TITLE: GCN CIRCULAR NUMBER: 24615 SUBJECT: LIGO/Virgo S190512at: SVOM/GWAC-F60A observations DATE: 19/05/20 22:38:43 GMT FROM: Xiang-Gao Wang at GuangXi U 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.