Cornell University
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Fast radio bursts (FRBs) are possibly the biggest enigma in astronomy

today. FRBs are brief (~ms), bright (often many Jy) flashes at ~GHz

frequencies.  While they are now known to be extragalactic, little

else is known about their origins.  One of the challenges in studying

FRBs has been localizing them well enough to tie them to host

galaxies, and hence get redshifts.  The Hydrogen Intensity and

Real-time Analysis eXperiment (HIRAX) is a planned array of 1024 6m

diameter radio telescopes that is slated to begin construction in the

South African Karoo desert later this year. One of its main goals is

to study FRBs, including localizing their host galaxies.  The Canadian

Hydrogen Observatory and Radio-transient Detector (CHORD) is a

proposed follow-on to CHIME/HIRAX, that will also search for and

localize FRBs. With localizations of large numbers of FRBs from

instruments like HIRAX and CHORD, FRBs hold great promise as probes of

cosmology and fundamental phsyics, as they provide an extraordinarily

precise measurement of the (redshift-weighted) line-of-sight integral

of the electron column density.  I will present how we plan to study

FRBs with HIRAX and CHORD, including some of what we hope to learn

about the universe

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