GCN Circular 11447
Subject
GRB101204A: Swift/UVOT observations
Event
Date
2010-12-09T19:11:39Z (15 years ago)
From
Samantha Oates at MSSL <sro@mssl.ucl.ac.uk>
S. R. Oates (MSSL-UCL) & B. Sbarufatti (INAF-OAB/IASFPA) report
on behalf of the Swift-XRT and Swift-UVOT teams
The Swift/UVOT began settled observations of the field of GRB 101204A
126195 s after the BAT trigger (Cummings et al., GCN Circ. 11440).
In agreement with report from Nicuesa Guelbenzu et al., (GCN Circ.
11445), we
find the afterglow candidate in (Sbarufatti et al. GCN Circ. 11442)
to have faded. Preliminary magnitudes using the UVOT photometric
system (Poole et al. 2008, MNRAS, 383, 627) for summed exposures are:
Filter T_start(s) T_stop(s) Exp(s) Mag
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v 126195 133279 2563 20.51 +/- 0.19
v 271960 336155 3553 > 21.62
u 127505 134378 2329 20.03 +/- 0.12
u 272471 336626 3273 21.27 +/- 0.26
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The values quoted above are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.03 in the direction of the burst
(Schlegel et al. 1998).