TITLE: GCN CIRCULAR NUMBER: 24315 SUBJECT: LIGO/Virgo S190425z: SVOM/GWAC-F60A observations DATE: 19/04/28 00:48:58 GMT FROM: Liping Xin at NAOC, SVOM L.P. Xin (NAOC), X.H. Han (NAOC), J.Y. Wei (NAOC), C. Wu (NAOC), D. Turpin (NAOC), J.G. Ducoin (CNRS/LAL), D. Corre (CNRS/LAL), 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), X.G. Wang (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. Götz (CEA/AIM), A. Claret (CEA/AIM), N. Leroy (CNRS/LAL), C. Lachaud (CNRS/APC), S. Antier (CNRS/APC/CNES), S.N. Zhang (IHEP), B.B. Wu (IHEP), report on behalf of the SVOM Ground Follow-up Group: We observed the LIGO/Virgo trigger S190425z 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 weather was not good during the observations. The first image was taken ~6 hours after the event trigger. No credible new source was detected in our pipeline. A total number of 80 galaxies were observed. The coordinates (J2000) of galaxies, the observation time, the limit magnitude (3sigma) and telescopes are listed below: # Ra Dec start-obs(UTC) Limit (R) Telescope 246.40900 16.45500 2019-04-25T14:07:30.157 16.86 F60A 235.47600 28.13410 2019-04-25T12:26:20.678 20.16 F60A 236.94100 28.64190 2019-04-25T13:38:20.485 18.81 F60A 186.25200 28.55850 2019-04-25T12:14:11.215 20.25 F60A 241.23600 23.93290 2019-04-25T13:09:22.662 16.66 F60A 243.74100 21.93830 2019-04-25T13:49:55.528 14.15 F60A 246.11400 19.48260 2019-04-25T13:44:10.488 16.35 F60A 247.40100 15.65840 2019-04-25T14:03:29.676 17.11 F60A 252.98900 4.38356 2019-04-26T15:14:39.330 20.03 F60A 253.53600 -7.63537 2019-04-26T15:41:09.103 19.00 F60A 248.25700 22.79720 2019-04-26T16:18:33.855 18.88 F60A 246.40900 16.45500 2019-04-26T13:39:32.350 19.24 F60A 242.31500 25.71250 2019-04-26T13:29:26.576 18.96 F60A 101.82200 33.56730 2019-04-26T13:03:41.172 18.12 F60A 213.21400 35.71070 2019-04-26T19:31:21.044 15.55 F60A 252.26500 -17.64590 2019-04-26T18:17:23.676 15.12 F60A 213.61300 36.40440 2019-04-26T19:12:15.038 16.48 F60A 252.69500 4.60474 2019-04-26T15:10:41.648 18.50 F60A 253.24500 2.40099 2019-04-26T15:06:31.427 18.98 F60A 252.92700 -2.61525 2019-04-26T15:30:55.776 18.12 F60A 251.59400 9.03763 2019-04-26T14:23:38.733 17.37 F60A 188.92200 26.52300 2019-04-26T12:50:39.801 19.69 F60A 236.90100 26.06370 2019-04-26T12:40:17.254 19.40 F60A 252.71300 8.78387 2019-04-26T15:57:48.620 18.05 F60A 216.14600 35.27980 2019-04-26T13:12:20.095 18.89 F60A 256.23700 -1.53050 2019-04-26T19:27:31.002 14.74 F60A 239.01600 24.44800 2019-04-26T18:58:18.867 16.39 F60A 240.75100 27.01030 2019-04-26T12:36:02.920 18.67 F60A 246.06300 20.18360 2019-04-26T14:06:52.457 18.67 F60A 256.68100 -4.93311 2019-04-26T19:42:41.710 14.82 F60A 236.97500 25.72940 