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Long-Wavelength Observations of Repeating FRB 20180916B

Presentation #302.01 in the session Transients and Time-domain Astronomy.

Published onJul 01, 2023
Long-Wavelength Observations of Repeating FRB 20180916B

Fast Radio Bursts are isolated, short, highly-dispersed radio pulses for which no clear theoretical picture has emerged. Most FRB detections have been at GHz frequencies or higher, and do not repeat. However, the Canadian Hydrogen Intensity Mapping Experiment (CHIME) FRB Collaboration has reported detections of about 25 repeating FRBs between 400 and 800 MHz. FRB 20180916B has a 16-day periodicity with a 4-day active period. It has been detected by the Low Frequency Array (LOFAR) as low as 110-188 MHz.

Using the Long Wavelength Array (LWA1 and LWA-SV), we have observed FRB 20180916B between 40-80 MHz during the active periods of its 16-day cycle. More recently, we began using observations triggered by alerts from the CHIME/FRB VOEvent Service. To help understand these radio sources it is vital to see what their behavior might be at sub-100 MHz frequencies, and what turnover frequency might be in their spectra. We will report on the results of these observations.

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