[vsnet-grb-info 9409] GRB 100625A : IRSF/SIRIUS NIR upper limit

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  10889
SUBJECT: GRB 100625A : IRSF/SIRIUS NIR upper limit
DATE:    10/06/26 10:13:17 GMT
FROM:    Hiroyuki Naito at Nagoya U  <naito at stelab.nagoya-u.ac.jp>

H. Naito, T. Sako, D. Suzuki, S. Kobara and K. Omori (Nagoya Univ.) on  
behalf of the MOA Collaboration, T. Nagayama, M. Kurita (Nagoya Univ.)  
and N. Oi (The Graduate University for Advanced Studies/NAOJ) on  
behalf of the IRSF Collabration report:

We searched for a NIR afterglow of the short GRB 100625A (S. T.  
Holland et al., GCN 10884) starting from 03:07:07 UT on 2010 June 26  
with the SIRIUS on the IRSF 1.4m telescope at SAAO in South Africa. In  
images of a 20 min exposure with J, H and Ks filter, we did not find  
any object within the error circle of the Swift XRT source position  
(M. R. Goad et al., GCN 10886) and at the location of the Gemini  
source (A. J. Levan and N. R. Tanvir, GCN 10887).

A 3 sigma upper limits are the followings.

J > 19.37
H > 18.88
K > 18.02

This photometry was done by using the DoPhot and calibrated against  
the 2MASS cataloged stars.