AT2020hur: A Possible Optical Counterpart of FRB 180916B

Understand

The physical origin of fast radio bursts (FRBs) remains unclear.

• Finding multiwavelength counterparts of FRBs can be a breakthrough in understanding their nature.
• In this work, we perform a systematic search for astronomical transients (ATs) whose positions are consistent with FRBs.
• We find an unclassified optical transient AT2020hur ($\alpha=01^{\mathrm{h}} 58^{\mathrm{m}} 00.750^{\mathrm{s}} \pm 1$ arcsec, $\delta=65^{\circ} 43^{\prime} 00.30^{\prime \prime} \pm 1$ arcsec) that is spatially coincident with the repeating FRB 180916B ($\alpha=01^{\mathrm{h}} 58^{\mathrm{m}} 00.7502^{\mathrm{s}} \pm 2.3$ mas, $\delta=65^{\circ} 43^{\prime} 00.3152^{\prime \prime} \pm 2.3$ mas).