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GCN Circular 10220

Subject
GRB 091130B: Swift/UVOT Upper Limits
Date
2009-12-01T05:22:33Z (14 years ago)
From
Erik Hoversten at Swift/Penn State <hoversten@astro.psu.edu>
E. A. Hoversten (PSU) and J. L. Racusin (NASA/GSFC) report on behalf
of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 091130B
95s after the BAT trigger (Racusin et al., GCN 10214). We do not
detect any source at the enhanced Swift XRT position (Goad et al. GCN
10218). 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       95       230     132        > 20.20
white     4517      4717     196        > 20.97
v         3492      3692     196        > 19.38
b         4313      4512     196        > 20.31
u         4107      4307     196        > 19.91
uvw1      3903      4102     196        > 19.88
uvm2      3697      3897     196        > 19.76
uvw2      4723      4923     196        > 19.98

The quoted upper limits have not been corrected for the expected
Galactic extinction along the line of sight of E_(B-V) = 0.01 mag
(Schlegel et al. 1998). All photometry is on the UVOT photometric
system described in Poole et al. (2008, MNRAS, 383, 627).
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