Scintillation Timescales of Bright FRBs Detected by CHIME/FRB

Kavli Affiliate: Kiyoshi Masui

| First 5 Authors: Eve Schoen, Calvin Leung, Kiyoshi Masui, Daniele Michilli, Pragya Chawla

| Summary:

We describe a pipeline to measure scintillation in fast radio bursts (FRBs)
detected by CHIME/FRB in the 400-800 MHz band by analyzing the frequency
structure of the FRB’s spectrum. We use the pipeline to measure the
characteristic frequency bandwidths of scintillation between $4-100$ kHz in 12
FRBs corresponding to timescales of $sim$2-40 $mu$s for 10 FRBs detected by
CHIME/FRB. For the other two FRBs, we did not detect scintillation in the
region our analysis is sensitive. We compared the measured scintillation
timescales to the NE2001 predictions for the scintillation timescales from the
Milky Way. We find a strong correlation to be an indication that in most
instances, the observed scintillation of FRBs can be explained by the Milky

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