{
  "bibcode": "2019GCN.24064....1M",
  "body": "Murata, K. L. (Tokyo Tech), Sasada, M., Nakaoka, T. (Hiroshima U.),\nMorokuma, T. (U. of Tokyo), and Utsumi, Y. (Stanford U./SLAC), on behalf of\nJ-GEM collaboration\n\nRight after receiving the first gravitational wave alert, S190408an, in the\nobserving run 3 (O3), we conducted optical and near-infrared imaging\nobservations of 7 nearby galaxies (see a table below) within the\nprobability skymap of S190408an with\n- 50 cm MITSuME telescope at Akeno Observatory using a 3 color imager in\ng���, Rc, Ic\n- 50 cm MITSuME telescope at Okayama Astrophysical Observatory using a 3\ncolor imager in g���, Rc, Ic\n- Kanata 150 cm telescope at Higashi-Hiroshima Observatory using HONIR -- a\n2 color imager in Rc and H (Sakimoto et al. 2012, SPIE, 8846, 884673;\nAkitaya et al. 2014, 9147, 91474O; Ui et al. 2014, 9147, 91476C)\n\nWe also performed blind imaging survey over 260 deg2 using Tomo-e Gozen\ncamera on the 105-cm Kiso Schmidt telescope which is a very wide-field (20\ndeg2 field-of-view) optical CMOS imager (Sako et al. 2018, SPIE, 10702,\n107020J). Data reduction is in progress.\n\nname RA Dec\nGL221849+205045 334.7061 20.846\nGL231817+515551 349.572 51.9309\nGL225419+384152 343.5806 38.6978\nGL225746+424819 344.4403 42.8053\nGL222235+224327 35.6449 22.7242\nGL222437+203049 336.153 20.5135\nGL184632-384819 281.6345 -38.8053\n\nThese observations were done in the framework of J-GEM collaboration\n(Morokuma et al. 2016, PASJ, 68, 9L).",
  "circularId": 24064,
  "createdOn": 1554757089000,
  "email": "murata@u.phys.nagoya-u.ac.jp",
  "subject": "LIGO-Virgo GW S190408an: J-GEM optical/NIR follow-up observations",
  "submitter": "Katsuhiro L. Murata at Nagoya U  <murata@u.phys.nagoya-u.ac.jp>"
}