GCN Circular 13564
Subject
GRB 120802A: GRT Optical Observation
Event
Date
2012-08-02T22:24:03Z (14 years ago)
From
Takanori Sakamoto at NASA/GSFC <takanori@milkyway.gsfc.nasa.gov>
T. Sakamoto (UMBC/GSFC), D. Donato (ORAU/GSFC), N. Gehrels (GSFC),
T. Okajima (GSFC), Y. Urata (NCU)
We observed the field of GRB 120802A detected by Swift
(trigger #529486; Holland et al., GCN Circ. 13555) with the 14-inch
Goddard Robotic Telescope (GRT) located at the Goddard Geophysical
and Astronomical Observatory (http://cddisa.gsfc.nasa.gov/ggao/).
30 images of 60 sec exposures were taken in the R filter starting
from August 2 08:37:05 (UT) about 36 minues after the trigger and
stopped on August 2 09:08:49 (UT). We do not detect the optical
afterglow both in the individual images and the stacked image, which only
combined 27 good quality images, inside the enhanced XRT position
(Evans et al., GCN #13558). The estimated five sigma upper limit of
the combined image (total exposure of 1620 sec) is ~17.2 mag using
the USNO-B1 catalog.