NICER observation list: Target ID 763601

Fast radio bursts (FRBs) are extragalactic pulses of radio emission, whose source types are still unknown. We propose to carry out a high time resolution search for X-ray emission from nearby repeating FRB sources using simultaneous X-ray/radio observations with NICER and the Effelsberg, GBT, and CHIME radio telescopes. The activity of our targets will be monitored in the 400-800 MHz band with CHIME, and simultaneous X-ray/radio observations will be coordinated when our targets display a radio outburst. We propose for a total of 100 ks of ToO observations to observe up to 5 nearby repeating FRBs soon after radio activity is detected. These observations will be used to search for prompt and persistent X-ray emission from FRBs. The results will significantly constrain the origins of FRBs.