GCN Circular 10408
Subject
Swift/UVOT observations of GRB120212A
Event
Date
2010-02-13T15:32:09Z (16 years ago)
From
Massimiliano de Pasquale at MSSL-UCL <mdp@mssl.ucl.ac.uk>
M. De Pasquale (MSSL/UCL) and D. Grupe (PSU) report on behalf of the
Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 100212A
68 s after the BAT trigger (Grupe et al., GCN Circ. 10401) with
the finding chart in the white filter.
No optical afterglow is detected within the enhanced XRT error circle
position (Osborne et al., GCN Circ 10403) in the initial UVOT exposure
and in all other summed exposures at 3 sigma level. The optical source
detected by NOT (Malesani et al, GCN circ 10402) is not detected either
at 3 sigma level.
Preliminary 3-sigma upper limits using the UVOT photometric system
(Poole et al. 2008, MNRAS, 383, 627) for the first finding chart (FC)
exposure and subsequent exposures are:
Filter T_start(s) T_stop(s) Exp(s) Mag
white_FC 68 218 147 >20.6
u_FC 281 530 246 >19.8
white 68 1181 353 >21.2
v 610 1231 78 >18.7
b 536 1156 58 >19.5
u 281 1304 304 >19.8
w1 660 1280 78 >19.2
m2 635 1255 78 >19.3
w2 586 1206 78 >19.6
The values quoted above are not corrected for the strong Galactic
extinction due to the reddening of E(B-V) = 0.18 in the direction of the
burst (Schlegel et al. 1998).