{
  "bibcode": "2015GCN.18361....1M",
  "body": "Tomoki Morokuma (The University of Tokyo), Masaomi Tanaka (National\nAstronomical Observatory of Japan), Michitoshi Yoshida, Koji S.\nKawabata, Yousuke Utsumi (Hiroshima University), Mamoru Doi, Kentaro\nMotohara, Yoichi Tamura (The University of Tokyo), Fumio Abe (Nagoya\nUniversity), Kenta Fujisawa (Yamaguchi University), Nobuyuki Kawai\n(Tokyo Tech), Koji Ohta (Kyoto University), and Kenshi Yanagisawa\n(National Astronomical Observatory of Japan) on behalf of J-GEM\ncollaboration\n\nWe report optical imaging follow-up observations for a part of the\nnorthern skymap regions of G184098 with 1.05-m Kiso Schmidt telescope\nand its 2.2 deg x 2.2 deg field-of-view camera, Kiso Wide Field Camera\n(KWFC; Sako et al. 2012, SPIE, 8446, 84466L).\n\nWe took 180-sec exposure images in i-band for 5 fields as below (about\n24 deg2 in total).\n\nRA(J2000)   Dec(J2000)  starting UTC\n09:05:35.52 +10:27:00.0 2015-09-17 19:07:34\n09:14:32.16 +10:27:00.0 2015-09-17 19:13:09\n09:23:28.80 +10:27:00.0 2015-09-17 19:18:31\n09:32:25.44 +10:27:00.0 2015-09-17 19:23:54\n09:41:22.08 +10:27:00.0 2015-09-17 19:36:01\n\nThe 5-sigma limiting magnitudes (AB) are 18.8 mag and 16.2 mag in the\nfirst four exposures and the last exposure, respectively. The data\nreduction and transient finding with image subtraction were performed\nwith the pipeline developed for Kiso Supernova Survey (KISS) as\ndescribed in Morokuma et al. (2014, PASJ, 66, 114). The SDSS i-band data\nwas used as reference images for the subtraction. We do not find any\ntransients which are likely associated with external galaxies.",
  "circularId": 18361,
  "createdOn": 1443058686000,
  "email": "tmorokuma@ioa.s.u-tokyo.ac.jp",
  "subject": "LIGO/Virgo G184098: optical transient search with Kiso Schmidt telescope and KWFC on behalf of J-GEM collaboration",
  "submitter": "Tomoki Morokuma at U.TokyoJ-GEM  <tmorokuma@ioa.s.u-tokyo.ac.jp>",
  "eventId": "LIGO/Virgo G184098"
}