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

Majid, Walid A. and Pearlman, Aaron B. and Prince, Thomas A. and Wharton, Robert S. and Naudet, Charles J. and Bansal, Karishma and Connor, Liam and Bhardwaj, Mohit and Tendulkar, Shriharsh P. (2021) A Bright Fast Radio Burst from FRB 20200120E with Sub-100 Nanosecond Structure. Astrophysical Journal Letters, 919 (1). Art. No. L6. ISSN 2041-8205. doi:10.3847/2041-8213/ac1921.

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We have detected a bright radio burst from FRB 20200120E with the NASA Deep Space Network (DSN) 70 m dish (DSS-63) at radio frequencies between 2.2 and 2.3 GHz. This repeating fast radio burst (FRB) is reported to be associated with a globular cluster in the M81 galactic system. With high time resolution recording, low scattering, and large intrinsic brightness of the burst, we find a burst duration of ∼30 μs, comprised of several narrow components with typical separations of 2–3 μs. The narrowest component has a width of ≲100 ns, which corresponds to a light travel time size as small as 30 m. The peak flux density of the narrowest burst component is 270 Jy. We estimate the total spectral luminosity of the narrowest component of the burst to be 4 × 10³⁰ erg s⁻¹ Hz⁻¹, which is a factor of ∼500 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 radio bursts detected from the Galactic magnetar SGR 1935 + 2154 during its outburst in April 2020, but it falls on the low-end of the currently measured luminosity distribution of extragalatic FRBs, further indicating the presence of a continuum of FRB luminosities. The temporal separation of the individual components has similarities to the quasiperiodic behavior seen in the microstructure of some pulsars. The known empirical relation between the microstructure quasiperiodicity timescale and the rotation period of pulsars possibly suggests a possible pulsar as the source of this FRB, with a rotation period of a few milliseconds.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Majid, Walid A.0000-0002-4694-4221
Pearlman, Aaron B.0000-0002-8912-0732
Prince, Thomas A.0000-0002-8850-3627
Wharton, Robert S.0000-0002-7416-5209
Naudet, Charles J.0000-0001-6898-0533
Bansal, Karishma0000-0002-7418-7862
Connor, Liam0000-0002-7587-6352
Bhardwaj, Mohit0000-0002-3615-3514
Tendulkar, Shriharsh P.0000-0003-2548-2926
Additional Information:© 2021. The American Astronomical Society. Received 2021 May 29; revised 2021 July 21; accepted 2021 July 29; published 2021 September 22. We thank Paz Beniamini and Sterl Phinney for informative discussions during the preparation of this paper. A.B.P is a McGill Space Institute (MSI) Fellow and a Fonds de Recherche du Quebec—Nature et Technologies (FRQNT) postdoctoral fellow. R.S.W. is supported by an appointment to the NASA Postdoctoral Program at the Jet Propulsion Laboratory, administered by Universities Space Research Association under contract with NASA. M.B. is supported by an FRQNT Doctoral Research Award. C.L. was supported by the U.S. Department of Defense (DoD) through the National Defense Science and Engineering Graduate Fellowship (NDSEG) Program. E.P. acknowledges funding from an NWO Veni Fellowship. We thank the Jet Propulsion Laboratory's and California Institute of Technology's President's and Director's Research and Development Fund for supporting this work. We also thank Dr. Charles Lawrence and Dr. Stephen Lichten for providing programmatic support. In addition, we are grateful to the DSN scheduling team (Hernan Diaz, George Martinez, Carleen Ward), the Madrid Deep Space Communication Complex (MDSCC) staff for scheduling and carrying out these observations, and Steven Olson for his help in flux calibration of the data. A portion of this research was performed at the Jet Propulsion Laboratory, California Institute of Technology and the Caltech campus, under a Research and Technology Development Grant through a contract with the National Aeronautics and Space Administration. U.S. government sponsorship is acknowledged.
Group:Astronomy Department
Funding AgencyGrant Number
McGill Space InstituteUNSPECIFIED
Fonds de recherche du Québec - Nature et technologies (FRQNT)UNSPECIFIED
NASA Postdoctoral ProgramUNSPECIFIED
National Defense Science and Engineering Graduate (NDSEG) FellowshipUNSPECIFIED
Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO)UNSPECIFIED
JPL President and Director's FundUNSPECIFIED
Subject Keywords:Radio transient sources; Radio bursts
Issue or Number:1
Classification Code:Unified Astronomy Thesaurus concepts: Radio transient sources (2008); Radio bursts (1339)
Record Number:CaltechAUTHORS:20210603-122516654
Persistent URL:
Official Citation:Walid A. Majid et al 2021 ApJL 919 L6
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:109365
Deposited By: George Porter
Deposited On:03 Jun 2021 23:24
Last Modified:23 Sep 2021 20:11

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