{
  "bibcode": "2017GCN.21685....1Y",
  "body": "Yoshida, M., Tanaka, M. (NAOJ), Utsumi, Y. (Hiroshima Univ.),\nTominaga, N. (Konan Univ.), Ohsawa, R., Motohara, K. (Univ. of\nTokyo), Terai, T., Nakata, F., Lee, C. H., Furusawa, H., Koshida,\nS. (NAOJ), Ohta, K. (Kyoto Univ.), Kawabata K. S. (Hiroshima\nUniv.), Morokuma, T., Yasuda, N. (Univ. of Tokyo), Kawai, N.\n(Tokyo Tech.), and Asakura, Y. (Nagoya Univ.) on behalf of the\nJ-GEM collaboration\n\nWe have performed z-band imaging observations of the OT candidate\nof G298048, SSS17a (Coulter et al., GCN 21529) with Hyper\nSuprime-Cam attached to the Subaru telescope on August 25.2 2017\nUT. We found that the z-band magnitude of the source was\nsignificantly fainter compared to our previous observations on\nAugust 19.2 2017 UT (Yoshida et al. GCN 21586; Tominaga et al.\nGCN 21595). Further analysis is ongoing.",
  "circularId": 21685,
  "createdOn": 1503646697000,
  "email": "yoshidam@hiroshima-u.ac.jp",
  "subject": "LIGO/Virgo G298048: Subaru HSC z-band imaging of the OT candidate SSS17a",
  "submitter": "Michitoshi Yoshida at J-GEM  <yoshidam@hiroshima-u.ac.jp>",
  "eventId": "LIGO/Virgo G298048"
}