{
  "bibcode": "2018GCN.22352....1K",
  "body": "Y. Kitaoka, T. Sakamoto (AGU)\n\nWe observed the field of GRB 180111A detected by Swift\n(Lien et al. GCN circ. 22318) with the 0.3 m AROMA-N telescope\nlocated at Aoyama Gakuin University (Sagamihara, Japan).\n\n10 images of 60 sec exposures were taken in the R filter starting\nfrom January 11 on 16:44:50 (UT) about 3 minutes after the trigger\nand stopped on 16:56:51 (UT).  We do not detect the optical afterglow\nboth in the individual images and the stacked image at the location of\nthe optical afterglow (Lien et al. GCN circ. 22318).  The estimated\nfive sigma upper limit is ~16.6 mag using the USNO-B1 catalog.",
  "circularId": 22352,
  "createdOn": 1516112109000,
  "email": "tsakamoto@phys.aoyama.ac.jp",
  "subject": "GRB 180111A AROMA-N optical observation",
  "submitter": "Takanori Sakamoto at AGU  <tsakamoto@phys.aoyama.ac.jp>",
  "eventId": "GRB 180111A"
}