GCN Circular 9596
Subject
GRB 090628: Swift/UVOT Upper Limits
Date
2009-06-29T22:59:56Z (15 years ago)
From
Mike Siegel at PSU/Swift MOC <siegel@astro.psu.edu>
M. H. Siegel (PSU) and V. Mangano (INAF-IASFPA) report on behalf
of the Swift/UVOT team.
The Swift/UVOT began observing the field of GRB 090628 2790s after
the BAT trigger (Mangano et al., GCN Circ. 9585). Data summed
from the first orbit does not reveal a source at the refined
position of the X-ray afterglow (Goad et al., GCN Circ.
9590).
The 3-sigma upper limits for the finding chart (fc) and
summed exposures are reported below:
FILTER T_start(s) T_stop Exposure Mag/3UL
=============================================================
white fc 2791 2941 147 > 20.26
white 3361 3560 196 > 20.72
v 3771 3971 196 > 19.23
b 3155 3355 196 > 20.16
b 4591 4672 79 > 19.64
u 2950 3149 196 > 19.63
u 4386 4586 196 > 19.82
uvw1 4181 4381 196 > 19.65
uvm2 3976 4176 196 > 19.33
uvw2 3566 3766 196 > 19.62
=================================================================
The above magnitudes are not corrected for the Galactic extinction
corresponding to a reddening of E_{B-V} = 0.05 (Schlegel et al.,
1998, ApJS, 500, 525). The photometry is on the UVOT photometric
system described in Poole et al. (2008, MNRAS, 383, 627).