A sudden period of high activity from repeating Fast Radio Burst 20201124A

Abstract

The repeating FRB 20201124A was first discovered by CHIME/FRB in November of 2020, after which it was seen to repeat a few times over several months. It entered a period of high activity in April of 2021, at which time several observatories recorded tens to hundreds more bursts from the source. These follow-up observations enabled precise localization and host galaxy identification. In this paper, we report on the CHIME/FRB-detected bursts from FRB 20201124A, including their best-fit morphologies, fluences, and arrival times. The large exposure time of the CHIME/FRB telescope to the location of this source allows us to constrain its rates of activity. We analyze the repetition rates over different spans of time, constraining the rate prior to discovery to $<3.4$ day${}^{-1}$ (at 3$\sigma$), and demonstrate significant change in the event rate following initial detection. Lastly, we perform a maximum-likelihood estimation of a power-law luminosity function, finding a best-fit index $\alpha =-4.6\pm 1.3\pm 0.6$, with a break at a fluence threshold of $F_{\min }\sim 16.6$~Jy~ms, consistent with the fluence completeness limit of the observations. This index is consistent within uncertainties with those of other repeating FRBs for which it has been determined.

19 pages, 6 figures

References in corpus (24)

• The Host Galaxy and Redshift of the Repeating Fast Radio Burst FRB 121102
• The First CHIME/FRB Fast Radio Burst Catalog
• The Repeating Fast Radio Burst FRB 121102 as Seen on Milliarcsecond Angular Scales
• A Second Source of Repeating Fast Radio Bursts
• A bimodal burst energy distribution of a repeating fast radio burst source
• Possible periodic activity in the repeating FRB 121102
• Nine New Repeating Fast Radio Burst Sources from CHIME/FRB
• Host Galaxy Properties and Offset Distributions of Fast Radio Bursts: Implications for their Progenitors
• A nearby repeating fast radio burst in the direction of M81
• Fast Radio Burst Morphology in the First CHIME/FRB Catalog
• Characterizing the FRB host galaxy population and its connection to transients in the local and extragalactic Universe
• Repeating behaviour of FRB 121102: periodicity, waiting times and energy distribution
• A sample of low energy bursts from FRB 121102
• A Local Universe Host for the Repeating Fast Radio Burst FRB 20181030A
• The host galaxy and persistent radio counterpart of FRB 20201124A
• Chronicling the Host Galaxy Properties of the Remarkable Repeating FRB 20201124A
• Polarization properties of FRB 20201124A from detections with the 100-m Effelsberg Radio Telescope
• An analysis pipeline for CHIME/FRB full-array baseband data
• The Fast Radio Burst FRB 20201124A in a star forming region: constraints to the progenitor and multiwavelength counterparts
• Burst properties of the highly active FRB 20201124A using uGMRT
• Observational effects of banded repeating FRBs
• Astrometric accuracy of snapshot Fast Radio Burst localisations with ASKAP
• FRB 121102: a star quake-induced repeater?
• Energy and waiting time distributions of FRB 121102 observed by FAST

Cited by in corpus (35)

• A fast radio burst source at a complex magnetised site in a barred galaxy
• CHIME/FRB Discovery of 25 Repeating Fast Radio Burst Sources
• Repeating fast radio burst 20201124A originates from a magnetar/Be star binary
• FAST observations of an extremely active episode of FRB 20201124A: I. Burst morphology
• Inferring the Energy and Distance Distributions of Fast Radio Bursts using the First CHIME/FRB Catalog
• FAST observations of an extremely active episode of FRB 20201124A: II. Energy Distribution
• An FRB Sent Me a DM: Constraining the Electron Column of the Milky Way Halo with Fast Radio Burst Dispersion Measures from CHIME/FRB
• Circularly polarized radio emission from the repeating fast radio burst source FRB 20201124A
• A burst storm from the repeating FRB 20200120E in an M81 globular cluster
• FAST observations of an extremely active episode of FRB 20201124A: III. Polarimetry
• Temporal Scattering, Depolarization, and Persistent Radio Emission from Magnetized Inhomogeneous Environments Near Repeating Fast Radio Burst Sources
• Spectropolarimetric variability in the repeating fast radio burst source FRB 20180301A
• Repeating fast radio bursts reveal memory from minutes to an hour
• Prospects for Detecting Fast Radio Bursts in Globular Clusters of Nearby Galaxies
• A Comprehensive Analysis on Repeating Fast Radio Bursts
• Limits on Simultaneous and Delayed Optical Emission from Well-localized Fast Radio Bursts
• A Nançay Radio Telescope study of the hyperactive repeating FRB 20220912A
• The Northern Cross Fast Radio Burst project IV. Multi-wavelength study of the actively repeating FRB 20220912A
• Contemporaneous X-ray Observations of 30 Bright Radio Bursts from the Prolific Fast Radio Burst Source FRB 20220912A
• On the energy budget of starquake-induced repeating fast radio bursts
• Detection of a bright burst from the repeating FRB 20201124A at 2 GHz
• Fast radio bursts at the dawn of the 2020s
• The temporally evolving energy and waiting time statistics of two repeating fast radio bursts
• Non-detection of CHIME/FRB sources with the Arecibo Observatory
• An activity transition in FRB 20201124A: methodological rigor, detection of frequency-dependent cessation, and a geometric magnetar model
• The Low Frequency Perspective on Fast Radio Bursts
• Hints of a universal width-energy relation for classified fast radio bursts
• Rotation Measure study of FRB 20180916B with the uGMRT
• A targeted search for repeating fast radio bursts with the MWA
• Repeating fast radio bursts produced by a strange star interacting with its planet in an eccentric orbit
• Probing Cosmic Curvature with Fast Radio Bursts and DESI DR2
• 3D Localization of FRB 20190425A for Its Potential Host Galaxy and Implications
• Checking the Empirical Relations with the Current Localized Fast Radio Bursts
• Geometrical envelopes of fast radio bursts
• Simultaneous view of the FRB~180301 with FAST and NICER during a bursting phase