{
  "bibcode": "2023GCN.33208....1G",
  "body": "B. Gendre (UWA/OzGrav), G. Stratta (INAF/Goethe University Frankfurt),\nE. Moore (UWA/OzGrav), F. Panther (UWA/OzGrav), D. Coward (UWA/OzGrav),\nJ. A. Moore (OzGrav-UWA), A. Klotz (IRAP-CNRS-OMP), and P. Thierry (AGORA)\nreport:\n\nWe imaged the field of GRB 230123A detected by SWIFT\n(trigger 1150429, GCN 33206, Williams et al. 2023)\nwith the Zadko robotic telescope (D=100cm)\nlocated at the Zadko observatory - Gingin, Australia.\n\nThe observations started 2.56h after the GRB trigger (t0+9213.4s).\nThe elevation of the field decreased from\n51 degrees above horizon and weather conditions\nwere good.\n\nWe observed the field for one hour, and have not detected any afterglow\ndown to magnitude 18.7 in individual images. On a stack of 6 images, we reached\nan upper limit of R = 19.0 with no detection of the afterglow.\nFurther observations are planned.\n\nMagnitudes were estimated with the nearby USNO-B1 stars\nand are not corrected for galactic dust extinction.\n\nN.B. Galactic coordinates are lon=286.2098 lat=-47.6419\nand the galactic extinction in R band is 0.0 magnitudes\nestimated from D. Schlegel et al. 1998ApJ...500..525S.\n\nThis message may be cited.\n======================================================================",
  "circularId": 33208,
  "createdOn": 1674484281000,
  "email": "bruce.gendre@gmail.com",
  "subject": "GRB 230123A: Zadko observatory - Gingin optical observations",
  "submitter": "Bruce Gendre at UVI  <bruce.gendre@gmail.com>",
  "eventId": "GRB 230123A"
}