{
  "circularId": 36941,
  "subject": "GRB240727A: Skynet Optical Afterglow Observations",
  "bibcode": "2024GCN.36941....1D",
  "submitter": "maedubay@unc.edu",
  "body": "Megan Dubay, Donovan Schlekat, Dylan Dutton, Ruide Fu, Daniel Reichart, Joshua Haislip, Vladimir Kouprianov report on behalf of the Skynet Robotic Telescope Network at the University of North Carolina at Chapel Hill.\n\nWe observed the field of GRB 240727A with one of the PROMPT telescopes at the Cerro-Tololo Inter-American Observatory. We began observing the field at 03:52:11 UTC on July 27, 2024. The first detection occurred at 04:27:12 UTC on July 27, 2024, approximately 40 minutes after the trigger reported by Swift (Parsotan et al., GCN 36938).\n\nWe detect the optical afterglow, also reported by (Zheng and Filippenko, GCN 36939) and (Liu et al., GCN 36940).\n\n\nThe coordinates are:\nR.A. (J2000): 15:45:45.02\nDec. (J2000): 08:37:12.95\n\nWe report the photometry below. \n\nExpLen  | Filter | Mag    | Mag Error | MJD         \n--------------------------------------------------\n61.45   | R      | 18.653 | 0.218     | 60518.1880\n184.35  | R      | 18.818 | 0.167     | 60518.1881\n184.35  | V      | 19.067 | 0.280     | 60518.1914\n\nOur images have been calibrated using stars from the APASS catalog.\n",
  "submittedHow": "web",
  "createdOn": 1722058813107,
  "eventId": "GRB 240727A",
  "format": "text/plain"
}