GCN Circular 17580
Subject
GRB 150314A: Swift/UVOT Detection
Date
2015-03-14T18:04:29Z (9 years ago)
From
Lea Hagen at PSU <lea.zernow.hagen@gmail.com>
L. M. Z. Hagen (PSU) reports on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 150314A
95 s after the BAT trigger (Hagen et al., GCN Circ. 17573). We detect
a fading source consistent with the XRT position (Beardmore et al.
GCN Circ. 17575) and optical detections (Zheng & Filippenko GCN Circ.
17574, Trotter et al. GCN Circ. 17577) that is detected in all but the
bluest UVOT filters.
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 97 244 144 17.22 +/- 0.03
white 587 781 38 19.13 +/- 0.18
white 5472 5671 196 >21.02
v 75 85 9 15.48 +/- 0.13
v 637 657 19 17.75 +/- 0.33
v 4445 6082 390 >19.77
b 562 756 38 19.28 +/- 0.35
b 5266 5466 196 >20.32
u 307 556 245 18.86 +/- 0.14
u 712 6528 253 >20.14
uvw1 687 6485 412 >20.31
uvm2 4650 6280 391 >20.16
uvw2 613 5877 412 >20.46
The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.04 in the direction of the burst
(Schlegel et al. 1998).