{
  "bibcode": "2008GCN..7410....1Y",
  "body": "M. Yoshida, K. Yanagisawa, Y. Shimizu, S. Nagayama, H. Toda (OAO,\nNAOJ) and N. Kawai (Tokyo Tech) report on behalf of the MITSuME\ncollaboration:\n\nWe detected the optical afterglow of GRB 080310 (Cummings, et al.,\nGCN 7382) in the error circle of the XRT position (Osborne et al.\nGCN 7394) with the 50cm MITSuME Telescope at Okayama Astrophysical\nObservatory on March 10 UT. Photometric calibration was done using\nUSNO-B1.0 catalog. The light curve shows a plateau at around 19:00 -\n20:00 UT (about 11 hours after the trigger).\nThe photometric results are summarized below.\n\nObservation date: 2008-03-10 UT\n\nmid-UT     exp-T         g'            Rc            Ic\n------------------------------------------------------------\n15:09:46   60min     20.0+-0.2     19.7+-0.3     19.1+-0.2\n16:24:47   60min     20.4+-0.2     20.2+-0.2     19.5+-0.2\n17:39:46   60min     20.6+-0.1     20.4+-0.2     19.8+-0.2\n18:54:44   60min     20.6+-0.2     20.5+-0.1     20.2+-0.3\n19:57:05   42min     20.6+-0.2     20.3+-0.1     20.0+-0.2\n------------------------------------------------------------",
  "circularId": 7410,
  "createdOn": 1205250927000,
  "email": "yoshida@oao.nao.ac.jp",
  "subject": "GRB080310: Optical observation by MITSuME telescope",
  "submitter": "Michitoshi Yoshida at Okayama Astrophysical Obs  <yoshida@oao.nao.ac.jp>",
  "eventId": "GRB 080310"
}