Jul 5 – 10, 2021
Europe/Rome timezone

Searching for Lensed Fast Radio Bursts with CHIME/FRB

Jul 5, 2021, 7:02 PM
Talk in the parallel session What can we learn from a growing sample of Fast Radio Bursts? What Can We Learn from a Growing Sample of Fast Radio Bursts?


Calvin Leung


Gravitational lensing of fast radio bursts (FRBs) on timescales of nanoseconds to milliseconds is sensitive to the presence of massive bodies up to $100 M_{\odot}$--including brown dwarves, rogue stars, and exotic objects like MACHOs or primordial black holes. The CHIME telescope, a widefield low-frequency radio interferometer operating over the frequency range of 400-800 MHz, detects several FRBs every day, and I will describe the status of our search for a lensed FRB. Our coherent time-domain search uses data from the CHIME/FRB baseband system and a procedure similar to geodetic VLBI cross-correlation. This allows us to resolve images with $10^{-8}$ to $10^{-1}$ second lensing delays, and disentangles intrinsic FRB morphology from genuine multipath propagation induced by a lens.

Primary authors

Calvin Leung Mr Zarif Kader (McGill University) Prof. Matt Dobbs (McGill University) Prof. Kiyoshi Masui (MIT)

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