GCN Circular 28555
Subject
GRB 201001A: Swift/UVOT Upper Limits
Date
2020-10-03T19:24:16Z (4 years ago)
From
Mike Siegel at PSU/Swift MOC <mhs18@psu.edu>
A. Belles (PSU) and K. K. Simpson (PSU)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 201001A
120 s after the BAT trigger (Simpson et al., GCN Circ. 28539).
No optical afterglow consistent with the XRT position
(Simpson et al. GCN Circ. 28539)
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 120 270 147 >21.1
u_FC 279 529 246 >19.8
white 120 1525 392 >21.1
v 611 1575 117 >18.8
b 535 1501 97 >18.9
u 279 1476 324 >19.8
w1 660 1452 97 >19.1
m2 635 1427 97 >19.7
w2 586 1550 117 >19.6
The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.12 in the direction of the burst
(Schlegel et al. 1998).