{
  "bibcode": "2021GCN.29221....1H",
  "body": "K. Hasuda, M. Nakamura, T. Sakamoto (AGU)\n\nWe observed the field of INTEGRAL Weak #8913 with the 14-inch\nAGU Robotic Optical Monitor for Astrophysical object - Narrow (AROMA-N)\nlocated at the Sagamihara campus of Aoyama Gakuin University.\n\n21 images of 60 sec exposures were taken in the R filter starting from\nDecember 31 12:31:05 (UT) about 110 seconds after the trigger and stopped\non December 31 12:57:06 (UT).  We do not detect an optical afterglow\nboth in the individual images and the stacked image.  The estimated\nfive sigma upper limit of the combined image (total exposure of 1260 sec)\nis ~16.8 mag using the USNO-B1 catalog.",
  "circularId": 29221,
  "createdOn": 1609555349000,
  "email": "tsakamoto@phys.aoyama.ac.jp",
  "subject": "INTEGRAL Weak #8913: AROMA-N Optical Observation",
  "submitter": "Takanori Sakamoto at AGU  <tsakamoto@phys.aoyama.ac.jp>"
}