[vsnet-grb-info 10110] GRB 110112A: Swift/UVOT upper limits

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  11560
SUBJECT: GRB 110112A: Swift/UVOT upper limits
DATE:    11/01/12 22:53:06 GMT
FROM:    Alice Breeveld at MSSL-UCL  <aab at mssl.ucl.ac.uk>

A. A. Breeveld (MSSL/UCL) and M. Stamatikos (OSU/NASA/GSFC) report on 
behalf
of the Swift/UVOT team:

Swift UVOT started observing the field of GRB 110112A  with the white 
filter 85s after the trigger (Stamatikos et al., GCN Circ. 11553).

No optical afterglow consistent with the TNT or XRT positions (Xin et 
al., CGN Circ. 11554 and Evans et al., GCN Circ. 11556) is detected in 
individual or merged UVOT exposures.
Preliminary 3-sigma upper limits using the UVOT photometric system
(Poole et al. 2008, MNRAS, 383, 627) are:

Filter      T_start   T_stop    Exp(s)      Mag (Upper limits)
---------------------------------------------------------------------------
white          85         235       147         >20.4
white      4499       6134        393        >21.3
v            4909        6544       393        >19.6
b            4294       5929        393        >20.3
u              287       5724        639        >20.2
uvw1     5319        5519       19.7        >18.8
uvm2     5079        6634       280         >18.9
uvw2     4705        6339        393        >19.2
----------------------------------------------------------------------------

The quoted upper limits have not been corrected for the expected
Galactic extinction along the line of sight corresponding to a
reddening of E_{B-V} = 0.06 mag (Schlegel et al., 1998, ApJS, 500, 525).