{
  "bibcode": "2014GCN.15916....1X",
  "body": "D. Xu (DARK/NBI), H.-B. Niu, G.-J. Feng, T.-Z. Yang, A. Esamdin, L. Ma\n(XAO) report:\n\nWe observed the field of GRB 140304A (Evans et al., GCN 15915) using\nthe 1m telescope located in Nanshan, Xinjiang, China. Observations\nstarted at 13:43:26 UT on 2014-03-04 (i.e., 0.349 hr after the BAT\ntrigger) and a series of 120s and 500s R-band images were obtained.\n\nIn the first 120s R-band image, an optical source is clearly detected\nat the MASTER position (Gorbovskoy et al., GCN 15914), which is also\nconsistent with the Swift/XRT position. We thus think this is the\nafterglow of the burst, and it has decayed to R=19.4+/-0.2 mag,\ncalibrated with nearby SDSS stars.\n\nObservations are ongoing.",
  "circularId": 15916,
  "createdOn": 1393943179000,
  "email": "dong.dark@gmail.com",
  "subject": "GRB 140304A: Afterglow decay from Nanshan observations",
  "submitter": "Dong Xu at DARK/NBI  <dong.dark@gmail.com>",
  "eventId": "GRB 140304A"
}