GCN Circular 4079
Subject
GRB051008 - Swift UVOT upper limits
Date
2005-10-09T19:19:43Z (19 years ago)
From
Alice Breeveld at MSSL-UCL <aad@mssl.ucl.ac.uk>
A. Breeveld (MSSL-UCL), F. Marshall (GSFC), A. Blustin (MSSL-UCL), M.
Chester (PSU), L. Angelini (GSFC-JHU)
The UVOT began observing GRB051008 3028 seconds after the BAT trigger
(GCN 4069, Marshall et al.) at 17:23:49. No afterglow is detected at
the position of the XRT source (GCN 4073, Perri et al.). The star
suggested in GCN 4070 (Roming et al.) as a candidate afterglow for GRB
051008 is now shown not to be associated with the GRB. It is located
far outside the XRT error box and is not variable in the UVOT
exposures.
Upper limits for a UVOT detection at the XRT position are given below:
Filter 5sig UL (mags) T_range(s) Exp(s)
----------------------------------------------------------------------
v 18.2 3028 3227 200
v 18.1 3652 3751 100
v 20.0 4970 39669 3984
u 19.1 3442 4056 200
u 20.4 15631 34555 2461
w1 19.2 3338 3953 197
w1 20.6 10753 33885 2865
m2 19.6 3233 3852 196
m2 21.3 9847 40339 3361
w2 19.2 3548 3647 100
w2 21.4 4064 38762 3277
where T_range is the time range post-trigger over which the summed
images were accumulated and Exp is the total exposure time of the
summed image. The magnitude upper limits are not corrected for
extinction.
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