Simultaneous Optical Non-detections of FRB 20220912A with KeplerCam
ATel #15699; Daichi Hiramatsu (Harvard), Edo Berger (Harvard), Allyson Bieryla (Harvard)
on 19 Oct 2022; 17:42 UT
Credential Certification: Daichi Hiramatsu (daichi.hiramatsu@cfa.harvard.edu)
Subjects: Optical, Fast Radio Burst
Referred to by ATel #: 15806
We observed the localization region of FRB 20220912A (ATel #15679, ATel #15693) with KeplerCam (field-of-view of 23 square-arcmin) mounted on the 1.2m Telescope at the Fred Lawrence Whipple Observatory, Arizona, USA. A series of 60-sec exposures in r band was obtained from 2022-10-18 05:08:12 to 05:41:52 UTC, where DSA-110 detected a burst during one of the KeplerCam exposures (ATel #15693). We find no obvious optical counterparts down to a typical limiting AB magnitude of 20 in the DSA-110 localization region after performing image subtraction using PS1 template images. To our knowledge, this is the deepest simultaneous optical limits (in terms of flux) obtained for any well-localized repeating FRBs to date. Further analysis and follow-up observations are planned.
