Predicting future fast radio bursts to be detected by a new dedicated telescope in Taiwan

Simon Chien-Chang Ho^1*, Tetsuya Hashimoto², Tomotsugu Goto¹

¹Institute of Astronomy, National Tsing Hua University, Hsinchu City, Taiwan
²Department of Physics, National Chung Hsing University, Taichung City, Taiwan

* Presenter:Simon Chien-Chang Ho, email:hosimon259@gmail.com

Fast radio bursts (FRBs) are mysterious, millisecond flashes of radio light of unknown origin from far outside the Milky Way. These extragalactic radio signals were discovered about a decade ago, their astrophysical origin is still one of the biggest mysteries in the astronomy community. Up to now, the most successful project in finding FRBs has been CHIME. Due to its large field of view (FoV), CHIME has outperformed other radio arrays detecting about 500 FRBs since 2018. Taiwan plans to build a new telescope dedicated to detecting FRBs with an accurate localization capability, which will be the next frontier telescope in FRB science after CHIME. Because of the telescope’s unique fisheye design, it will have a massive 3600 deg² FoV, meaning its collecting area will be 25 times greater than CHIME. By using the scaling factor between CHIME and the new telescope, we predict the number of FRBs to be detected with the new telescope as ~1000/yr. With a similar approach as Hashimoto et al. (2020), we also estimate the probability to find gravitationally lensed FRBs, based on the latest observational constraints on their physical properties including the FRB luminosity functions, and their redshift evolutions. Spectroscopic observations to measure redshifts of localized FRBs will be the next important task in our project. With the fluence and i-band magnitude of the FRBs with identified hosts that have been observed so far, we also estimate the magnitude to be used for future follow-up spectroscopic observation to be ~22 mag_i-band.

Keywords: FRB, gravitational lensing