GCN Circular 19115
Subject
GRB 160227A: AROMA-N Optical Observation
Event
Date
2016-02-29T13:07:42Z (11 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 160227A detected by Swift (trigger #676423;
Siegel et al., GCN Circ. 19098) with the 12-inch AGU Robotic Optical
Monitor for Astrophysical object - Narrow (AROMA-N) located at
the Sagamihara campus of Aoyama Gakuin University.
10 images of 60 sec exposures and 5 images of 180 sec exposures
were taken in the R filter starting from February 27 19:36:28 (UT)
about 260 seconds after the trigger and stopped on February 27 20:02:05 (UT).
Because the target was a low elevation (44.4 deg at the start time) and
the telescope was slightly out of focus, the quality of the obtained images
was not ideal. We do not detect the optical afterglow both in the individual
images and the stacked image. The estimated five sigma upper limit of
the combined image (total exposure of 1500 sec) is ~16.4 mag using
the USNO-B1 catalog.