{
  "bibcode": "2019GCN.24826....1H",
  "body": "Y.-D. Hu, X.-Y.Li, I. Carrasco, E. Fernandez-Garcia, A. Ayala and\nA. J. Castro-Tirado (IAA-CSIC), D. Hiriart and W. H. Lee (UNAM),\nS. Jeong and I. H. Park (SKKU) and M. D. Caballero-Garcia (ASU-CAS, CZ)\non behalf of a larger collaboration, report:\n\nThe 60cm BOOTES-5/JGT robotic telescope at Observatorio Astronomico\nNacional in San Pedro Martir (Mexico) automatically responded to the\nSwift trigger of GRB 190613B (D'Ai et al., GCNC 24807). The first image\n(1s exposure, clear-filter) was obtained at 10:48:04.16 UT (i.e. 62s\npost-burst). We detect the optical afterglow at the position reported\nby Swift (Beardmore et al. GCNC 24812, Marshall et al. GCNC 24817)\nwith R = 16.1. A sequence of images was obtained and the analysis is on\ngoing. The magnitude is calibrated against the USNO-B1 catalog and is\nnot corrected for Galactic extinction in the direction of the GRB.\n\nWe thank the staff at Observatorio Astronomico Nacional in San Pedro\nMartir for its excellent support.",
  "circularId": 24826,
  "createdOn": 1560488673000,
  "email": "ajct@iaa.es",
  "subject": "GRB 190613B: BOOTES-5/JGT early optical observations",
  "submitter": "Alberto J. Castro-Tirado at IAA-CSIC  <ajct@iaa.es>",
  "eventId": "GRB 190613B"
}