{
  "bibcode": "2012GCN.13031....1J",
  "body": "Jang, M., Im, M. (SNU), & Urata, Y. (NCU)\r\n\r\nWe observed GRB 120308A (Baumgartner et al., GCN 13017)\r\nin R, I-bands with a 1 m telescope at Mt. Lemmon, Arizona, U.S.\r\nThe obsevation started at 10:51:23 2012-03-08 UT, ~ 4.6 hours\r\nafter the burst alert.\r\n\r\nWe alternatively took 6 frames for each filter with the exposure time, 300s.\r\nWe found a optical afterglow candidate in the stacked I image\r\nwith a preliminary magnitude, I ~ 18.7 +/- 0.12 mag\r\nat mid-point time, 17274 sec after the burst alert\r\non the enhanced XRT position (Evans et al., GCN13023).\r\nHowever, no afterglow candidate was found in the stacked R image.\r\n\r\nWe thank the LOAO operator, J. Yoon for this observation.",
  "circularId": 13031,
  "createdOn": 1331393175000,
  "email": "rigel103@snu.ac.kr",
  "subject": "GRB 120308A : LOAO optical observation",
  "submitter": "Minsung Jang at Seoul National U  <rigel103@snu.ac.kr>",
  "eventId": "GRB 120308A"
}