GCN Circular 16869
Subject
GRB 140930B: Swift/UVOT Upper Limits
Date
2014-10-01T13:22:17Z (10 years ago)
From
Alice Breeveld at MSSL-UCL <a.breeveld@ucl.ac.uk>
A. A. Breeveld (UCL-MSSL) and M. De Pasquale (INAF-IASFPA) report on
behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 140930B
201s after the BAT trigger (De Pasquale et al., GCN Circ. 16857).
No optical afterglow consistent with the XRT position (Goad et al., GCN
Circ. 16865) or the optical position (Tanvir et al., GCN Circ. 16861) 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 201 351 147 >20.2
white 201 2579 528 >20.9
v 507 2629 253 >18.8
b 433 2787 311 >19.9
u 407 2702 253 >19.4
w1 383 2678 253 >19.4
m2 358 2653 214 >19.3
w2 483 2605 253 >19.7
The magnitudes in the table are not corrected for the Galactic
extinction due to the reddening of E(B-V) = 0.03 in the direction of the
burst (Schlegel et al. 1998).