{
  "bibcode": "2015GCN.18266....1D",
  "body": "S. Dichiara, C. Guidorzi (U. Ferrara), S. Kobayashi (LJMU), A. Gomboc \n(U. Ljubljana), C. Mundell (U. Bath) on behalf of a larger collaboration \nreport:\n\nThe 2-m LCOGT Faulkes Telescope North in Hawaii began observing Swift \nGRB 150910A (Pagani et al. GCN 18264) on September 10, 09:33:19 UT (28 \nminutes after the burst trigger) with SDSS r and i filters. We clearly \ndetect the optical afterglow (Pagani et al. GCN 18264; Zheng et al. GCN \n18265) with the following magnitudes:\n\nMid Time      Exposure       Filter       Magnitude\n(min)           (s)\n-------------------------------------------------------\n29.0             60          r'           16.60 +- 0.02\n35.6             60          i'           16.42 +- 0.02\n-------------------------------------------------------\n\nCalibration is done against SDSS magnitudes of nearby stars.",
  "circularId": 18266,
  "createdOn": 1441883114000,
  "email": "guidorzi@fe.infn.it",
  "subject": "GRB 150910A: LCOGT FTN afterglow observations",
  "submitter": "Cristiano Guidorzi at Ferrara U,Italy  <guidorzi@fe.infn.it>",
  "eventId": "GRB 150910A"
}