GCN Circular 10856
Subject
GRB 100615A: Swift/UVOT Upper Limits
Event
Date
2010-06-15T19:21:44Z (15 years ago)
From
Stephen Holland at USRA/NASA/GSFC/SSC <Stephen.T.Holland@nasa.gov>
S. T. Holland (CRESST/GSFC/USRA) and
V. D'Elia (ASDC)
report on the behalf of the Swift UVOT team:
The Swift/UVOT observed the field of GRB 100615A starting 53 s
after the BAT trigger (D'Elia, et al., 2010, GCN Circ. 10841).
Settled observations started at 72 s. We do not find any new source,
relative to the DSS, USNO-B1.0, or 2MASS at the position of the XRT
afterglow (Goad, et al. 2010, GCN Circ. 10848). Preliminary 3-sigma
upper limits for detecting a source in the finding charts, and in the
co-added images, using a 2.5 arcsecond radius circular aperture, are
Filter T_start T_stop Exp(s) Mag
--------------------------------------------
white (fc) 72 222 147 >21.5
864 1014 147 >21.5
u (fc) 284 534 246 >20.7
v 613 7037 510 >20.6
b 539 6422 490 >21.1
u 284 6216 539 >21.1
uvw1 663 7436 499 >21.1
uvm2 813 7242 413 >20.7
uvw2 589 6832 471 >21.1
white 72 6627 785 >22.2
--------------------------------------------
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} = 0.05 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).