{
  "bibcode": "2020GCN.27749....1H",
  "body": "Y.-D. Hu, E. Fernandez-Garcia, A. J. Castro-Tirado (IAA-CSIC), I. \nCarrasco and C. Perez del Pulgar (Univ. de Malaga), M. D.\nCaballero-Garcia (ASU-CAS, CZ) and R. Querel (NIWA), on behalf of a \nlarger collaboration,\nreport:\n\nThe 60cm BOOTES-3/YA robotic telescope at NIWA Lauder in Otago (New \nZealand) automatically responded to the Swift trigger of SGR Swift \nJ1818.0-1607 (Gronwall et al. GCNC 27746). The first image (clear \nfilter) were obatined starting at 15:03:57 UT(~ 29 s after trigger). In\nthe co-added image (79 exposures, 1s each), no source is found at the \nposition reported by Swift/XRT (Gronwall et al. GCNC 27746) down to 18.5 \nmag, which is in agreement with the non-detection reported by Lipunov et \nal. (GCNC 27747). Further observation is ongoing.\n\nWe thank the staff at NIWA for its excellent support.",
  "circularId": 27749,
  "createdOn": 1589713917000,
  "email": "youdong@iaa.es",
  "subject": "Swift J1818.0-1607: BOOTES-3/YA optical upper limit",
  "submitter": "Youdong HU at IAA-CSIC  <youdong@iaa.es>"
}