X-ray and UV observations of a bright non-repeating FRB at T0+236 seconds
ATel #16233; Aaron Tohuvavohu (U Toronto), Jamie Kennea (Penn State), Phil Evans (U Leicester), James DeLaunay (Penn State)
on 7 Sep 2023; 13:54 UT
Credential Certification: Aaron Tohuvavohu (a.tohuvavohu@mail.utoronto.ca)
Subjects: Radio, Ultra-Violet, X-ray, Fast Radio Burst
The Neil Gehrels Swift Observatory responded with its newly commissioned continuous commanding ToO mode, to rapidly observe the bright CHIME FRB event #315839890 (T0: 2023-09-05T15:18:46.482734), promptly slewing, landing on target, and beginning exposure at T0+236 seconds.
The XRT and UVOT fields of view fully cover the 95% containment region (radius 7.5') reported by CHIME/FRB.
Observations continued for 3.9 ks of integrated exposure, with XRT taking data in Photon Counting (PC) mode and UVOT observing in event mode (11 ms timing) with the u filter.
3 uncatalogued X-ray sources are found in the FRB's localization region, consistent with expectations at the depth achieved. None of these sources show signs of variability or otherwise distinguish themselves from background contaminants. The average 3 sigma upper limit over the field was 1.8e-3 ct s-1 (0.3-10 keV).
No uncatalogued sources are detected in the UV, down to a 3 sigma point source limiting magnitude of 21.8 AB mag in the u filter.
This research has made use of the CHIME/FRB VOEvent Service.
