Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 17646

GRB 150323C: MITSuME Akeno Optical observation
2015-03-26T14:10:07Z (9 years ago)
Taketoshi Yoshii at Tokyo Tech <>
T.Fujiwara, Y. Saito, T. Yoshii, Y. Tachibana, H. Ohuchi, 
Y. Yano, S.Kurita, Y. Ono, Y. Yatsu, and N. Kawai (Tokyo Tech)
report on behalf of the MITSuME collaboration:

We observed the field of GRB 150323C (Amaral-Rogers et al. GCN Circular #17621) with the
optical three color (g', Rc, and Ic) CCD cameras attached to the MITSuME 50 cm
telescope of Akeno Observatory, Yamanashi, Japan.

The observation started at 2015-03-23 17:06:46 UT (85 sec after the burst).
We detected the previously reported optical afterglow (Xu et al. GCN Circular #17625) in the Rc band.

The measured magnitudes are listed below.

T0+[sec]  MID-UT  T-EXP[sec]    g'                Rc             Ic
85   17:09:24  270     > 19.9  > 19.6  > 18.5
1069   17:34:06  1200    > 20.9  20.3 $B!^(B 0.5  > 19.5
6681   19:18:53  2400    > 20.4  > 20.4  > 19.4
T0+ : Elapsed time after the burst
T-EXP: Total Exposure time
We used GSC2.3 catalog for flux calibration.
Looking for U.S. government information and services? Visit