TITLE:   GCN CIRCULAR
NUMBER:  10756
SUBJECT: GRB 100513A: Swift/UVOT upper limits
DATE:    10/05/13 16:01:19 GMT
FROM:    Erik Hoversten at Swift/Penn State  <hoversten@astro.psu.edu>

E. A. Hoversten (PSU) and W. H. Baumgartner (GSFC/UMBC) report
on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB
100513A 130s after the BAT trigger (Baumgartner et al., GCN 10746).
We do not detect any source at the enhanced Swift XRT position
(Evans et al., GCN 10751) nor at the position of the PAIRITEL NIR
detection (Morgan et al., GCN 10747).  UVOT magnitude 3-sigma
upper limits are reported in the following table:

Filter  T_start  T_stop  Exp(s)  Mag (3-sigma upper limit)
-------------------------------------------------------------
white     130     1707    411      > 21.29
v         618     1757    136      > 19.02
b         544     1683    116      > 19.89
u         289     1658    343      > 20.22
uvw1      667     1462     97      > 19.33
uvm2     5000     5200    196      > 19.59
uvw2     6026     6226    196      > 20.03

The quoted upper limits have not been corrected for the expected
Galactic extinction along the line of sight of E_(B-V) = 0.05 mag
(Schlegel et al. 1998). All photometry is on the UVOT photometric
system described in Poole et al. (2008, MNRAS, 383, 627).