{
  "bibcode": "2010GCN.10398....1I",
  "body": "M. Im, Y. Jeon, W. Park (CEOU/Seoul National Univ),\n  H.-I. Sung (KASI) and Y. Urata (NCU) on behalf of EAFON team.\n\n   We observed the GRB100205A (GCN 10361 Racusin et al.)\n  with J and K-band using KASINICS instrument on the 1.8m telescope\n  at the Bohyunsan Optical Astronomy Observatory (BOAO), Korea,\n  starting from 2010-02-05, 17:28:13 UT. We also observed the GRB\n  with z and Y filters using the LOAO 1-m telescope,\n  starting from 2010-02-05, 10:37:51 UT.\n\n   We do not detect the afterglow at the reported position\n  (GCN 10361.; GCN 10366, Tanvir et al.) in any of the bands\n  with the upper limits summarized below.\n   Our non-detection in K suggests that the afterglow candidate\n  faded since the report of the K-band detection (GCN 10366;\n  GCN 10374 Cucchiara et al.), confirming that it is\n  an afterglow. The values for J and K-bands are preliminary,\n  and we are refining the photometry. The data analysis of\n  the 2nd night follow-up observation (z,Y) is on-going.\n\n        Filter            z      Y      J       K\n   -------------------------------------------------\n   3-sigma limit (AB)   22.3   20.8   22.3    22.5\n   mid-point(UT,hh:mm)  12:11  11:07  17:43   19:01\n\n   We thank the LOAO operator, J. Yoon for his assistance for this\n   observation.",
  "circularId": 10398,
  "createdOn": 1265727050000,
  "email": "mim@astro.snu.ac.kr",
  "subject": "GRB 100205A: BOAO/LOAO zYJK observation",
  "submitter": "Myungshin Im at Seoul Nat U  <mim@astro.snu.ac.kr>",
  "eventId": "GRB 100205A"
}