GCN Circular 22303
Subject
GRB 180102A AROMA-N optical observation
Date
2018-01-06T00:57:23Z (6 years ago)
From
Takanori Sakamoto at AGU <tsakamoto@phys.aoyama.ac.jp>
Y. Kitaoka, T. Sakamoto (AGU)
We observed the field of GRB 180102A detected by Swift
(Page et al. GCN circ. 22292) with the 0.3 m AROMA-N telescope
located at Aoyama Gakuin University (Sagamihara, Japan).
10 images of 60 sec exposures were taken in the R filter starting
from January 2 on 15:52:26 (UT) about 3 minutes after the trigger
and stopped on 16:04:28 (UT). We do not detect the optical afterglow
both in the individual images and the stacked image at the location of
the X-ray afterglow (Beardmore et al. GCN circ. 22294). The estimated
five sigma upper limit is ~16.0 mag using the USNO-B1 catalog.