[vsnet-grb-info 3323] GRB 060522: Swift/UVOT Observations of the Optical Afterglow

[GCN Circulars]

TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  5158
SUBJECT: GRB 060522: Swift/UVOT Observations of the Optical Afterglow
DATE:    06/05/23 16:26:10 GMT
FROM:    Stephen Holland at USRA/NASA/GSFC/SSC  <sholland at milkyway.gsfc.nasa.gov>

GRB 060522: Swift/UVOT Observations of the Optical Afterglow

S. T. Holland (NASA/GSFC & USRA) reports on behalf of the Swift/UVOT
team:

       The Swift UVOT began observing GRB 060522 (trigger #211117,
Fox et al., GCN Circular 5150) 129 seconds after the BAT trigger.
We detect the UVOT optical transient reported in the above Circular
in the White filter.  The J2000 coordinates of the afterglow are

  RA =  21:31:44.85
Dec = +02:31:44.9

with an uncertainty of +/- 0.6 arcseconds (90% containment).

Magnitudes and 3-sigma upper limits are reported below.

           Midpoint   Coadded
Filter     Time     Exposure    Mag   Err
            (sec)      (sec)
White        198       100     19.65 0.21
White        749         9    >18.4         3-sigma upper limit
White        927        98    >20.3         3-sigma upper limit
White       6266       197    >20.9         3-sigma upper limit
White     74,157      4766    >22.1         3-sigma upper limit
V            452       400    >20.1         3-sigma upper limit
V            792        20    >17.6         3-sigma upper limit
V           1100       231    >19.5         3-sigma upper limit
V         18,351      1967    >20.8         3-sigma upper limit
B           3447       206    >20.7         3-sigma upper limit
U         18,315      1451    >21.0         3-sigma upper limit
UVW1      17,925      2904    >22.0         3-sigma upper limit
UVM2      17,533      1944    >21.9         3-sigma upper limit
UVW2      23,194      2001    >21.7         3-sigma upper limit

      These data are consistent with the burst having a redshift of
z = 5.11 (Cenko et al., 2006, GCN Circular 5155).  No correction
has been made for the Galactic reddening of E(B-V) = 0.05 mag
(Schlegel et al. 1998) along the line of sight to GRB 060522.