GCN Circular 5608
Subject
GRB060923C: AROMA optical obsevation
Event
Date
2006-09-25T12:45:25Z (19 years ago)
From
Atsumasa Yoshida at Aoyama Gakuin U <grbalert-ylab@phys.aoyama.ac.jp>
T.Uehara, I.Takahashi, K.Yoshida, A.Kobayashi,
D.Oyamada, Y.E.Nakagawa, S.Sugita, K.Yamaoka,
A.Yoshida (AGU) report:
We have observed the feild of GRB060923C (Stamatikos et al. GCN 5591)
from 13:35:46 (UT) with 0.3m AROMA robotic telescope with R-band filter
at Aoyama Gakuin University.
Although the weather condition was not good, we have taken 60 frames of
image with 20s exposure each. The photometric calibration was made
by first 5 and every 20 frames by comparing with USNO A2.0 stars
in the same field. No new source was found. The 3 sigma
limiting magnitude of each combined image is as below.
number mean time since limiting magnitude
of frames time (UT) GRB (s) in R (3 sigma)
========================================================================
5 13:36:39 217 15.4
20 13:40:20 436 15.8
20 13:54:06 1264 16.8
20 14:10:26 2244 17.5