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GCN Circular 9807

GRB 090814B: Swift/UVOT Upper Limits
2009-08-14T17:39:59Z (15 years ago)
Peter Curran at MSSL <>
P.A. Curran (MSSL-UCL) and W.H. Baumgartner (GSFC/UMBC) report on behalf
of the Swift/UVOT team:

Swift/UVOT observed the field of the INTEGRAL GRB 090814B (Beckmann et
al. GCN. Circ. 9795), gathering 950s of data in the from interval T0+9ks
to T0+14 ks.

No optical afterglow consistent with the Swift XRT position (Evans et
al., GCN 9803)  is detected in the UVOT exposures.  Preliminary 3-sigma
upper limits, using the UVOT photometric system (Poole et al. 2008,
MNRAS, 383, 627), are:

Filter   T_start(s)   T_stop(s)   Exp(s)   Mag
u        8044	      14166       506      >20.32
w2       8485	      8933        441      >20.30

The values quoted above are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 1.10 in the direction of the burst
(Schlegel et al. 1998).
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