{
  "bibcode": "2019GCN.25136....1L",
  "body": "Bin Li, Hai-bin Zhao (PMO),Dong Xu, Zi-pei Zhu, Bang-Yao Yu,Tian-meng Zhang, Xu Zhou,Chen-zhou Cui, Hui-juan Wang(NAOC), Xue-feng Wu, Zhi-ping Jin, Tian-rui Sun, Hao Lu, Ge-tu Zhaori, Ren-quan Hong, Long-fei Hu (PMO), Xiao-feng Wang, Wen-xiong Li (THU),Li-fan Wang (PMO/TAMU), Jin-zhong Liu (XAO), Ji-rong Mao, Jin-ming Bai (YNAO),  report on behalf of the CNEOST collaboration.\n\n We conducted optical imaging observations for gravitational wave alert with Chinese Near Earth Object Survey Telescope (CNEOST) at Xuyi astronomical station in Jiangsu Province, China (32.75N, 118.47E). The information of observations and preliminary results are listed below.\n\nAlert: LIGO/Virgo S190720a (GCN #25115)\nStartTime (UT):               2019-07-20T13:52:48.017       \nEndTime (UT):                 2019-07-20T14:48:48.031       \nSkycover (Square Degree):     135.0   \nTelescope FoV (Square Degree):9.0     \n#id CentRA(D) CentDEC(D) LimiteMag3_sig 5_sig 10_sig Filter \n  1 231.208405  43.572357    -\t     21.204   18.323   SR\n  2 242.761490  46.336327   21.949   21.134   18.424   SR\n  3 242.799225  43.565426   22.074   21.229   18.375   SR\n  4 228.608490  40.790733    -\t     21.204   18.483   SR\n  5 221.265320  40.808392   21.856   21.045   18.350   SR\n  6 231.208405  43.572357    -       21.204   18.323   SR\n  7 242.761490  46.336327   21.949   21.134   18.424   SR\n  8 242.799225  43.565426   22.074   21.229   18.375   SR\n  9 228.608490  40.790733    -       21.204   18.483   SR\n 10 221.265320  40.808392   21.856   21.045   18.350   SR\n 11 231.208405  43.572357    -       21.204   18.323   SR\n 12 242.761490  46.336327   21.949   21.134   18.424   SR\n 13 242.799225  43.565426   22.074   21.229   18.375   SR\n 14 228.608490  40.790733    -       21.204   18.483   SR\n 15 221.265320  40.808392   21.856   21.045   18.350   SR\n\nThe new resulte will available at http://www.cneost.org/opem/list.php?gdate=2019-07-20",
  "circularId": 25136,
  "createdOn": 1563717698000,
  "email": "binli@pmo.ac.cn",
  "subject": "LIGO/Virgo S190720a: No counterpart candidates in CNEOST observations",
  "submitter": "Bin Li at PMO  <binli@pmo.ac.cn>",
  "eventId": "LIGO/Virgo S190720a"
}