GCN Circular 20490
Subject
LIGO/Virgo G270580: Observations of initial skymap by Project Mini-GWAC of SVOM
Date
2017-01-21T00:31:05Z (8 years ago)
Edited On
2024-11-16T16:14:02Z (4 months ago)
From
Chao Wu at NAOC <wuchao.lamost@gmail.com>
Edited By
Judith Racusin at NASA/GSFC <judith.racusin@nasa.gov> on behalf of Leo P. Singer at NASA/GSFC <leo.p.singer@nasa.gov>
J.Y. Wei (NAOC), X.H. Han (NAOC), C. WU (NAOC), N. Leroy (LAL),S. Antier
(LAL), L.P. Xin (NAOC), X.M. Meng (NAOC), L. Huang (NAOC), Y. Xu(NAOC),
H.B. Cai (NAOC), J. Wang(NAOC), X.M. Lu (NAOC), Y.L. Qiu (NAOC), J.S. Deng
(NAOC), L. Cao (NAOC), S. Wang (NAOC), L. Jia (NAOC), S.C.Zou (NAOC), S.F.
Liu (NAOC), Q.C. Feng (NAOC), H.L. Li (NAOC), D.W. Xu (NAOC),Y.J. Xiao
(NAOC), W.L. Dong (NAOC), Y.T. Zheng (NAOC), E.W.Liang (GXU),
X.G.Wang(GXU), Y.G. Yang (HBNU), B. Cordier (CEA), S.N. Zhang (NAOC),
D. Dornic (CPPM) , B.B. Wu (IHEP), Jean-Luc Atteia (IRAP), D. Götz (CEA),C.
Lachaud (APC) on behalf of the SVOM Gravitational Astronomy group report:
We observed about 3600 square degree (9 sky regions) of the skymap of the
advanced LIGO trigger G270580, with SVOM/Mini-GWAC, at Xinglong Observatory
of NAOC equipped
with U9000 camera (FOV~400 square degree/camera). SVOM/Mini-GWAC comprises
12 wide field angle cameras (aperture=7cm), working with unfiltered band.
The observations
are operated in time-series mode, taking one exposure in 15 seconds (10s
exposure + 5s readout). The limit magnitude is ~12 mag in R band. We
estimate a 66.9% prior probability that these 9 regions contain the true
location of the source.
The coordinates of the 9 regions and observation time are list following:
start-obs(UTC) end-obs(UTC) Ra Dec Camera_ID
2017-01-20 12:50:28.3 2017-01-20 14:15:07.6 09:10:23.301 +29:35:57.71 C1
2017-01-20 12:50:28.3 2017-01-20 22:14:58.6 09:12:26.259 +10:35:26.10 C2
2017-01-20 13:50:51.4 2017-01-20 19:47:59.1 06:36:32.060 +69:30:22.27 C5
2017-01-20 13:50:51.4 2017-01-20 19:48:01.2 06:42:03.137 +50:31:15.23 C6
2017-01-20 14:15:35.4 2017-01-20 22:19:45.5 09:17:48.639 +69:36:41.75 C1
2017-01-20 14:15:35.4 2017-01-20 22:19:48.5 09:21:16.884 +50:34:54.73 C2
2017-01-20 14:16:01.4 2017-01-20 21:24:39.2 09:08:57.610 +30:01:54.06 C3
2017-01-20 14:16:01.4 2017-01-20 21:25:03.9 09:13:11.448 +09:57:30.75 C4
2017-01-20 19:49:04.7 2017-01-20 21:36:13.2 10:34:34.322 +29:30:16.35 C5
2017-01-20 19:49:27.9 2017-01-20 22:19:41.5 10:37:18.165 +10:30:56.78 C6
2017-01-20 21:32:19.1 2017-01-20 22:19:53.1 13:29:12.042 +10:00:17.26
The first image was taken ~20 minutes after the event trigger. No any
significant transient is found in our online pipeline. The image analysis
is ongoing in detailed processing with our offline pipeline.