{ "bibcode": "2019GCN.25593....1A", "body": "S. Antier (APC), C. Lachaud (APC), N. Christensen (Artemis), B. Gendre \n(OzGrav-UWA), N. Ismayilov (SHAO), M. Boer (Artemis), L. Eymar \n(Artemis), A. Klotz (IRAP), K. Noysena (Artemis, IRAP), S. Basa (LAM), \nD. Corre (LAL), M. Coughlin (Caltech), D. Coward (OzGrav-UWA), J.G. \nDucoin (LAL), P. Hello (LAL), N. Leroy (LAL), D. Turpin (NAOC), X. Wang \n(THU) report on behalf of the TAROT network and GRANDMA collaborations.\n\nWe performed tiled observations of the LIGO/Virgo event S190828l with \nthe TAROT-Chili (TCH), TAROT-Calern (TCA) and TAROT-Reunion (TRE) \ntelescopes operating in the visible located respectively at La Silla ESO \nObservatory (LaS/ESO), Calern site at the Cote d'Azur Observatory and \nLes Makes astronomical Observatory.\n\n\nThe observation started for TCH on 08/28/19 08:08:26 UTC which \ncorresponds to approximately 74 minutes after the GW trigger time.\n\nWe performed the following tiled observations :\n\n+-------+------------+------------+---------+---------+---------+\n| Tele | TStart | TEnd | RA | DEC | Proba |\n| scope | [UTC] | [UTC] | [deg] | [deg] | [%] |\n|-------+------------+------------+---------+---------+---------|\n| TCH | 2019-08-28 | 2019-08-30 | 155.236 | -61.777 | 0.5 |\n| | 08:08:26 | 09:29:11 | | | |\n| TCH | 2019-08-28 | 2019-08-29 | 157.656 | -63.595 | 0.5 |\n| | 08:15:15 | 23:35:28 | | | |\n| TCH | 2019-08-28 | 2019-08-30 | 149.185 | -58.141 | 0.5 |\n| | 08:22:03 | 09:41:21 | | | |\n| TCH | 2019-08-28 | 2019-08-30 | 159.192 | -61.777 | 0.5 |\n| | 08:28:51 | 09:48:09 | | | |\n| TCH | 2019-08-28 | 2019-08-30 | 160.538 | -59.959 | 0.3 |\n| | 09:06:48 | 00:27:25 | | | |\n| TCH | 2019-08-28 | 2019-08-29 | 163.148 | -61.777 | 0.3 |\n| | 08:51:18 | 09:33:23 | | | |\n| TCH | 2019-08-28 | 2019-08-30 | 153.421 | -63.595 | 0.3 |\n| | 08:58:06 | 00:39:41 | | | |\n| TCH | 2019-08-28 | 2019-08-28 | 152.715 | -58.141 | 0.8 |\n| | 09:29:56 | 09:58:42 | | | |\n| TCH | 2019-08-28 | 2019-08-30 | 153.115 | -59.959 | 0.7 |\n| | 09:36:44 | 09:08:47 | | | |\n| TCH | 2019-08-28 | 2019-08-30 | 156.244 | -58.141 | 0.6 |\n| | 10:14:23 | 09:22:23 | | | |\n| TCH | 2019-08-28 | 2019-08-30 | 151.28 | -61.777 | 0.3 |\n| | 08:37:52 | 00:20:37 | | | |\n| TCH | 2019-08-28 | 2019-08-30 | 166.126 | -63.595 | 0.2 |\n| | 23:39:52 | 00:46:29 | | | |\n| TCH | 2019-08-28 | 2019-08-30 | 167.45 | -65.414 | 0.2 |\n| | 23:46:40 | 00:53:17 | | | |\n| TCH | 2019-08-29 | 2019-08-30 | 156.826 | -59.959 | 0.6 |\n| | 00:39:07 | 09:15:35 | | | |\n| TCH | 2019-08-29 | 2019-08-30 | 162.95 | -65.414 | 0.4 |\n| | 01:37:16 | 00:13:48 | | | |\n| TCH | 2019-08-29 | 2019-08-30 | 153.95 | -65.414 | 0.2 |\n| | 00:01:13 | 08:35:31 | | | |\n| TCH | 2019-08-29 | 2019-08-30 | 158.45 | -65.414 | 0.4 |\n| | 01:24:45 | 10:01:45 | | | |\n| TCH | 2019-08-29 | 2019-08-29 | 149.404 | -59.959 | 0.4 |\n| | 09:00:58 | 09:07:28 | | | |\n| TCH | 2019-08-29 | 2019-08-30 | 161.49 | -67.232 | 0.2 |\n| | 09:52:35 | 01:00:05 | | | |\n| TCH | 2019-08-29 | 2019-08-30 | 161.891 | -63.595 | 0.5 |\n| | 01:17:57 | 09:54:57 | | | |\n|-------+------------+------------+---------+---------+---------|\n| TCA | 2019-08-28 | 2019-08-28 | -0.95 | 40.372 | 0.3 |\n| | 19:25:55 | 19:32:26 | | | |\n| TCA | 2019-08-28 | 2019-08-29 | 356.118 | 39.897 | 0.2 |\n| | 19:32:44 | 00:38:48 | | | |\n| TCA | 2019-08-28 | 2019-08-30 | 20.793 | 50.125 | 0.2 |\n| | 19:39:35 | 01:45:21 | | | |\n| TCA | 2019-08-28 | 2019-08-28 | 358.467 | 42.228 | 0.2 |\n| | 20:11:14 | 20:17:43 | | | |\n| TCA | 2019-08-28 | 2019-08-28 | 5.915 | 42.703 | 0.1 |\n| | 20:18:03 | 20:24:35 | | | |\n| TCA | 2019-08-28 | 2019-08-30 | 21.606 | 51.981 | 0.1 |\n| | 20:24:55 | 02:30:44 | | | |\n| TCA | 2019-08-28 | 2019-08-29 | 6.056 | 44.558 | 0.1 |\n| | 21:16:04 | 22:22:35 | | | |\n| TCA | 2019-08-28 | 2019-08-29 | 22.768 | 48.27 | 0.1 |\n| | 21:22:55 | 22:29:26 | | | |\n| TCA | 2019-08-28 | 2019-08-29 | 3.503 | 44.558 | 0.1 |\n| | 21:29:46 | 22:36:15 | | | |\n| TCA | 2019-08-28 | 2019-08-30 | 3.433 | 42.703 | 0.2 |\n| | 22:21:49 | 01:59:03 | | | |\n| TCA | 2019-08-28 | 2019-08-28 | 0.95 | 42.703 | 0.2 |\n| | 22:28:37 | 22:35:08 | | | |\n| TCA | 2019-08-28 | 2019-08-28 | 4.357 | 40.847 | 0.2 |\n| | 22:35:30 | 22:42:00 | | | |\n| TCA | 2019-08-28 | 2019-08-28 | 18.655 | 51.981 | 0.1 |\n| | 23:26:38 | 23:33:08 | | | |\n| TCA | 2019-08-28 | 2019-08-29 | 355.985 | 41.753 | 0.1 |\n| | 23:33:27 | 19:39:36 | | | |\n| TCA | 2019-08-28 | 2019-08-29 | 23.627 | 50.125 | 0.1 |\n| | 23:40:17 | 19:44:12 | | | |\n| TCA | 2019-08-29 | 2019-08-30 | 1.941 | 40.847 | 0.2 |\n| | 00:46:00 | 01:52:12 | | | |\n| TCA | 2019-08-29 | 2019-08-30 | 20.041 | 48.27 | 0.1 |\n| | 01:31:03 | 02:37:35 | | | |\n| TCA | 2019-08-29 | 2019-08-29 | 17.958 | 50.125 | 0.1 |\n| | 01:37:52 | 21:42:04 | | | |\n| TCA | 2019-08-29 | 2019-08-29 | 353.702 | 39.897 | 0.1 |\n| | 21:44:38 | 21:51:09 | | | |\n|-------+------------+------------+---------+---------+---------|\n| TRE | 2019-08-28 | 2019-08-28 | 331.034 | 8.182 | 0.4 |\n| | 21:08:23 | 21:14:51 | | | |\n| TRE | 2019-08-28 | 2019-08-28 | 338.571 | 16.364 | 0.4 |\n| | 21:21:39 | 21:28:07 | | | |\n| TRE | 2019-08-28 | 2019-08-29 | 354.857 | 36.818 | 1.2 |\n| | 22:02:37 | 20:39:07 | | | |\n| TRE | 2019-08-28 | 2019-08-29 | 330 | 16.364 | 0.3 |\n| | 23:57:44 | 00:04:12 | | | |\n| TRE | 2019-08-29 | 2019-08-29 | 350.27 | 32.727 | 1.4 |\n| | 00:26:17 | 00:32:45 | | | |\n| TRE | 2019-08-29 | 2019-08-29 | 342 | 24.545 | 1.1 |\n| | 00:39:00 | 00:45:28 | | | |\n| TRE | 2019-08-29 | 2019-08-29 | 330.698 | 12.273 | 0.7 |\n| | 16:23:40 | 16:30:08 | | | |\n| TRE | 2019-08-29 | 2019-08-29 | 333.659 | 20.455 | 0.5 |\n| | 16:41:25 | 16:43:25 | | | |\n| TRE | 2019-08-29 | 2019-08-29 | 345.974 | 28.636 | 1.1 |\n| | 20:45:52 | 20:52:26 | | | |\n+-------+------------+------------+---------+---------+---------+\n\n\nTStart and TEnd refer respectively to the time of the first and last \nexposure for a given tile. Observations are not necessarily continuous \nin this interval. The Probability refers to the 2D spatial probability \nof the GW skymap enclosed in a given tile. Each tile is 1.9x1.9 degrees \nfor TCA and TCH and 4.2x4.2 degrees for TRE. The coordinating \nobservations cover about 18% of the cumulative probability of the \nbayestar skymap available on Aug 28, 2019 07:17:33 UTC. The typical \nlimiting magnitude is 18.0 for a 60.0 s exposure for TCH and TCA and \n17.0 for a 60.0 s exposure for TRE.\n\nThe coverage map is available at:\nhttps://grandma-owncloud.lal.in2p3.fr/index.php/s/JF7J7CIdlrc7qs1\n\nNo significant transient candidates were found during our low latency \nanalysis.\n\nGRANDMA (Global Rapid Advanced Network Devoted to the Multi-messenger \nAddicts) is a network of robotic telescopes connected all over the world \nwith both photometry and spectrometry capabilities for Time-domain \nAstronomy (https://grandma.lal.in2p3.fr/). Details on the TAROT \ntelescope are available on the GRANDMA web pages\nor on\nhttp://tarot.obs-hp.fr/.", "circularId": 25593, "createdOn": 1567285640000, "email": "nelson.christensen@oca.eu", "subject": "LIGO/Virgo S190828l: No significant candidates in TAROT-GRANDMA observations", "submitter": "Nelson Christensen at Obs.de la Cote dAzur,Nice ", "eventId": "LIGO/Virgo S190828l" }