GCN Circular 9652
Subject
GRB 090709A: Swift UVOT upper limits
Event
Date
2009-07-10T20:34:40Z (17 years ago)
From
Erik Hoversten at Swift/Penn State <hoversten@astro.psu.edu>
T. A. Pritchard (PSU), E. A. Hoversten (PSU) and D. C. Morris (PSU)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began observing the field of GRB 090709A, 77 seconds
after the BAT trigger (Morris et al., GCN 9625). We do not detect any
source at the Swift enhanced XRT position (Osborne et al., GCN 9636).
The 3-sigma upper limits in each filter are:
Filter T_start(s) T_stop(s) Exp(s) Mag (3-sigma upper limit)
-------------------------------------------------------------
white(FC) 77 227 150 > 21.03
v 4697 4897 200 > 19.59
b 4081 4281 200 > 20.01
u 290 471 181 > 20.09
uvw1 5107 5307 200 > 19.83
uvm2 4902 5102 200 > 19.63
uvw2 4492 4692 200 > 19.85
-------------------------------------------------------------
The quoted upper limits have not been corrected for the expected
Galactic extinction along the line of sight of E_(B-V) = 0.09 mag.
All photometry is on the UVOT photometric system described in Poole et
al. (2008, MNRAS, 383, 627).