[vsnet-grb-info 9075] GRB 100331B: Swift/UVOT Upper Limits
GCN Circulars
gcncirc at capella.gsfc.nasa.gov
Fri Apr 2 11:12:27 JST 2010
TITLE: GCN CIRCULAR
NUMBER: 10563
SUBJECT: GRB 100331B: Swift/UVOT Upper Limits
DATE: 10/04/02 02:12:21 GMT
FROM: Michele Stark at PSU/Swift <stark at astro.psu.edu>
M. A. Stark (PSU), G. Stratta (ASDC), E. A. Hoversten (PSU), and
M. H. Siegel (PSU) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of the
SuperAGILE detected GRB 100331B about 17.5 hours after the SuperAGILE
detection (Del Monte et al., GCN #10560). No optical afterglow
consistent with the XRT enhanced position reported by D'Elia & Stratta
(GCN #10562) is detected in the initial UVOT exposure. Observations
were conducted using only the UVOT white filter, with a preliminary
3-sigma upper limit using the UVOT photometric system (Poole et
al. 2008, MNRAS, 383, 627) for the initial exposure of:
Filter T_start(s) T_stop(s) Exp(s) Mag
---------------------------------------------------------------
white 63371 64517 650 >21.21
The value quoted above is not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.12 in the direction of the burst
(Schlegel et al. 1998).
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