GCN Circular 32390
Subject
GRB 220710A: Swift/UVOT Upper Limits
Date
2022-07-14T06:28:25Z (2 years ago)
From
Alice Breeveld at MSSL-UCL <a.breeveld@ucl.ac.uk>
A.A. Breeveld (UCL-MSSL) and N. J. Klingler (GSFC/UMBC/CRESTII) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 220710A 242493 s after the GECAM/GUANO
trigger (Tohuvavohu et al., GCN Circ. 32375).
No optical afterglow consistent with the XRT position (Beardmore et al. GCN Circ. 32385) is detected
in the UVOT exposures.
Preliminary 3-sigma upper limits using the UVOT photometric system (Breeveld et al. 2011, AIP Conf.
Proc. 1358, 373) for the initial exposures are:
Filter T_start(s) T_stop(s) Exp(s) Mag
white 242493 287404 4429 >22.9
The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of
E(B-V) = 0.030 in the direction of the burst (Schlegel et al. 1998).