Burst properties of the highly active FRB 20201124A using uGMRT

Abstract

We report the observations of the highly active FRb20201124A with the upgraded Giant Metrewave Radio Telescope at 550-750~MHz. These observations in the incoherent array mode simultaneously provided an arcsecond localization of bursts from \rss, the discovery of persistent radio emission associated with the host galaxy, and the detection of 48 bursts. Using the brightest burst in the sample ($F=108\mathrm{Jy}\mathrm{ms}$) we find a structure-maximizing dispersion measure of $410.8\pm 0.5{\mathrm{pc}\mathrm{cm}}^{-3}$. We find that our observations are complete down to a fluence level of $10\mathrm{Jy}\mathrm{ms}$, above which the cumulative burst rate scales as a power-law $R(>F)=10{\mathrm{hr}}^{-1}{\left(F/10\mathrm{Jy}\mathrm{ms}\right)}^{\gamma }$ with $\gamma =-1.2\pm 0.2$. We find that the bursts are on average wider than those reported for other repeating FRBs. We find that the waiting time between bursts is well approximated by an exponential distribution with a mean of $\sim 2.9$ min during our observations. We searched for periodicities using both a standard Fourier domain method and the Fast Folding Algorithm, but found no significant candidates. We measure bulk spectro-temporal drift rates between $-0.75$ and $-20{\mathrm{MHz}\mathrm{ms}}^{-1}$. Finally, we use the brightest burst to set an upper limit to the scattering time of 11.1~ms at 550~MHz. The localization of FRB20201124A adds strength to the proof-of-concept method described in our earlier work and serves as a potential model for future localizations and follow-up of repeating FRBs with the uGMRT.

arXiv comment11 pages, 8 figures, accepted for publication in MNRAS

References in corpus (25)

• A Repeating Fast Radio Burst
• Fourier Techniques for Very Long Astrophysical Time Series Analysis
• Dense magnetized plasma associated with a fast radio burst
• Periodic activity from a fast radio burst source
• FRB 121102 Bursts Show Complex Time-Frequency Structure
• A repeating fast radio burst source in a globular cluster
• A bimodal burst energy distribution of a repeating fast radio burst source
• Possible periodic activity in the repeating FRB 121102
• Fast Radio Burst 121102 Pulse Detection and Periodicity: A Machine Learning Approach
• Repeating behaviour of FRB 121102: periodicity, waiting times and energy distribution
• On the non-Poissonian repetition pattern of FRB121102
• Periodicity in recurrent fast radio bursts and the origin of ultra long period magnetars
• Giant pulses from the Crab pulsar: A wide-band study
• Optimal periodicity searching: Revisiting the Fast Folding Algorithm for large-scale pulsar surveys
• The host galaxy and persistent radio counterpart of FRB 20201124A
• Chronicling the Host Galaxy Properties of the Remarkable Repeating FRB 20201124A
• Simultaneous multi-telescope observations of FRB 121102
• The Slope of the Source-Count Distribution for Fast Radio Bursts
• Super-giant pulses from the Crab pulsar : Energy distribution and occurrence rate
• Detection of 15 bursts from FRB 180916.J0158+65 with the uGMRT
• An analysis of the time-frequency structure of several bursts from FRB121102 detected with MeerKAT
• Scintillation timescale measurement of the highly active FRB20201124A
• Evidence of a shared spectro-temporal law between sources of repeating fast radio bursts
• Burst timescales and luminosities link young pulsars and fast radio bursts
• A Bright Fast Radio Burst from FRB 20200120E with Sub-100-Nanosecond Structure

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