Skip to main content
New Swift-BAT/GUANO and IceCube Notice Types Available! See news and announcements

GCN Circular 24016

GRB 190326A: MITSuME Okayama optical upper limits
2019-03-27T06:52:18Z (5 years ago)
Masafumi Niwano at Tokyo Institute of Tech <>
M. Niwano,�� K. L. Murata, R. Itoh, Y. Tachibana,
K. Morita, K. Iida, K. Shiraishi, R. Adachi, M. Oeda,�� Y. Yatsu,
and N. Kawai (Tokyo Tech) report on behalf of the MITSuME collaboration

We searched for the optical counterpart of
GRB 190326A (M. H. Siegel et al., GCN #24009)
with optical three color (g', Rc, and Ic) cameras attached to the 
MITSuME 50 cm

reflector in the Okayama��Astrophysical Observatory, Japan.

The observation started at 19:01:19 UT which corresponds to 41151 
sec��since the trigger.
We did not find any new point source within the Swift BAT error circle
(M. H. Siegel et al., GCN #24009) in all three bands.

The obtained 5 sigma upper limits of the optical counterpart are 
summarize below:

T0+[sec]������ MID-UT���������� T-EXP[sec]������ g'������������ Rc�������������� Ic

41151�� 19:33:27�� 600���� >16.8�������� >16.8�������� >16.2

T0+ : Elapsed time after the burst
T-EXP: Total Exposure time
We used UCAC-4 catalog for flux calibration.
Looking for U.S. government information and services? Visit