GCN Circular 17425
Subject
GRB 150203A iTelescope observation
Event
Date
2015-02-07T11:36:49Z (12 years ago)
From
Takanori Sakamoto at AGU <tsakamoto@phys.aoyama.ac.jp>
D. Kawamura, T. Sakamoto, A. Yoshida (AGU)
We observed the field of GRB 150203A detected by Swift (trigger #629578;
Ukwatta et al., GCN Circ. 17377) with the iTelescope.Net (http://www.itelescope.net)
T11 (0.50 m Plane Wave) telescope located at the New Mexico Skies Observatory (NM, USA).
20 images of 60 sec exposures were taken in the R filter starting from February 3
4:22:11 (UT) about 13.3 minutes after the trigger and stopped on February 3 4:47:29 (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. 17378).
The estimated five sigma upper limit of the combined image (total exposure of 1200 sec)
is ~18.9 using the USNO-B1 catalog.