GCN Circular 18642
Subject
GRB 151118A iTelescope observation
Date
2015-11-26T10:03:41Z (8 years ago)
From
Takanori Sakamoto at AGU <tsakamoto@phys.aoyama.ac.jp>
Y. Kitaoka, T. Sakamoto, A. Yoshida (AGU)
We observed the field of GRB 151118A detected by Swift (trigger #664078;
Amaral-Rogers et al., GCN Circ. 18611) with the iTelescope.Net (http://www.itelescope.net)
T7 (17" Plane Wave) telescope located at the AstroCamp Observatory (Nerpio, Spain).
20 images of 60 sec exposures were taken in the R filter starting from November 18 03:45:22 (UT)
about 38.8 minutes after the trigger and stopped on November 18 04:23:04 (UT).
We do not detect the optical afterglow both in the individual images and the stacked image
at the enhanced X-ray afterglow position (Evans et al., GCN Circ. 18614). The estimated
five sigma upper limit of the combined image (total exposure of 1200 sec) is ~18.3 using
the USNO-B1 catalog.