GCN Circular 28662
Subject
GRB 201015A: Swift/UVOT Detection
Event
Date
2020-10-16T20:49:02Z (5 years ago)
From
Frank Marshall at Swift/UVOT <marshall@milkyway.gsfc.nasa.gov>
F. E. Marshall (NASA/GSFC) and V. D'Elia (SSDC)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 201015A
3217 s after the BAT trigger (D'Elia et al., GCN Circ. 28632).
A weak source consistent with the optical position
(Malesani et al. GCN Circ. 28637)
is detected in the initial UVOT exposures.
Preliminary detections and 3-sigma upper limits using the UVOT photometric system
(Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the early exposures are:
Filter T_start(s) T_stop(s) Exp(s) Mag
white 3217 3367 147 20.69 +/- 0.28
white 4402 4602 197 20.33 +/- 0.16
v 3375 4949 331 >19.3
b 4197 4397 197 20.47 +/- 0.33
u 3991 4191 197 >19.7
w1 3786 3986 197 >19.3
m2 3579 3779 197 >18.8
w2 4608 4808 197 >19.4
The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.34 in the direction of the burst
(Schlegel et al. 1998).