{
  "bibcode": "2014GCN.16138....1X",
  "body": "D. Xu (DARK/NBI), T. Kruehler (ESO), N. Tanvir (U. Leicester), F.\nTaddia, C. Fremling (Stockholm U.) report on behalf of a larger\ncollaboration:\n\nWe observed the optical afterglow of GRB 140419A (Marshall et al., GCN\n16118; Zheng et al., GCN 16119; Kuin et al., GCN 16123) using the 2.5\nNordic Optical Telescope equipped with ALFOSC. We obtained 4x300s,\n3x300s, 4x200s frames in the SDSS g-, r-, and i-filters, respectively,\nwith floating clouds, starting at 23:10 UT on 2014-04-20 .\n\nPhotometry is calibrated with nearby SDSS stars, and results are as follows:\n\nTmid-T0(hr)        Mag       MagErr\n   43.24              >22.5\n   43.54              23.16      0.15\n   43.86              >20.3\n\nCompared with previous measurements (e.g., from RATIR and KAIT), the\nafterglow may be decaying more quickly.",
  "circularId": 16138,
  "createdOn": 1398103197000,
  "email": "dong.dark@gmail.com",
  "subject": "GRB140419A: NOT optical observations",
  "submitter": "Dong Xu at DARK/NBI  <dong.dark@gmail.com>",
  "eventId": "GRB 140419A"
}