{
  "bibcode": "2009GCN..9931....1N",
  "body": "K. Nishimoto, T. Sako(Nagoya Univ.) on behalf of the MOA Collaboration,\nM. Kurita on behalf of the IRSF Collabration, T. Yosikawa(Kyoto Univ.),\nT. Suenaga(Soken Univ.) report:\n\nWe searched for a NIR afterglow of GRB090904B (GCN9881, V. D'Elia et\nal.) starting from 17:6:57.7 UT on 2009 Sep 4 (15.71 hours after the burst)\nwith the SIRIUS on the IRSF 1.4m telescope at SAAO in South Africa.\nIn images of a 300sec exposure with J, H and Ks filter, we did not find\nany object except the reported star (GCN9882, Covino et al and GCN9892,\nNishimoto et al.) within the error circle of the Swift XRT source\nposition (GCN9887, J.P. Osborne et al.).\n\nQuick estimation of the limiting magnitude calibrated by using 2MASS\ncatalog:\n\nJ > 17.14\nH > 16.57\nK > 15.79",
  "circularId": 9931,
  "createdOn": 1253844032000,
  "email": "nishimo@stelab.nagoya-u.ac.jp",
  "subject": "GRB090904B : IRSF NIR upper limit",
  "submitter": "Kenta Nishimoto at Nagoya U/MOA-II  <nishimo@stelab.nagoya-u.ac.jp>",
  "eventId": "GRB 090904B"
}