GCN Circular 10855
Subject
GRB 100614A: Swift/UVOT Upper Limits
Event
Date
2010-06-15T19:20:53Z (15 years ago)
From
Stephen Holland at USRA/NASA/GSFC/SSC <Stephen.T.Holland@nasa.gov>
S. T. Holland (CRESST/GSFC/USRA) and
G. Stratta (ASDC)
report on the behalf of the Swift UVOT team:
The Swift/UVOT observed the field of GRB 100614A starting 123 s
after the BAT trigger (Stratta, et al., 2010, GCN Circ. 10837).
Settled observations started at 139 s. No white observations were
taken due to the presence of the bright A0 star HD 159607 (V = 7.4)
located 11.5 arcmin from the XRT source. We do not find any new
source, relative to the DSS, USNO-B1.0, or 2MASS at the position of
the XRT afterglow (Osborne, et al. 2010, GCN Circ. 10849).
Preliminary 3-sigma upper limits for detecting a source in the u-band
finding chart, and in the co-added images, using a 2.5 arcsecond
radius circular aperture, are
Filter T_start T_stop Exp(s) Mag
--------------------------------------------
u (fc) 139 339 246 >21.0
v 445 12,065 1218 >21.4
b 395 7165 549 >21.8
u 139 6960 897 >21.7
uvw1 494 13,145 675 >21.2
uvm2 770 12,970 1102 >21.4
uvw2 421 7365 484 >21.1
--------------------------------------------
The quoted upper limits have not been corrected for the expected
Galactic extinction along the line of sight corresponding to a
reddening of E_{B-V} = 0.03 mag (Schlegel, et al., 1998, ApJS, 500,
525). All photometry is on the UVOT photometry system described in
Poole et al. (2008, MNRAS, 383, 627).