{
  "bibcode": "2020GCN.27445....1N",
  "body": "M. Nakamura, T. Sakamoto (AGU)\n\nWe observed the field of GRB 200324A detected by Swift\n(Dichiara et al., GCN Circ. 27428) with the 14-inch AGU Robotic\nOptical Monitor for Astrophysical object - Narrow (AROMA-N)\nlocated at the Sagamihara campus of Aoyama Gakuin University.\n\n22 images of 60 sec, 120 sec, 180 sec and 300 sec exposures\nwere taken in the R filter starting from March 24 16:42:55 (UT)\nabout 228 seconds after the trigger and stopped on March 24 19:06:11 (UT).\nWe do not detect the optical afterglow both in the individual\nimages and the stacked image.  The estimated five sigma upper limit\nof the combined image (total exposure of 3240 sec) is ~17.6 mag\nusing the USNO-B1 catalog.",
  "circularId": 27445,
  "createdOn": 1585205051000,
  "email": "tsakamoto@phys.aoyama.ac.jp",
  "subject": "GRB 200324A: AROMA-N Optical Observation",
  "submitter": "Takanori Sakamoto at AGU  <tsakamoto@phys.aoyama.ac.jp>",
  "eventId": "GRB 200324A"
}