LIGO/Virgo S190923y: No significant candidates in TAROT-GRANDMA observations

D. Turpin, P. Hello, K. Noysena, C. Thoene, M. Boer, N. Christensen, L. Eymar, A. Klotz, S. Antier, S. Basa, D. Corre, M. Coughlin, D. Coward, J. G. Ducoin, B. Gendre, D. A. Kann, C. Lachaud, N. Leroy, Tarot Network, Grandma Collaboration

Research output: Contribution to specialist publicationArticle in specialist publication

Abstract

We performed tiled observations of the LIGO/Virgo S190923y event with the TAROT-Reunion (TRE), TAROT-Calern (TCA) and TAROT-Chili (TCH) telescopes operating in the visible located respectively at Les Makes astronomical observatory, the Cote d'Azur observatory and La Silla ESO observatory (LaS/ESO). The observation started on 09/23/19 16:30:12 UTC for TRE which corresponds approximately to 215 minutes after the GW trigger time. For TCA it started on 09/23/19 18:22:31 UTC which corresponds approximately to 327 minutes after the GW trigger time. For TCH it started on 09/23/19 23:42:17 UTC which corresponds approximately to 647 minutes after the GW trigger time. We performed the following tiled observations : +-------+------------+------------+---------+---------+---------+ | Tele | TStart | TEnd | RA | DEC | Proba | | scope | [UTC] | [UTC] | [deg] | [deg] | [%] | |-------|------------+------------+---------+---------+---------| | TRE | 2019-09-23 | 2019-09-25 | 250.909 | -40.909 | 1.2 | | | 16:30:12 | 18:18:14 | | | | | TRE | 2019-09-23 | 2019-09-25 | 243.243 | -32.727 | 1.1 | | | 16:43:24 | 16:01:15 | | | | | TRE | 2019-09-23 | 2019-09-25 | 243.117 | -28.636 | 1.1 | | | 16:55:50 | 16:13:27 | | | | | TRE | 2019-09-23 | 2019-09-25 | 245.455 | -40.909 | 1 | | | 17:08:55 | 16:26:45 | | | | | TRE | 2019-09-23 | 2019-09-25 | 285 | -73.636 | 0.8 | | | 17:21:15 | 19:09:01 | | | | | TRE | 2019-09-23 | 2019-09-25 | 243 | -24.545 | 0.8 | | | 17:40:29 | 16:58:26 | | | | | TRE | 2019-09-23 | 2019-09-25 | 256.154 | -53.182 | 1.6 | | | 17:56:56 | 17:33:16 | | | | | TRE | 2019-09-23 | 2019-09-25 | 249.677 | -45 | 1.5 | | | 18:16:07 | 17:52:26 | | | | | TRE | 2019-09-23 | 2019-09-25 | 246.857 | -36.818 | 1.4 | | | 18:29:19 | 18:05:44 | | | | | TRE | 2019-09-23 | 2019-09-25 | 276 | -69.545 | 1 | | | 19:13:36 | 21:19:48 | | | | | TRE | 2019-09-23 | 2019-09-25 | 265.714 | -61.364 | 1.2 | | | 21:05:15 | 20:41:36 | | | | | TRE | 2019-09-23 | 2019-09-25 | 270 | -65.455 | 1.2 | | | 21:17:59 | 20:54:39 | | | | | TRE | 2019-09-23 | 2019-09-25 | 90 | 4.091 | 1.1 | | | 21:35:17 | 23:37:06 | | | | | TRE | 2019-09-23 | 2019-09-26 | 85.909 | 0 | 1 | | | 21:56:18 | 00:02:43 | | | | | TRE | 2019-09-23 | 2019-09-25 | 85.909 | 4.091 | 0.8 | | | 22:15:29 | 21:51:45 | | | | | TRE | 2019-09-23 | 2019-09-25 | 91.034 | 8.182 | 1.5 | | | 23:09:44 | 22:46:17 | | | | | TRE | 2019-09-24 | 2019-09-24 | 248.108 | -32.727 | 0.7 | | | 18:28:15 | 18:34:32 | | | | | TRE | 2019-09-24 | 2019-09-25 | 260.425 | -57.273 | 1.4 | | | 19:22:29 | 20:24:29 | | | | |-------|------------+------------+---------+---------+---------| | TCA | 2019-09-23 | 2019-09-25 | 150.95 | 48.27 | 0.1 | | | 18:22:31 | 02:58:48 | | | | | TCA | 2019-09-23 | 2019-09-25 | 89.075 | 11.156 | 0.1 | | | 23:41:57 | 03:19:06 | | | | | TCA | 2019-09-24 | 2019-09-24 | 81.575 | -9.256 | 0.1 | | | 00:27:20 | 03:03:58 | | | | | TCA | 2019-09-24 | 2019-09-24 | 80.112 | -11.112 | 0.1 | | | 00:40:21 | 00:46:41 | | | | | TCA | 2019-09-24 | 2019-09-26 | 79.7 | -9.256 | 0.1 | | | 00:47:07 | 00:23:08 | | | | | TCA | 2019-09-24 | 2019-09-26 | 92.783 | 3.733 | 0.1 | | | 00:53:52 | 00:29:56 | | | | | TCA | 2019-09-24 | 2019-09-25 | 146.538 | 46.414 | 0.2 | | | 01:26:35 | 02:32:55 | | | | | TCA | 2019-09-24 | 2019-09-25 | 149.185 | 46.414 | 0.2 | | | 01:33:22 | 02:35:21 | | | | | TCA | 2019-09-24 | 2019-09-25 | 151.832 | 46.414 | 0.2 | | | 01:40:06 | 02:46:24 | | | | | TCA | 2019-09-24 | 2019-09-25 | 148.223 | 48.27 | 0.1 | | | 01:59:17 | 03:05:36 | | | | | TCA | 2019-09-24 | 2019-09-25 | 145.495 | 48.27 | 0.1 | | | 02:06:01 | 03:12:21 | | | | | TCA | 2019-09-24 | 2019-09-24 | 142.768 | 48.27 | 0.1 | | | 02:18:25 | 02:24:45 | | | | | TCA | 2019-09-24 | 2019-09-25 | 153.677 | 48.27 | 0.1 | | | 02:25:12 | 18:31:12 | | | | | TCA | 2019-09-24 | 2019-09-25 | 156.405 | 48.27 | 0.1 | | | 02:31:57 | 18:38:00 | | | | | TCA | 2019-09-24 | 2019-09-25 | 83.022 | -7.401 | 0.1 | | | 02:38:42 | 01:14:45 | | | | | TCA | 2019-09-24 | 2019-09-25 | 159.132 | 48.27 | 0.1 | | | 02:50:52 | 18:57:10 | | | | | TCA | 2019-09-24 | 2019-09-25 | 147.433 | 42.703 | 0.1 | | | 03:04:26 | 04:08:35 | | | | | TCA | 2019-09-24 | 2019-09-25 | 161.859 | 48.27 | 0.1 | | | 03:30:18 | 02:06:41 | | | | |-------+------------+------------+---------+---------+---------+ | TCH | 2019-09-23 | 2019-09-25 | 261.239 | -54.505 | 0.2 | | | 23:42:17 | 03:18:23 | | | | | TCH | 2019-09-24 | 2019-09-25 | 251.119 | -52.686 | 0.2 | | | 00:03:52 | 23:38:03 | | | | | TCH | 2019-09-24 | 2019-09-25 | 243.214 | -36.323 | 0.2 | | | 00:08:26 | 23:44:47 | | | | | TCH | 2019-09-24 | 2019-09-26 | 265.656 | -69.05 | 0.1 | | | 00:34:28 | 00:10:43 | | | | | TCH | 2019-09-24 | 2019-09-25 | 239.646 | -21.777 | 0.2 | | | 02:05:45 | 00:41:50 | | | | | TCH | 2019-09-24 | 2019-09-25 | 239.014 | -19.959 | 0.2 | | | 02:24:51 | 01:01:21 | | | | | TCH | 2019-09-24 | 2019-09-25 | 285.466 | -70.868 | 0.2 | | | 02:50:54 | 23:57:11 | | | | | TCH | 2019-09-24 | 2019-09-26 | 296.15 | -74.505 | 0.1 | | | 03:29:45 | 00:36:07 | | | | | TCH | 2019-09-24 | 2019-09-25 | 265.656 | -58.141 | 0.2 | | | 05:14:24 | 06:20:43 | | | | | TCH | 2019-09-24 | 2019-09-25 | 93.211 | 5.495 | 0.2 | | | 05:53:19 | 06:59:50 | | | | | TCH | 2019-09-24 | 2019-09-25 | 92.787 | 10.95 | 0.4 | | | 06:26:33 | 07:32:51 | | | | | TCH | 2019-09-24 | 2019-09-25 | 94.624 | 10.95 | 0.4 | | | 06:33:19 | 07:39:36 | | | | | TCH | 2019-09-24 | 2019-09-25 | 90.95 | 10.95 | 0.3 | | | 06:40:04 | 07:46:20 | | | | | TCH | 2019-09-24 | 2019-09-25 | 94.148 | 9.132 | 0.3 | | | 06:46:48 | 07:53:05 | | | | | TCH | 2019-09-24 | 2019-09-25 | 96.46 | 10.95 | 0.2 | | | 07:01:09 | 08:05:28 | | | | | TCH | 2019-09-24 | 2019-09-25 | 94.07 | 7.314 | 0.2 | | | 07:18:38 | 08:24:58 | | | | | TCH | 2019-09-25 | 2019-09-26 | 239.793 | -27.707 | 0.2 | | | 01:27:40 | 00:03:57 | | | | | TCH | 2019-09-25 | 2019-09-25 | 242.134 | -21.777 | 0.1 | | | 01:46:49 | 01:53:08 | | | | |-------+------------+------------+---------+---------+---------+ TStart and TEnd refers respectively to the time of the first and last exposure for a given tile. Observations are not necessarily continuous in this interval. The Probability refers to the 2D spatial probability of the GW skymap enclosed in a given tile. Each TRE tile is 4.2x4.2 degrees and 1.9x1.9 degrees for TCA and TCH. These observations cover about 25.5% the cumulative probability of the Bayestar skymap available on Sep 23, 2019 13:01:56 UTC. The typical limiting magnitude is 17.0 and 18.0 for a 60.0 s exposure for TRE and TCA/TCH, respectively. The coverage map is available at: https://grandma-owncloud.lal.in2p3.fr/index.php/s/Y2sXYjRmkubuRrw No significant transient candidates were found during our low latency analysis. GRANDMA (Global Rapid Advanced Network Devoted to the Multi-messenger Addicts) is a network of robotic telescopes connected all over the world with both photometry and spectroscopy capabilities for Time- domain Astronomy (https://grandma.lal.in2p3.fr/). Details on the TRE, TCA and TCH telescopes are available on the GRANDMA web pages or on http://tarot.obs-hp.fr/. This circular is citable.
Original languageEnglish
Volume25847
Specialist publicationGRB Coordinates Network, Circular Service
Publication statusPublished - 1 Sep 2019

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