{
  "bibcode": "2020GCN.27702....1G",
  "body": "B. Gendre, E. Moore, D. Coward, J.A. Moore (OzGrav-UWA),\nA. Klotz (IRAP-CNRS-OMP) report:\n\nWe imaged the field of GRB 200509A detected by Swift\n(trigger 970886, GCN 27701, Troja et al. 2020) with the Zadko robotic \ntelescope (D=100cm) located at the Zadko Observatory - Gingin, Australia.\n\nThe observations started about 6 hours after the GRB trigger. The \nelevation of the field was at 41 degrees above horizon at the start of \nthe observation and decreasing, and weather conditions were good.\n\nInside the error box of the XRT afterglow, we did not detect any object \nat 2020-05-09T13:00:00, down to a R magnitude of 18.2. No further \nobservations are planned.\n\nMagnitudes were estimated with the nearby USNO-B1 stars\nand are not corrected for galactic dust extinction.\n\nThis message may be cited.",
  "circularId": 27702,
  "createdOn": 1589033096000,
  "email": "bruce.gendre@gmail.com",
  "subject": "GRB 200509A: Zadko observatory - Gingin optical upper limits",
  "submitter": "Bruce Gendre at UVI  <bruce.gendre@gmail.com>",
  "eventId": "GRB 200509A"
}