GCN Circular 16030
Subject
GRB 140323A: Swift/UVOT Upper Limits
Date
2014-03-23T19:47:02Z (10 years ago)
From
Massimiliano de Pasquale at MSSL-UCL <m.depasquale@ucl.ac.uk>
M. De Pasquale (UCL-MSSL) and E. Troja (NASA/GSFC/UMCP)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 140323A
106 s after the BAT trigger (Troja et al., GCN Circ. 16027).
No optical afterglow consistent with the XRT position
(Osborne et al. GCN Circ. 16028) 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 106 256 147 >20.4
u_FC 319 569 246 >19.5
white 106 793 186 >20.5
v 649 5918 216 >19.1
b 574 12334 773 >20.2
u 319 6532 462 >19.9
w1 698 6328 216 >19.5
m2 5923 16174 725 >20.4
w2 798 818 19 >17.9
The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.14 in the direction of the burst
(Schlegel et al. 1998).