{
  "bibcode": "2014GCN.16985....1K",
  "body": "D. Kopac (LJMU), J. Japelj (U. Ljubljana), C. Guidorzi (U. Ferrara), C. \nMundell (LJMU), S. Dichiara (U. Ferrara), on behalf of a large \ncollaboration report:\n\nUsing the Las Cumbres Observatory Global Telescope Network (LCOGTN) we \nobserved the field of Fermi GRB 141028A (Bissaldi et al., GCN 16969; \nRoberts, GCN 16971). Optical observations in r' and i' filters (5 x 120s \nsequences) were obtained with 1-m telescopes in Sutherland (South \nAfrica) and Cerro Tololo (Chile).\n\nAt the position of the MASTER telescope detection (Gorbovskoy et al., \nGCN 16972) we detect an un-catalogued source, consistent with GROND \n(Graham et al., 16977), UVOT (Siegel et al., GCN 16979) and RATIR \ndetections (Troja et al., GCN 16980). Our preliminary photometry yields:\n\nMid time from   Total Exp   Filter   Magnitude\ntrigger (hr)    (s)\n-------------------------------------------------\n10.2            600         r'       19.4 +- 0.1\n10.6            960         i'       19.3 +- 0.2\n\n14.9            600         i'       19.9 +- 0.2\n------------------------------------------------\n\nThe magnitudes are calibrated against nearby SDSS stars and are not \ncorrected for the Galactic foreground extinction. Further observations \nwith the LCOGTN are scheduled.",
  "circularId": 16985,
  "createdOn": 1414582760000,
  "email": "drejc.kopac@fmf.uni-lj.si",
  "subject": "GRB 141028A: LCOGTN observations",
  "submitter": "Drejc Kopac at Math Phys U,Slovenia  <drejc.kopac@fmf.uni-lj.si>",
  "eventId": "GRB 141028A"
}