TITLE:   GCN CIRCULAR
NUMBER:  7207
SUBJECT: GRB 080123: Swift/UVOT refined analysis 
DATE:    08/01/23 16:09:43 GMT
FROM:    Antonino Cucchiara at PSU  <cucchiara@astro.psu.edu>

A. Cucchiara (PSU), T. N. Ukwatta (GSFC/GWU)
report on behalf of the Swift-UVOT team:

The Swift/UVOT observed the field of GRB080123 (trigger #301578)
starting 111 seconds after the BAT trigger (Ukwatta et al. 2008, GCN
Circ. 7203). We do not find any new source in any of the UVOT
single or coadded observations inside the XRT enhanced error
circle (Osborne et al., GCN Circ. 7204).
The XRT position is not covered by the V ,U and B
images.

The 3-sigma upper limits (in the UVOT photometric system,
Breeveld et al., GCN Circ. 6614) are listed:

Filter           Tstart   Tstop     Exp    Magnitude  
                   (s)     (s)      (s)   

white              112     211      100    >20.48
(finding chart)

uvw1               651    8022      577    >20.86
uvm2               626    7817      578    >20.70
uvw2               731   14026     1188    >21.56

The values quoted above are not corrected for the expected Galactic
extinction corresponding to a reddening of E_{B-V} = 0.03  mag in the
direction of the burst (Schlegel et al. 1998).