GRBlog: GCN 9407

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GRB 090519: Swift/UVOT Upper Limits	Immler & Perri
	GCN 9407

SOURCE: GCN
TITLE: GCN CIRCULAR
NUMBER: 9407
SUBJECT: GRB 090519: Swift/UVOT Upper Limits
DATE: 09/05/20 03:27:00 GMT
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 9400). No optical afterglow is detected in the initial UVOT exposures at the enhanced position of the X-ray afterglow (Goad et al., GCN 9405) or the position of the NOT afterglow candidate (Thoene et al. GCN 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).

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