{
  "subject": "LIGO/Virgo S200219ac: no counterpart candidate in SVOM/GWAC-F30 observations",
  "eventId": "LIGO/Virgo S200219ac",
  "bibcode": "2020GCN.27170....1D",
  "createdOn": 1582476660000,
  "circularId": 27170,
  "submitter": "Jean-Gregoire Ducoin at LAL  <ducoin@lal.in2p3.fr>",
  "email": "ducoin@lal.in2p3.fr",
  "body": "J.-G. Ducoin(IJCLab), X. G. Wang (GXU), N. Leroy (IJCLab), \nJ. R. Mao (YNAO), S. S. Sun (GXU)\n\nreport on behalf of the SVOM Multi Messenger Astronomy and GWAC teams\n(http://www.svom.fr/en/svom-mma-and-gwac-team):\n\n\nWe observed 49 sky regions to cover the initial skymap of the \nLIGO/Virgo trigger S200219ac (GCN # 27130), with the SVOM/GWAC-F30 \ntelescope operated by Huaibei Normal University and NAOC, CAS \nat Xinglong Observatory, China. \nThe SVOM/GWAC-F30 is equipped with Standard Johnson filters\nand 4Kx4K FLI CCD (FOV~1.8x1.8 degree). The GWAC-F30 is using\ntiling observation strategy. The tiles are calculated to cover\nthe most probable regions of the 90% localization area given in the\nGW probability skymap. 5 images with a single exposure of 70s\ntime in R band are taken for each tile. The typical limiting magnitude\nof our image is 17 mag in the R band calibrated to USNO B1.0 R2.\nThe 49 tile coordinates and the observation periods are listed below:\n\n\nId    Ra        Dec     start (UTC)           end (UTC)             Proba.\n1  12:34:24.9 +55:24:20 2020-02-19 12:28:28.8 2020-02-19 13:47:43.6 0.010\n2  11:36:46.7 +30:25:48 2020-02-19 13:56:11.9 2020-02-19 14:02:11.4 0.003\n3  12:46:06.2 +55:24:14 2020-02-19 13:49:44.7 2020-02-19 13:54:30.6 0.009\n4  11:28:40.5 +33:07:23 2020-02-19 14:58:19.7 2020-02-19 15:04:15.0 0.006\n5  11:33:55.8 +34:49:07 2020-02-19 14:44:14.0 2020-02-19 14:50:09.3 0.006\n6  11:36:49.6 +30:26:29 2020-02-19 14:20:45.9 2020-02-19 14:26:39.3 0.003\n7  11:37:10.4 +55:57:27 2020-02-19 14:51:33.9 2020-02-19 14:56:47.2 0.000\n8  12:22:43.0 +55:24:12 2020-02-19 14:28:44.7 2020-02-19 14:35:09.6 0.007\n9  12:27:07.8 +53:41:48 2020-02-19 14:12:38.7 2020-02-19 14:19:03.7 0.009\n10 12:43:01.0 +57:05:13 2020-02-19 14:04:12.0 2020-02-19 14:10:32.9 0.007\n11 12:49:37.7 +53:41:05 2020-02-19 14:36:51.9 2020-02-19 14:42:29.6 0.008\n12 11:24:08.0 +31:26:19 2020-02-19 15:46:32.4 2020-02-19 15:51:38.1 0.006\n13 11:25:42.6 +34:49:40 2020-02-19 15:12:18.1 2020-02-19 15:17:17.4 0.006\n14 11:31:40.5 +36:31:26 2020-02-19 15:05:39.4 2020-02-19 15:10:32.8 0.006\n15 11:38:28.8 +38:13:57 2020-02-19 15:39:54.2 2020-02-19 15:45:01.7 0.006\n16 11:40:00.8 +36:32:08 2020-02-19 15:53:29.0 2020-02-19 15:58:33.5 0.006\n17 12:21:13.8 +51:48:38 2020-02-19 15:19:17.6 2020-02-19 15:24:17.0 0.006\n18 12:50:36.6 +62:00:08 2020-02-19 15:26:07.1 