GCN Circular 10892
Subject
GRB 100625A: Swift/UVOT Upper Limits
Date
2010-06-26T17:38:46Z (14 years ago)
From
Wayne Landsman at GSFC/SSAI <wayne.b.landsman@nasa.gov>
W. Landsman (NASA/GSFC/Adnet) and S. Holland ((CRESST/USRA/GSFC) report
on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 100625A
56s after the BAT trigger (Holland et al., GCN Circ. 10884). No optical
afterglow consistent with the enhanced XRT position (Page et al., GCN
Circ. 10888) or the Gemini-South candidate afterglow position (Levan et
al. GCN Circ. 10887) is detected in the initial UVOT exposures.
Preliminary 3-sigma upper limits using the UVOT photometric system
(Poole et al. 2008, MNRAS, 383, 627) for the first finding chart (FC)
and subsequent exposures are:
Filter T_start(s) T_stop(s) Exp(s) Mag
-----------------------------------------------
white 87 206 147 >21.2 (FC)
u 269 519 246 >20.2 (FC)
white 87 11552 785 >22.6
v 598 5951 412 >20.3
b 524 10640 1117 >21.9
u 269 6522 614 >20.5
w1 4725 6362 393 >20.6
m2 4520 6157 393 >20.5
w2 4111 12302 1125 >21.5
The values quoted above are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.012 in the direction of the burst
(Schlegel et al. 1998).