GCN Circular 14122
Subject
GRB 121229A: Swift/UVOT Upper Limits
Date
2012-12-29T19:01:22Z (12 years ago)
From
Samantha Oates at MSSL <sro@mssl.ucl.ac.uk>
S. R. Oates (MSSL-UCL) and E. Sonbas (NASA/GSFC/Adiyaman Univ.)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 121229A
155 s after the BAT trigger (Sonbas et al., GCN Circ. 14115).
No optical afterglow consistent with the optical position
(Varela et al. GCN Circ. 14117)
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 155 305 147 >20.9
u_FC 314 563 246 >19.9
white 155 6156 363 >21.2
v 644 6466 116 >18.9
b 570 5952 216 >20.5
u 314 5747 442 >20.1
w1 3947 4136 186 >20.0
m2 670 690 19 >17.6
w2 620 6362 216 >20.1
The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.16 in the direction of the burst
(Schlegel et al. 1998).