{
  "bibcode": "2017GCN.20497....1Z",
  "body": "Haibin Zhao (PMO/CAS), Dong Xu (NAO/CAS), Bin Li, Getu Zhaori, Hao Lu\n(PMO/CAS), Hanjie Tan(CCU), Zhijian Xu, Wenxiong Li, Zesheng Yang,\nXiaofeng Wang(THU), Lifan Wang (PMO/CAS), Jujia Zhang(YNAO/CAS), Hao\nSong (THU), Jinzhong Liu, Hubiao Niu, Yu Zhang, Xuan Zhang, Guangxin Pu,\nShuguo Ma, Taozhi Yang, Fangfang Song (XAO/CAS), Tianmeng Zhang, Xu Zhou\n(NAO/CAS), Jirong Mao, Jinming Bai (YNAO/CAS), Huanxue Feng, Zipei\nZhu(NAO/CAS) report on behalf of the Gravitational Wave Follow-Up\nNetwork by NAO-PMO-XAO-YNAO in China (GWFUNC):\n\nWe have performed tiled observations of LIGO/Virgo G270580 (LVC, GCN\n20486) using the Nanshan One-meter Wide field Telescope (NOWT) in\nXinjiang, the 0.6/0.9-m Schmidt telescope at Xinglong, Hebei, and the\n1-m Chinese Near Earth Object Survey Telescope (CNEOST) at Xuyi, Jiangsu.\n\nCNEOST has a FOV of 3.0x3.0 deg^2, and covered more than 1200 square\ndegree from 10:19:45 UT to 21:46:16 UT on 2017-01-21 in the Sloan\nr-filter. The coverage skymap is at\n\nhttps://dl.dropboxusercontent.com/u/3665676/G270580/skymap20170121NEOST.jpg\n\nThe limit magnitude for this survey is of m(r)~21. Each field was\nvisited three times. Our vetting procedure gives rise to two GW optical\ncounterpart candidates, potentially supernovae:\n\nSource 1 (dubbed as PTSS-17dfc):\nRA (J2000) =10h26m42.37s\nDec(J2000) =+36:40:50.62\n\nwith m(r)=16.55 ��0.01 mag, and\n\nSource 2 (dubbed as PTSS-17dfn)\nRA(J2000) =09h59m44.71s\nDec(J2000)= +27:38:55.44\n\nwith m(r)=18.93 ��0.08 mag.\n\nThe NOWT has a FOV of 1.3 x 1.3 deg^2, and carried out observations in\nthe nights of 2017-01-20 and 2017-01-21. The liming magnitude is of\nm(r)~19. The above two candidates are not covered by NOWT's surveys.\n\nThe Schmidt telescope has a FOV of 1.5x1.5 deg^2, and carried out\nobservations in the night of 2017-01-21. The liming magnitude is of\nm(White)~19. The above two candidates are not covered by Schmidt's survey.\n\n\n\n\n\n--\nN: Jinzhong Liu, Dr.\nO: Main building, 213\nP: 150, Science 1-Street, Urumqi, Xinjiang 830011, China\nT: 86 991 3689027\nD: 2012-07-14\nE: optics@xao.ac.cn",
  "circularId": 20497,
  "createdOn": 1485092174000,
  "email": "liujinzh@xao.ac.cn",
  "subject": "LIGO/Virgo G270580: Two optical counterpart candidates from CNEOST",
  "submitter": "Jinzhong Liu at Xinjiang Astronomical Observatory  <liujinzh@xao.ac.cn>",
  "eventId": "LIGO/Virgo G270580"
}