{
  "bibcode": "2013GCN.15593....1K",
  "body": "D. Kawamura, T. Sakamoto, I. Takahashi, S. Sugai, A. Yoshida (AGU)\n\nWe observed the field of INTEGRAL Weak trigger #6403 with the 12-inch \nAGU Robotic Optical Monitor for Astrophysical object - Narrow (AROMA-N) \nlocated at the Sagamihara campus of Aoyama Gakuin University.  \n\n60 images of 10 sec exposures and 30 images of 60 sec exposures were \ntaken in the R filter starting from December 13 10:45:22 (UT) about 109 sec \nafter the trigger (103 sec after the INTEGRAL weak trigger notice) and \nstopped on December 13 11:40:24 (UT).  We do not detect the optical \nafterglow both in the individual images and the stacked image, which \ncombined 89 good quality images, inside the INTEGRAL weak position.  \nThe estimated five sigma upper limit of the combined image (total exposure \nof  2390 sec) is ~17.0 mag using the USNO-B1 catalog.",
  "circularId": 15593,
  "createdOn": 1386856139000,
  "email": "tsakamoto@phys.aoyama.ac.jp",
  "subject": "INTEGRAL Weak trigger #6403: AROMA-N Optical Observation",
  "submitter": "Takanori Sakamoto at AGU  <tsakamoto@phys.aoyama.ac.jp>"
}