{
  "bibcode": "2010GCN.10440....1K",
  "body": "D. Kuroda, K. Yanagisawa, Y. Shimizu, H. Toda (OAO, NAOJ), H. Nakajima,\nY.Yatsu, Y.A.Mori, A.Endo, T. Shimokawabe, and N. Kawai(Tokyo Tech),\nS. Nagayama (NAOJ), M. Yoshida (Hiroshima) and K. Ohta (Kyoto)\nreport on behalf of the MITSuME collaboration:\n\nWe observed the field of GRB 100219A (Rowlinson et al. GCN 10430)\nwith the optical three color (g', Rc and Ic) CCD camera attached\nto the MITSuME 50cm telescope of Akeno Observatory and Okayama\nAstrophysical Observatory. We found the afterglow at the XRT\nposition (Holland et al. GCN 10432, Rowlinson et al. GCN 10435\nand Evans et al. GCN 10437) in Rc and Ic band.\n\nThe coordinates of the object are:\nRA(J2000.0)   10:16:48.50 (+- 0.5 arcsec)\nDEC(J2000.0) -12:34:00.6  (+- 0.3 arcsec)\n\nBut we could not detect the optical afterglow previously\nreported by Holland and Rowlinson (GCN 10436)\n\nPhotometric results and three sigma upper limits of the OT are\nlisted below. We used GSC2.3 catalog for flux calibration.\n\nAkeno Observatory:\nThe observation started on 2010-02-19 15:17:30 UT (104s after the\ntrigger).\nPDAY     MID-UT    T-EXP    g'      Rc       Ic\n-----------------------------------------------------\n0.00471  15:22:34   540.0        19.8+-0.3 18.5+-0.3\n----------------------------------------------------\n\nOkayama Astrophysical Observatory:\nThe observation started on 2010-02-19 15:20:08 UT (262 sec after\nthe trigger).\nPDAY     MID-UT    T-EXP    g'      Rc       Ic\n-----------------------------------------------------\n0.00675  15:25:30   540.0 >19.1   >19.0    17.8+-0.2\n0.01428  15:36:21   540.0 >19.1   >19.1    17.5+-0.1\n0.02177  15:47:07   540.0 >19.1  18.4+-0.2 18.1+-0.3\n0.06589  16:50:40  3000.0 >19.4   >19.7    18.9+-0.3\n-----------------------------------------------------",
  "circularId": 10440,
  "createdOn": 1266637414000,
  "email": "dikuroda@oao.nao.ac.jp",
  "subject": "GRB100219A Akeno and Okayama MITSuME Optical Observation",
  "submitter": "Daisuke Kuroda at OAO/NAOJ  <dikuroda@oao.nao.ac.jp>",
  "eventId": "GRB 100219A"
}