GCN Circular 25906
Subject
GRB 191001B: MITSuME Akeno optical upper limits
Date
2019-10-01T18:52:08Z (6 years ago)
From
Katsuhiro L. Murata at Nagoya U <murata@u.phys.nagoya-u.ac.jp>
K. L. Murata, R. Adachi, M. Oeda, K.Shiraishi, K. Iida, M. Niwano,
F. Ogawa, R. Hosokawa, S. Toma, Y. Yatsu, and N. Kawai (TokyoTech)
report on behalf of the MITSuME collaboration:
We searched for the optical counterpart of GRB 191001B (E. Troja et
al., GCN Circular #25902) 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 on 17:22:09 UT. We did not find any new point
sources within the BAT on-board calculated error circle in all three bands.
We obtained the following 5-sigma limits for the magnitudes.
T0+[sec] MID-UT T-EXP[sec] 5-sigma limits
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~169 ~17:37 1680 g'>18.8, Rc>18.8, Ic>18.6
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T0+ : Elapsed time after the burst
T-EXP: Total Exposure time
We used GSC2.3 catalog for flux calibration.
The magnitudes are expressed in the AB system.