GCN Circular 4824
Subject
GRB 060223a: Swift/UVOT refined analysis
Event
Date
2006-02-24T02:02:39Z (20 years ago)
From
Alexander Blustin at MSSL-UCL <ajb@mssl.ucl.ac.uk>
A. J. Blustin (UCL-MSSL), J. R. Cummings (NASA/ORAU) report on
behalf of the Swift/UVOT team:
The Swift/UVOT began observing the field of GRB 060223a 72 s
after the BAT trigger, detecting a red afterglow (Cummings
et al., GCN 4813; Marshall et al., GCN 4814). Analysis of a more
complete dataset shows that V was the only band to yield a
significant detection of the afterglow, as to be expected given
the redshift of the burst (z=4.41; Berger et al., GCN 4815).
The magnitudes and 3-sigma upper limits from all filters are
listed below.
Filter T_range (MET) Exp (s) Mag/3sigUL
V 72-81 9 17.7 +/- 0.4
V 85-285 200 17.8 +/- 0.1
V 545-1034 239 19.4 +/- 0.3
V 1294-11097 512 >19.6
B 292-492 200 >20.2
B 641-7249 731 >20.9
U 616-7044 532 >20.4
UVW1 593-6839 355 >20.4
UVM2 569-6634 355 >20.9
UVW2 521-10892 580 >21.1
These are uncorrected for the estimated Galactic extinction
corresponding to E(B-V) = 0.12