GCN Circular 24615

X.G. Wang (GXU), X.H. Han (NAOC), L.P. Xin (NAOC), J.Y. Wei (NAOC), C. Wu (NAOC),  D. Turpin (NAOC), N. LEROY (CNRS/LAL), S. ANTIER (CNRS/APC/CNES), 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. 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), P. P. Zhang (NAOC), R.S. Zhang (NAOC), E.W. Liang (GXU),  Z.G. Dai (NJU), X.Y. Wang (NJU), Y.G. Yang (HBNU), J.R. Mao (YNAO), B. Cordier (CEA/AIM), S. Basa (CNRS/LAM), J.L. Atteia (UPS/IRAP),D. Gotz (CEA/AIM), A. Claret (CEA/AIM), C. Lachaud (CNRS/APC), R. Duque (CNRS/IAP), N. Dagoneau (CEA/AIM) S.N. Zhang (IHEP), B.B. Wu (IHEP), report on behalf of the SVOM Ground Follow-up Group:

We observed the LIGO/Virgo trigger S190512at (GCN #24503) with GWAC-F60A. Two 60cm GWAC-F60(A/B) are operated by Guangxi University and NAOC, CAS, at Xinglong Observatory. China. They are equipped with Standard
Johnson filters and 2Kx2K Andor CCD (FOV~18x18 arcmin). GWAC-F60(A/B) are used for galaxy-targeted observations. The galaxies are selected from the GLADE catalog (Version 2.3, Dalya et al. 2018) in the probability skymap of GW event. All these galaxies were observed in clear band.

The first image was taken ~19.7 hours after the event trigger time T0=2019-05-12 18:07:14 UTC. No credible new source was detected in our pipeline. A total number of 43 galaxies were observed. The coordinates (J2000) of galaxies, the observation time, the limit magnitude (3sigma) and telescopes are listed below:
No.  RA                DEC       Start-obs(UTC)                  Limit (R) Telescope
1    14:36:42.001    +09:55:45.26    2019-05-13T12:48:33.079    19.59    F60A
2    14:38:47.519    +10:07:17.04    2019-05-13T13:59:47.864    18.46    F60A
3    15:06:45.119    -01:13:54.23    2019-05-13T12:58:55.753    19.10    F60A
4    14:44:29.281    +04:44:40.85    2019-05-13T12:37:01.477    19.24    F60A
5    15:11:41.039    -03:53:54.74    2019-05-13T15:18:18.559    19.27    F60A
6    14:41:26.880    +09:15:27.54    2019-05-13T19:34:49.642    18.24    F60A
7    14:33:06.001    +09:40:09.84    2019-05-13T12:42:46.387    19.24    F60A
8    14:52:11.521    +02:18:38.34    2019-05-13T17:38:24.972    19.25    F60A
9    14:47:03.599    +05:35:25.04    2019-05-13T14:06:27.778    19.76    F60A
10    14:41:04.081    +07:42:45.22    2019-05-13T15:52:57.033    19.37    F60A
11    14:34:30.241    +10:52:33.96    2019-05-13T16:22:25.302    19.01    F60A
12    14:59:57.599    -01:27:03.74    2019-05-13T14:41:19.946    19.76    F60A
13    15:09:39.121    -03:10:39.29    2019-05-13T13:04:32.492    18.76    F60A
14    15:17:08.401    -07:34:10.88    2019-05-13T16:27:42.187    18.91    F60A
15    15:10:43.680    -04:56:05.24    2019-05-13T18:20:32.299    19.40    F60A
16    15:05:41.039    -04:53:12.30    2019-05-13T14:23:45.297    19.54    F60A
17    15:07:06.960    -04:31:52.07    2019-05-13T14:12:11.179    19.36    F60A
18    14:59:18.960    +00:44:08.88    2019-05-13T15:30:56.668    19.28    F60A
19    14:41:17.279    +07:47:49.56    2019-05-13T19:12:41.070    19.03    F60A
20    14:43:29.521    +07:54:22.00    2019-05-13T18:29:10.610    19.43    F60A
21    14:36:18.479    +10:36:02.16    2019-05-13T14:35:29.636    19.70    F60A
22    14:45:29.761    +07:48:44.10    2019-05-13T18:43:34.454    19.87    F60A
23    15:05:42.961    -03:49:32.30    2019-05-13T18:07:18.669    19.34    F60A
24    15:20:03.599    -07:42:09.43    2019-05-13T14:29:34.082    19.04    F60A
25    15:24:07.920    -08:08:10.64    2019-05-13T14:17:57.171    19.00    F60A
26    15:29:28.799    -11:21:48.96    2019-05-13T15:24:50.133    19.28    F60A
27    14:38:47.519    +10:07:17.04    2019-05-13T13:59:47.864    18.46    F60A
28    15:11:41.039    -03:53:54.74    2019-05-13T15:18:18.559    19.27    F60A
29    14:41:26.880    +09:15:27.54    2019-05-13T19:34:49.642    18.24    F60A
30    14:52:11.521    +02:18:38.34    2019-05-13T17:38:24.972    19.25    F60A
31    14:47:03.599    +05:35:25.04    2019-05-13T14:06:27.778    19.76    F60A
32    14:41:04.081    +07:42:45.22    2019-05-13T15:52:57.033    19.37    F60A
33    14:34:30.241    +10:52:33.96    2019-05-13T16:22:25.302    19.01    F60A
34    14:59:57.599    -01:27:03.74    2019-05-13T14:41:19.946    19.76    F60A
35    15:17:08.401    -07:34:10.88    2019-05-13T16:27:42.187    18.91    F60A
36    15:10:43.680    -04:56:05.24    2019-05-13T18:20:32.299    19.40    F60A
37    15:05:41.039    -04:53:12.30    2019-05-13T14:23:45.297    19.54    F60A
38    15:07:06.960    -04:31:52.07    2019-05-13T14:12:11.179    19.36    F60A
39    14:59:18.960    +00:44:08.88    2019-05-13T15:30:56.668    19.28    F60A
40    14:41:17.279    +07:47:49.56    2019-05-13T19:12:41.070    19.03    F60A
41    14:43:29.521    +07:54:22.00    2019-05-13T18:29:10.610    19.43    F60A
42    14:36:18.479    +10:36:02.16    2019-05-13T14:35:29.636    19.70    F60A
43    14:45:29.761    +07:48:44.10    2019-05-13T18:43:34.454    19.87    F60A

This circular is citable.