{
  "submitter": "Chao Wu at NAOC  <wuchao.lamost@gmail.com>",
  "format": "text/plain",
  "body": "J.Y. Wei (NAOC), X.H. Han (NAOC), C. WU (NAOC), N. Leroy (LAL),S. Antier\n(LAL), L.P. Xin (NAOC), X.M. Meng (NAOC), L. Huang (NAOC), Y. Xu(NAOC),\nH.B. Cai (NAOC), J. Wang(NAOC), X.M. Lu (NAOC), Y.L. Qiu (NAOC), J.S. Deng\n(NAOC), L. Cao (NAOC), S. Wang (NAOC), L. Jia (NAOC), S.C.Zou (NAOC), S.F.\nLiu (NAOC), Q.C. Feng (NAOC), H.L. Li (NAOC), D.W. Xu (NAOC),Y.J. Xiao\n(NAOC), W.L. Dong (NAOC), Y.T. Zheng (NAOC), E.W.Liang (GXU),\nX.G.Wang(GXU), Y.G. Yang (HBNU), B. Cordier (CEA), S.N. Zhang (NAOC),\nD. Dornic (CPPM) , B.B. Wu (IHEP), Jean-Luc Atteia (IRAP), D. Götz (CEA),C.\nLachaud (APC) on behalf of the SVOM Gravitational Astronomy group report:\n\nWe observed about 3600 square degree (9 sky regions) of the skymap of the\nadvanced LIGO trigger G270580, with SVOM/Mini-GWAC, at Xinglong Observatory\nof NAOC equipped\nwith U9000 camera (FOV~400 square degree/camera). SVOM/Mini-GWAC comprises\n12 wide field angle cameras (aperture=7cm), working with unfiltered band.\nThe observations\nare operated in time-series mode, taking one exposure in 15 seconds (10s\nexposure + 5s readout). The limit magnitude is ~12 mag in R band. We\nestimate a 66.9% prior probability that these 9 regions contain the true\nlocation of the source.\n\nThe coordinates of the 9 regions and observation time are list following:\n\nstart-obs(UTC) end-obs(UTC) Ra Dec Camera_ID\n2017-01-20 12:50:28.3 2017-01-20 14:15:07.6 09:10:23.301 +29:35:57.71 C1\n2017-01-20 12:50:28.3 2017-01-20 22:14:58.6 09:12:26.259 +10:35:26.10 C2\n2017-01-20 13:50:51.4 2017-01-20 19:47:59.1 06:36:32.060 +69:30:22.27 C5\n2017-01-20 13:50:51.4 2017-01-20 19:48:01.2 06:42:03.137 +50:31:15.23 C6\n2017-01-20 14:15:35.4 2017-01-20 22:19:45.5 09:17:48.639 +69:36:41.75 C1\n2017-01-20 14:15:35.4 2017-01-20 22:19:48.5 09:21:16.884 +50:34:54.73 C2\n2017-01-20 14:16:01.4 2017-01-20 21:24:39.2 09:08:57.610 +30:01:54.06 C3\n2017-01-20 14:16:01.4 2017-01-20 21:25:03.9 09:13:11.448 +09:57:30.75 C4\n2017-01-20 19:49:04.7 2017-01-20 21:36:13.2 10:34:34.322 +29:30:16.35 C5\n2017-01-20 19:49:27.9 2017-01-20 22:19:41.5 10:37:18.165 +10:30:56.78 C6\n2017-01-20 21:32:19.1 2017-01-20 22:19:53.1 13:29:12.042 +10:00:17.26\n\nThe first image was taken ~20 minutes after the event trigger. No any\nsignificant transient is found in our online pipeline. The image analysis\nis ongoing in detailed processing with our offline pipeline.",
  "editedBy": "Judith Racusin at NASA/GSFC <judith.racusin@nasa.gov> on behalf of Leo P. Singer at NASA/GSFC <leo.p.singer@nasa.gov>",
  "email": "wuchao.lamost@gmail.com",
  "version": 2,
  "createdOn": 1484958665000,
  "circularId": 20490,
  "bibcode": "2017GCN.20490....1W",
  "subject": "LIGO/Virgo G270580: Observations of initial skymap by Project Mini-GWAC of SVOM",
  "editedOn": 1731773642568,
  "eventId": "LIGO/Virgo G270580"
}