Program: GN-2020B-FT-201

Fast radio bursts (FRBs) are one of the most intriguing unsolved mysteries in astronomy. These bright millisecond transients are believed to hail from cosmological distances making them a promising tool to study the baryonic matter in the Universe. However, the origin of FRBs is still unknown and identifying the host galaxies especially for the nearby FRBs is essential to uncover their true nature. The CHIME/FRB experiment has recently discovered a nearby FRB, FRB190425A. In the optical archival data, we only found one galaxy that satisfies the maximum FRB redshift constraint. The probability of finding this galaxy by chance within the FRB field-of-view(FOV) is significantly small making it a very promising host candidate. To confirm this association, we propose to first perform MOS-N pre-imaging to check if there exist any other galaxies in the FRB FOV that were not detected in the archival data but satisfy the maximum redshift constraint. Based on that, we use either GMOS multi-object spectroscopy or long-slit spectroscopy to measure the redshifts and physical properties of the identified FRB host candidates. Due to small localization region and expected close proximity of the FRB host, FRB190425A offers a great opportunity for reliable host identification which could be the closest FRB host galaxy localized thus far.