2019-04-26T16:10:06.932 18.87 F60A 189.55500 28.93690 2019-04-26T12:03:09.117 18.55 F60A 203.60500 34.69040 2019-04-26T12:59:12.069 19.63 F60A 240.68800 25.25220 2019-04-26T14:45:39.591 19.17 F60A 251.85200 -20.14170 2019-04-26T18:25:26.961 13.73 F60A 252.33700 -17.64450 2019-04-26T16:46:18.132 14.91 F60A 254.52400 -21.27410 2019-04-26T18:29:34.531 13.66 F60A 265.63300 0.21675 2019-04-26T18:54:30.920 13.77 F60A 252.72300 -15.00400 2019-04-26T16:22:46.980 16.61 F60A 217.50600 36.36090 2019-04-26T19:08:30.994 16.65 F60A 242.40600 28.05180 2019-04-26T14:31:48.522 19.80 F60A 258.11900 -9.12416 2019-04-26T16:26:50.153 16.71 F60A 218.40500 35.96650 2019-04-26T14:11:05.568 19.82 F60A 200.21300 43.96540 2019-04-26T12:26:20.960 19.19 F60A 243.14800 29.48450 2019-04-26T19:16:03.251 16.82 F60A 208.41000 36.13420 2019-04-26T13:33:42.807 19.49 F60A 249.86000 11.21050 2019-04-26T14:27:45.663 19.03 F60A 216.08600 36.46140 2019-04-26T12:16:57.909 19.57 F60A 190.43600 35.06290 2019-04-26T13:08:04.914 19.41 F60A 212.69800 35.91340 2019-04-26T12:08:27.646 19.09 F60A 243.14800 29.48480 2019-04-26T18:42:22.185 16.77 F60A 251.94600 -7.21269 2019-04-26T16:30:59.956 16.95 F60A 203.64600 34.77790 2019-04-26T19:19:52.570 15.29 F60A 253.27000 -16.29090 2019-04-26T18:13:21.035 15.42 F60A 221.59100 32.78010 2019-04-26T13:20:54.590 20.53 F60A 182.57600 26.43080 2019-04-26T14:19:29.899 20.04 F60A 243.14700 29.36490 2019-04-26T19:35:09.298 15.77 F60A 252.07700 6.31221 2019-04-26T14:53:56.092 18.74 F60A 254.78000 -5.74199 2019-04-26T15:45:20.977 17.63 F60A 253.60000 -9.88924 2019-04-26T16:01:51.545 16.91 F60A 193.51000 29.60370 2019-04-26T13:25:15.579 19.72 F60A 194.91500 53.34130 2019-04-26T12:12:42.478 20.34 F60A 242.27700 24.87030 2019-04-26T18:46:29.445 15.58 F60A 260.77200 12.69540 2019-04-26T16:05:56.399 17.81 F60A 256.25200 -1.54133 2019-04-26T19:38:57.637 14.77 F60A 253.72400 -16.95200 2019-04-26T16:50:26.458 14.38 F60A 205.41500 55.67070 2019-04-26T16:14:20.651 19.45 F60A 252.09000 6.22276 2019-04-26T14:49:46.057 18.45 F60A 196.48300 53.65920 2019-04-26T16:35:23.719 18.93 F60A 240.66900 37.35940 2019-04-26T12:21:33.662 19.43 F60A 252.38800 6.01625 2019-04-26T14:57:55.285 18.43 F60A 253.03200 -17.05380 2019-04-26T18:21:23.262 14.86 F60A 254.50500 -1.82269 2019-04-26T15:26:51.357 17.91 F60A 240.36900 22.42770 2019-04-26T14:15:09.801 19.36 F60A 232.92900 40.86490 2019-04-26T13:16:36.533 20.10 F60A 243.89800 19.45340 2019-04-26T18:50:43.803 15.42 F60A 255.21800 2.10185 2019-04-26T15:18:42.705 18.77 F60A 197.38900 53.49420 2019-04-26T12:31:38.012 20.40 F60A 250.01400 15.88340 2019-04-26T14:02:46.419 19.04 F60A 245.79700 16.93260 2019-04-26T13:58:39.077 19.32 F60A This circular is citable.