{
  "bibcode": "2015GCN.18400....1K",
  "body": "K. S. Kawabata, R. Itoh, M. Kawabata, T. Nakaoka, H. Mori, K. Takaki (Hiroshima \nUniv.), and R. Shimotani (Kagawa Univ.) report on behalf of Kanata team:\n\nWe performed a series of optical imaging-polarimetry for the optical afterglow \nof GRB151006A (Kocevski et al., GCN 18398) from 73 sec after the Swift/BAT \ntrigger with HOWPol attached to the 1.5-m Kanata telescope at Higashi-Hiroshima\nObservatory, Japan.\n\nWe could not detect any afterglow within the XRT error circle reported in the \nGCN 18398. We obtained the following preliminary upper limits in our first \nimage (mid-time 88 sec after the trigger) calibrated with UCAC4:\n\nRc > 17.7\n\nFurther analysis is ongoing.",
  "circularId": 18400,
  "createdOn": 1444129512000,
  "email": "kawabtkj@hiroshima-u.ac.jp",
  "subject": "GRB 151006A: Kanata/HOWPol optical imaging polarimetry",
  "submitter": "Koji Kawabata at HASC,Hiroshima U  <kawabtkj@hiroshima-u.ac.jp>",
  "eventId": "GRB 151006A"
}