GCN Circular 7080
Subject
GRB 071112C: Swift/UVOT observations
Event
Date
2007-11-13T15:29:24Z (18 years ago)
From
Samantha Oates at MSSL <sro@mssl.ucl.ac.uk>
S.R. Oates (MSSL/UCL) and G. Stratta (ASDC) report on behalf of the
Swift-UVOT team:
The Swift/UVOT observed the burst GRB 071112C (Perri et al., GCN Circ.
7059) starting with the finding chart exposure in white, 92 seconds
after the BAT trigger. The afterglow is detected at the UVOT position
given in Perri et al. (GCN Circ. 7059) in white, v, b,
u and uvw1. The afterglow decreases with an estimated temporal slope in
the v filter of alpha =1.28.
The UVOT magnitudes and upper limits from single exposures or
co-added exposures are given below:
Filter Tstart(s) Tstop(s) Exp(s) Mag
----------------------------------------------
white 92 192 98 17.39 +/- 0.03
859 958 98 19.0 +/- 0.1
v 198 597 393 17.8 +/- 0.08
965 1364 393 19.3 +/- 0.3
b 679 689 10 18.3 +/- 0.4
1444 1626 39 19.7 +/- 0.5 (2.0-sigma)
u 654 674 19 17.8 +/- 0.3
1419 1601 39 19.3 +/- 0.5 (2.0-sigma)
uvw1 630 649 19 17.7 +/- 0.3
1394 1576 39 19.0 +/- 0.5 (2.3-sigma)
uvm2 605 1552 78 >20.5
uvw2 708 1663 55 >20.6
----------------------------------------------
The values quoted above are not corrected for the expected Galactic
extinction corresponding to a reddening of E_{B-V} = 0.119 mag in the
direction of the burst (Schlegel et al. 1998).
[GCN OPS NOTE(13nov07): Per author's request, in the first line "071121C"
was changed to "071112C"; and the first 'v' magnitude was changed from
"17.9 +/- 0.4" to "17.8 +/- 0.08".]