GCN Circular 8799
Subject
GRB 090111: Swift UVOT Upper Limits
Event
Date
2009-01-12T19:11:09Z (17 years ago)
From
Erik Hoversten at Swift/Penn State <hoversten@astro.psu.edu>
E. A. Hoversten (PSU) and T. Sakamoto (NASA/UMBC) report on behalf of
the Swift UVOT team:
The Swift/UVOT began settled observations of the field of
GRB 090111 86s after the BAT trigger (Godet et al., GCN 8795).
We do not detect any source at the enhanced Swift XRT position (Evans
et al. GCN 8796). 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 86 235 146 > 20.25
WHITE 86 1545 391 > 20.78
v 627 1768 136 > 18.47
b 553 1866 136 > 19.37
u 298 547 245 > 19.56
u 298 1841 608 > 20.03
uvw1 676 1817 136 > 19.22
uvw2 603 1743 136 > 19.52
The quoted upper limits have not been corrected for the expected
Galactic extinction along the line of sight of E_(B-V) = 0.16 mag.
All photometry is on the UVOT photometric system described in Poole et
al. (2008, MNRAS, 383, 627).