GCN Circular 10302
Subject
GRB 091230: Swift/UVOT Observations
Event
Date
2009-12-31T18:50:34Z (17 years ago)
From
Mike Siegel at PSU/Swift MOC <siegel@astro.psu.edu>
M. H. Siegel (PSU) and H. A. Krimm (CRESST/GSFC/USRA)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB
091230 32291 s after the Integral detection (Gotz et al., GCN
Circ. 10298). We do not detect the afterglow reported by GROND
(Filgas et al., GCN Circ. 10299) and Swift-XRT (Beardmore et al.,
GCN Cic. 10300).
Preliminary 3-sigma upper limits are:
FILTER T_start(s) T_stop Exposure Mag/3UL
=============================================================
white 32291 42824 3898 >22.2
The above magnitudes are not corrected for the Galactic extinction
corresponding to a reddening of E_{B-V} = 0.36 (Schlegel et al.,
1998, ApJS, 500, 525). The photometry is on the UVOT photometric
system described in Poole et al. (2008, MNRAS, 383, 627).