GCN Circular 17392
Subject
GRB 150202A: Swift/UVOT Upper Limits
Date
2015-02-03T19:14:39Z (9 years ago)
From
Margaret Chester at PSU <chester@swift.psu.edu>
M. M. Chester (PSU) and H. A. Krimm (CRESST/GSFC/USRA)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 150202A
93 s after the BAT trigger (Krimm et al., GCN Circ. 17376).
No optical afterglow consistent with the XRT position (Beardmore et al.
GCN Circ. 17382) 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 93 243 147 >20.6
u_FC 305 555 246 >20.2
white 93 6568 624 >21.5
v 634 6980 530 >20.4
b 560 7617 350 >21.3
u 305 7594 756 >20.7
w1 683 7390 510 >20.9
m2 658 7185 452 >21.7
w2 610 6774 490 >20.7
The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.02 in the direction of the burst
(Schlegel et al. 1998).