GCN Circular 9407
Subject
GRB 090519: Swift/UVOT Upper Limits
Date
2009-05-20T03:27:00Z (15 years ago)
From
Stefan Immler at NASA/GSFC <stefan.m.immler@nasa.gov>
S. Immler (NASA/CRESST/GSFC) and M. Perri (ASDC) report on
behalf of the Swift/UVOT team:
The Swift/UVOT observed the field of GRB 090519 starting 106 s after
the BAT trigger (Perri et al., GCN Circ. 9400). No optical afterglow
is detected in the initial UVOT exposures at the enhanced position
of the X-ray afterglow (Goad et al., GCN Circ. 9405) or the position
of the NOT afterglow candidate (Thoene et al. GCN Circ. 9403).
Three-sigma upper limits using the UVOT photometric system
(Poole et al. 2008, MNRAS, 383, 627) are:
Filter T_start(s) T_stop(s) Exp(s) Mag
white 123 7430 862 >21.5
v 106 7841 597 >19.8
b 536 7224 568 >20.6
u 281 7019 617 >20.4
uvw1 662 8131 469 >20.3
uvm2 637 8046 587 >20.4
uvw2 588 7636 549 >20.6
The values quoted above are not corrected for the Galactic extinction due
to the reddening of E(B-V) = 0.04 in the direction of the burst
(Schlegel et al. 1998).