{
  "bibcode": "2019GCN.26013....1J",
  "body": "Martin Jelinek and Jan Strobl (ASU CAS Ondrejov, CZ)\nreport:\n\nWe observed GRB 191016A (Gropp et al. GCNC 26008) with the 50 cm robotic\ntelescope (D50) of Ondrejov observatory in the Czech Republic, obtaining a\nseries of 120s images starting at 17:55UT, i.e. 13.6h post trigger.\n\nWe do not detect the optical afterglow (Watson, GCNC 26010; Zheng et al.,\nGCNC 26011 and others) in a combined 60x120s I-band image with exposure\nmean time 14.6h after the GRB. A rough conservative detection limit of the\nimage is I(Vega) > 19.5; as mentioned before by Zheng et al., the proximity\nof Moon makes any photometric measurement difficult.",
  "circularId": 26013,
  "createdOn": 1571262929000,
  "email": "martin.jelinek@asu.cas.cz",
  "subject": "GRB 191016A: Optical limit by Ondrejov D50",
  "submitter": "Martin Jelinek at Astro.Inst-AVCR,Ondrejov  <martin.jelinek@asu.cas.cz>",
  "eventId": "GRB 191016A"
}