GCN Circular 10133
Subject
GRB091026 : IRSF NIR upper limit
Date
2009-11-04T16:35:22Z (15 years ago)
From
Kenta Nishimoto at Nagoya U/MOA-II <nishimo@stelab.nagoya-u.ac.jp>
K. Nishimoto, T. Sako (Nagoya Univ.) on behalf of the MOA Collaboration,
M. Kurita, T. Nagayama (Nagoya Univ.) on behalf of the IRSF Collabration
report:
We searched for a NIR afterglow of GRB091026 (Markwardt et al., GCN
10081) starting from 18:43:32.3 UT on 2009 Oct 26 (5.5 hours after the
burst) with the SIRIUS on the IRSF 1.4m telescope at SAAO in South Africa.
In images of a 300sec exposure with J, H and Ks filter, we did not find
any object within the error circle of the Swift XRT source position
(Evans. et al., GCN 10084).
A 5 sigma upper limits are the followings.
J > 18.35
H > 17.39
K > 16.70
This photometry was done by using the DoPhot and calibrated against the
2MASS cataloged stars