GCN Circular 18282
Subject
GRB150911A MITSuME Okayama Ks-band upper-limit
Date
2015-09-11T20:40:22Z (10 years ago)
From
Kenshi Yanagisawa at OAO/NAOJ <yanagi@oao.nao.ac.jp>
Kenshi Yanagisawa, Daisuke Kuroda, Yasuhiro Shimizu, Hideyuki Izumiura
(OAO/NAOJ), Michitoshi Yoshida (Hiroshima-U), Kouji Ohta(Kyoto-U)
and Nobuyuki Kawai(Tokyo Tech.) report on behalf of the MITSuME
collaboration:
We observed the field of GRB150911A (Starling et al, GCN18280)
in Ks-band with a wide-field near infrared imager at Okayama
Astrophysical Observatory (Japan). The imager has effective
aperture of 0.91 m.
Observations started from 18:56 UT on 11th September, just 16 min
after the BAT trigger, to 19:10 UT. The total exposure of 6 min
was successfully obtained.
In our co-add image, we did not find any new point source within
the enhanced XRT error circle (Starling et al, GCN18280) down
to limiting magnitude of Ks=14.3 (Vega, S/N=10) . The photometric
calibration was made against 2MASS field stars.
T0+[s] MID-UT T-EXP[sec] Ks
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+1380 19:03 375 >14.3
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T0+ : Elapsed time after the burt [sec]
T-EXP: Total Exposure time [sec]