2020-02-19 15:31:12.0 0.006\n19 13:04:44.7 +61:59:58 2020-02-19 15:32:57.4 2020-02-19 15:37:56.9 0.006\n20 11:20:32.9 +33:08:45 2020-02-19 16:14:04.3 2020-02-19 16:19:05.9 0.006\n21 11:29:49.9 +38:14:53 2020-02-19 16:34:53.3 2020-02-19 16:39:54.4 0.005\n22 11:36:37.8 +33:08:44 2020-02-19 16:28:04.3 2020-02-19 16:33:08.7 0.005\n23 11:37:21.5 +39:56:53 2020-02-19 16:41:22.1 2020-02-19 16:46:26.8 0.005\n24 12:15:54.9 +53:32:34 2020-02-19 16:48:18.2 2020-02-19 16:53:20.2 0.006\n25 12:40:18.4 +58:38:27 2020-02-19 16:55:19.0 2020-02-19 17:00:25.6 0.005\n26 12:42:46.0 +51:49:31 2020-02-19 16:20:51.0 2020-02-19 16:25:56.8 0.006\n27 12:55:21.0 +56:54:48 2020-02-19 16:00:25.9 2020-02-19 16:05:25.8 0.005\n28 12:57:54.9 +55:12:56 2020-02-19 16:07:06.3 2020-02-19 16:12:09.0 0.005\n29 11:23:02.2 +36:33:40 2020-02-19 17:58:39.8 2020-02-19 18:03:45.8 0.005\n30 11:31:58.5 +31:27:11 2020-02-19 17:02:15.8 2020-02-19 17:07:17.5 0.005\n31 11:41:56.8 +34:51:32 2020-02-19 17:37:04.6 2020-02-19 17:42:11.3 0.004\n32 11:45:53.7 +41:39:02 2020-02-19 17:08:59.7 2020-02-19 17:14:08.0 0.005\n33 11:46:04.7 +39:57:07 2020-02-19 17:16:13.7 2020-02-19 17:21:20.1 0.005\n34 11:46:14.2 +43:21:28 2020-02-19 17:44:12.3 2020-02-19 17:49:17.3 0.004\n35 12:49:49.3 +63:45:08 2020-02-19 17:23:14.2 2020-02-19 17:28:21.0 0.005\n36 12:51:19.0 +60:21:29 2020-02-19 17:51:25.9 2020-02-19 17:56:30.9 0.005\n37 13:04:46.4 +63:45:05 2020-02-19 17:30:16.0 2020-02-19 17:35:17.2 0.004\n38 11:16:00.3 +31:27:07 2020-02-19 18:33:56.2 2020-02-19 18:39:03.9 0.005\n39 11:46:49.8 +38:15:31 2020-02-19 18:05:27.3 2020-02-19 18:10:34.6 0.004\n40 11:55:26.3 +43:21:34 2020-02-19 18:12:31.4 2020-02-19 18:17:41.8 0.004\n41 12:15:50.0 +50:09:45 2020-02-19 18:19:52.3 2020-02-19 18:25:00.3 0.005\n42 12:52:50.3 +58:39:49 2020-02-19 18:27:04.6 2020-02-19 18:32:06.9 0.004\n43 11:17:04.2 +34:50:41 2020-02-19 19:36:36.2 2020-02-19 19:41:42.0 0.004\n44 11:36:35.4 +41:39:15 2020-02-19 19:22:28.5 2020-02-19 19:27:36.9 0.004\n45 11:54:34.7 +41:39:16 2020-02-19 19:29:42.3 2020-02-19 19:34:52.2 0.004\n46 11:56:38.1 +45:03:23 2020-02-19 19:01:51.7 2020-02-19 19:06:53.4 0.004\n47 12:18:00.9 +56:57:17 2020-02-19 19:51:06.9 2020-02-19 19:56:11.4 0.004\n48 12:26:10.1 +50:09:41 2020-02-19 19:08:35.7 2020-02-19 19:13:39.8 0.005\n49 13:04:29.7 +60:21:41 2020-02-19 19:15:28.4 2020-02-19 19:20:33.1 0.005\n\nThe covering map is available at:\nhttp://cmm.svom.cn/gwpub/O3/S200219ac/S200219ac_F30.png\n(user:svomo3 pwd:gwo3)\n\nThe first image was taken ~3 hours after the event trigger time. \nNo credible new source is detected by our online pipeline.\nA more detailed image analysis is in progress with our offline pipeline\nto search for any fainter transient candidate."
}