{
  "bibcode": "2016GCN.19358....1C",
  "body": "Changsu Choi and Myungshin Im (CEOU/SNU)\n\nWe observed the field of GRB 160425A (Krimm et al. GCN Circ. 19343) using\nLSGT(Lee Sang Gak Telescope; Im et al. 2015, JKAS, 48, 207 ). Images were\ntaken in R and I band starting on Apr. 26 15:14:22 UT(~15.24 hr after\nburst). We do not detect the optical afterglow candidate within the XRT\nenhanced error circle (Beardmore et al. GCN Circ. 19347) to the approximate\nlimiting magnitudes listed below.\n\nmid-time(UT)                    post-bust-hour    exposure(s)\nfilter(limiting mag)\n-----------------------------------------------------------------------------------------------------------\n\n2016-04-26 16:10:02        16.16722                2700                   R\n> 19.55\n2016-04-26 17:04:26        17.07396                2700\nI   > 19.22\n\n\nMagnitudes are calibrated using USNO-B1 stars in R1 and I.",
  "circularId": 19358,
  "createdOn": 1461830364000,
  "email": "changsu@astro.snu.ac.kr",
  "subject": "LSGT observation of GRB 160425A",
  "submitter": "Changsu Choi at Seoul Nat U  <changsu@astro.snu.ac.kr>",
  "eventId": "GRB 160425A"
}