{
  "bibcode": "2019GCN.24227....1B",
  "body": "M. Blazek (HETH/IAA-CSIC), N. Christensen (Artemis),\nE. Howell (OzGrav-UWA), M. Vardosanidze (Iliauni), M. Boer (Artemis),\nL. Eymar (Artemis), A. Klotz (IRAP), R. Laugier (Artemis),\nK. Noysena (Artemis, IRAP), S. Antier (APC), S. Basa (LAM),\nD. Corre (LAL), M. Coughlin (Caltech), D. Coward (OzGrav-UWA),\nJ.G. Ducoin (LAL), B. Gendre (OzGrav-UWA), P. Hello (LAL),\nC. Lachaud (APC), N. Leroy (LAL), D. Turpin (NAOC), X. Wang (THU)\n\nReport on behalf of the TAROT network and GRANDMA collaborations.\n\nWe performed tiled observations of LIGO/VIRGO event S190425z (GCN #24168)\nwith the TAROT-Reunion (Les Makes Observatory, La R��union Island, France)\ntelescope operating in clear filter.\n\nThe observation started on 04/25/19 14:56:19 UTC which corresponds\napproximately to 6.65 hours after the GW trigger time.\n\nWe performed the following tiled observations :\n\n+------------+------------+---------+---------+---------+\n| TStart     | TEnd       | RA      | DEC     |   Proba |\n| [UTC]      | [UTC]      | [deg]   | [deg]   |     [%] |\n|------------+------------+---------+---------+---------|\n| 2019-04-25 | 2019-04-25 | 194.595 | 30      |     0.2 |\n| 14:56:19   | 22:29:56   |         |         |         |\n| 2019-04-25 | 2019-04-25 | 182.338 | 25.714  |     0.2 |\n| 17:03:57   | 17:55:18   |         |         |         |\n| 2019-04-25 | 2019-04-25 | 189.73  | 30      |     0.3 |\n| 17:16:58   | 21:51:14   |         |         |         |\n| 2019-04-25 | 2019-04-26 | 243.117 | 25.714  |     0.6 |\n| 18:07:39   | 01:40:56   |         |         |         |\n| 2019-04-25 | 2019-04-26 | 246.076 | 21.429  |     0.7 |\n| 18:20:49   | 01:09:32   |         |         |         |\n| 2019-04-25 | 2019-04-25 | 238.442 | 25.714  |     0.9 |\n| 19:11:40   | 22:16:40   |         |         |         |\n| 2019-04-25 | 2019-04-26 | 241.519 | 21.429  |     0.7 |\n| 19:43:51   | 00:18:12   |         |         |         |\n+------------+------------+---------+---------+---------+\n\n\nThe Probability refers to the 2D spatial probability of the GW skymap\nenclosed in a given tile. Each tile is 4.2x4.2 degrees. These observations\ncover about 3% of the cumulative probability of the skymap. The typical\n3-sigma limiting magnitude for a two minutes exposure is 17 mag.\n\nThe coverage map is available at:\nhttps://grandma-owncloud.lal.in2p3.fr/index.php/s/tZTxGSoCEMc4fwG\n\nOptical transient candidates will be sent through another GCN\ncircular depending on our data analysis.\n\nGRANDMA (Global Rapid Advanced Network Devoted to the Multi-messenger\nAddicts) is a network of robotic telescopes connected all over the\nworld with both photometry and spectrometry capabilities for Time-\ndomain Astronomy (https://grandma.lal.in2p3.fr/). Details on the TAROT\ntelescopes are available on the GRANDMA web pages or on\nhttp://tarot.obs-hp.fr/",
  "circularId": 24227,
  "createdOn": 1556292572000,
  "email": "alf@iaa.es",
  "subject": "LIGO/Virgo S190425z: TAROT-GRANDMA observation report",
  "submitter": "Martin Blazek at HETH/IAA-CSIC  <alf@iaa.es>",
  "eventId": "LIGO/Virgo S190425z"
}