{
  "bibcode": "2020GCN.27939....1I",
  "body": "We observed the field of GRB 200613A (Bissaldi and Lesage, GCN #27930; Ohno et al., GCN #27931) with the IO:O camera mounted on the 2-m Liverpool Telescope located in La Palma, Spain. Observations started on June 13th at 22:20:26 UT (0.701 days after the GRB trigger) and we obtained a series of 60s images in the r filter.\n\nWe clearly detect in the stacked image the optical afterglow at the position reported by the Swift-XRT (Kennea et al., GCN #27936) and by OAJ, Kitab and AbAO (Kann et al., GCN #27935, GCN #27938; Pozanenko et al., GCN #27937). We measure a preliminary AB magnitude for the afterglow of r = 19.45 +- 0.20 mag (t_mid = 0.705 d) calibrated against Pan-STARRS catalogue stars.",
  "circularId": 27939,
  "createdOn": 1592131602000,
  "email": "luca.izzo@gmail.com",
  "subject": "GRB 200613A: Liverpool Telescope observations",
  "submitter": "Luca Izzo at DARK/NBI  <luca.izzo@gmail.com>",
  "eventId": "GRB 200613A"
}