FRB 250316A: optical follow-up observation with Tomo-e Gozen
ATel #17084; Yuu Niino (U. Tokyo) on behalf of the Tomo-e Gozen Collaboration
on 18 Mar 2025; 10:47 UT
Credential Certification: Yuu Niino (yuuniino@ioa.s.u-tokyo.ac.jp)
Subjects: Optical, Fast Radio Burst
Referred to by ATel #: 17101
We conducted follow-up observations of FRB 20250316A (ATel #17081) on 2025-03-17, using the Tomo-e Gozen camera (optical CMOS imager, Sako et al. 2018, SPIE, 10702, 107020J) mounted on the 105-cm Kiso Schmidt telescope. The total exposure time is 9 min (4 min starting 2025-03-17 10:19 + 5 min starting 2025-03-17 16:07, UTC).
Image subtraction is performed using the images of the same field taken more than 2 yrs before the FRB event by the same camera as templates. No transient object was found in the subtraction image within ~ 10 arcmin from the best estimate localization of the FRB. We estimate the 5-sigma limiting magnitude to be 20.4 mag compared to nearby stars in the Gaia DR3 catalog (Gaia Collaboration, et al. 2023, A&A, 674, A1).
