GCN Circular 24945
Subject
GRB 190630C: Swift/UVOT Upper Limits
Event
Date
2019-07-01T19:32:37Z (7 years ago)
From
Kira Simpson at PSU <kira.simpson1984@gmail.com>
GRB 190630C: Swift/UVOT Upper Limits
K. K. Simpson (PSU) and T. N. Ukwatta (LANL)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 190630C
136 s after the BAT trigger (Ukwatta et al., GCN Circ. 24927).
No optical afterglow consistent with the XRT position
(Goad et al. GCN Circ. 24930)
is detected in the initial UVOT exposures.
Preliminary 3-sigma upper limits using the UVOT photometric system
(Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the first
finding chart (FC) exposure and subsequent exposures are:
Filter T_start(s) T_stop(s) Exp(s) Mag
white_FC 157 307 147 >20.5
white 157 307 147 >20.5
v 136 412 32 >18.1
w2 367 387 19 >20.1
The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.11 in the direction of the burst
(Schlegel et al. 1998).