TITLE:   GCN CIRCULAR
NUMBER:  5973
SUBJECT: GRB061222A Swift/UVOT: Upper Limits
DATE:    06/12/22 18:11:23 GMT
FROM:    Samantha Oates at MSSL  <sro@mssl.ucl.ac.uk>

S.R Oates(UCL-MSSL), D. Grupe(PSU), S.B.Pandey(UCL-MSSL)
report on the behalf of the Swift UVOT team:

The Swift/UVOT began observing the field of GRB 061222A
92 seconds after the BAT trigger (Grupe et al., GCN Circ.5954).
No optical afterglow candidate is detected in the XRT error circle
within the first V and White exposures or in later coadded images.

The 3 sigma upper limits for each UVOT filter are given
below:

Filter        Tstart    Tend     Exposure    3sigUL
-------------------------------------------------
V finding       215     615       393        19.6
White finding   111     209       97         20.0

V               745      24842    5310       20.4
B               693      24112    2713       20.8
U               669      1591     78         19.4
w1              645      1711     83         19.2
m2              621      1701     97         19.3
w2              721      1653     58         19.3
White           110      1629     322        20.6
-------------------------------------------------

The values quoted above are not corrected for the expected Galactic
extinction of E_{B-V} = 0.099 mag (Schlegel et al. 1998).