2020, but it falls on the low-end of the currently measured luminosity distribution of extragalatic fast radio bursts.

Authors

Walid A. Majid, Aaron B. Pearlman, Thomas A. Prince, Robert S. Wharton, Charles J. Naudet, Karishma Bansal, Mohit Bhardwaj, Tomas Cassanelli, Calvin Leung, Bradley W. Meyers, Emily Petroff, Ingrid H. Stairs, Shriharsh P. Tendulkar

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