GCN Circular 27445
Subject
GRB 200324A: AROMA-N Optical Observation
Date
2020-03-26T06:44:11Z (4 years ago)
From
Takanori Sakamoto at AGU <tsakamoto@phys.aoyama.ac.jp>
M. Nakamura, T. Sakamoto (AGU)
We observed the field of GRB 200324A detected by Swift
(Dichiara et al., GCN Circ. 27428) with the 14-inch AGU Robotic
Optical Monitor for Astrophysical object - Narrow (AROMA-N)
located at the Sagamihara campus of Aoyama Gakuin University.
22 images of 60 sec, 120 sec, 180 sec and 300 sec exposures
were taken in the R filter starting from March 24 16:42:55 (UT)
about 228 seconds after the trigger and stopped on March 24 19:06:11 (UT).
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 3240 sec) is ~17.6 mag
using the USNO-B1 catalog.