GCN Circular 9369
Subject
GRB 090515: Swift/UVOT Observations
Date
2009-05-15T20:10:18Z (15 years ago)
From
Michael Siegal at Swift/PSU <siegel@astro.psu.edu>
M. H. Siegel (PSU) and A. P. Beardmore (Leicester) report on behalf
of the Swift/UVOT team.
The Swift/UVOT began observing the field of GRB 090515 67s after
the BAT trigger (Beardmore et al., GCN Circ. 9356). Data summed
from the first and second orbits does not reveal a source at the
refined position of the X-ray afterglow (Osborne et al., GCN Circ.
9367).
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 67 216 146 > 20.35
white 67 2389 488 > 21.24
white 5901 13321 401 > 21.12
v 608 2439 213 > 19.27
v 6311 7947 393 > 19.62
b 534 2365 194 > 20.15
b 5696 13291 688 > 20.70
u 278 528 245 > 19.83
u 6926 12386 491 > 20.40
uvw1 657 2488 214 > 19.83
uvw1 6722 8290 327 > 20.01
uvm2 805 2291 97 > 19.07
uvm2 6516 8151 393 > 20.16
uvw2 583 2414 213 > 20.11
uvw2 6107 7742 393 > 20.48
=================================================================
The above magnitudes are not corrected for the Galactic extinction
corresponding to a reddening of E_{B-V} = 0.02 (Schlegel et al.,
1998, ApJS, 500, 525). The photometry is on the UVOT photometric
system described in Poole et al. (2008, MNRAS, 383, 627).