{
  "bibcode": "2017GCN.21120....1D",
  "body": "A. de Ugarte Postigo (IAA-CSIC, DARK/NBI), D. Xu (NAOC), \nD. Malesani (DARK/NBI), K.E. Heintz (DARK/NBI), \nD. Gandolfi (Univ. Turin), and J. Telting (NOT) report on behalf \nof a larger collaboration,\n\nWe have observed the field of GRB 170519A (Ukwatta et al., \nGCN 21106) with the 2.5m Nordic Optical Telescope at La \nPalma (Spain). The observations consisted of 3x120s in V-band \nand 5x120s in Sloan i-band. The GRB afterglow is well detected in \nall the individual frames. On an image starting at 21:51 UT (16.68 hr \nafter the burst) we detect the optical afterglow at i(AB) = 19.7 mag, \nas compared to SDSS field stars. This confirms the t^(-0.8) decay \nreported by Butler et al. (GCN 21109) and by Zheng et al. \n(GCN 21115) that started 900 s after the GRB trigger.",
  "circularId": 21120,
  "createdOn": 1495238025000,
  "email": "deugarte@iaa.es",
  "subject": "GRB 170519A: NOT optical observations",
  "submitter": "Antonio de Ugarte Postigo at IAA-CSIC  <deugarte@iaa.es>",
  "eventId": "GRB 170519A"
}