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GCN Circular 27275

Subject
LIGO/Virgo S200225q : No significant candidates in TAROT - FRAM - GRANDMA observations.
Date
2020-03-01T14:12:31Z (4 years ago)
From
Jean-Gregoire Ducoin at LAL <ducoin@lal.in2p3.fr>
J.-G. Ducoin (IJCLab), H. Crisp (OzGrav-UWA), P. Hello (IJCLab), T.
Sadibekova (AIM-CEA), Z. Vidadi (SHAO), M. Prouza (FZU), M. Boer 
(Artemis), N. Christensen (Artemis), L. Eymar (Artemis), S. Karpov
(FZU), A. Klotz (IRAP), M. Masek (FZU), K. Noysena (Artemis, IRAP),
S. Antier (APC), A. Coleiro (APC), D. Corre (IJCLab), M. Coughlin
(UMN), D. Coward (OzGrav-UWA), B. Gendre (OzGrav-UWA), D. A. Kann
(HETH/IAA-CSIC), N. Kochiashvili (Iliauni), C. Lachaud (APC),
N. Leroy (IJCLab), C. Thoene (HETH/IAA-CSIC), D. Turpin (AIM-CEA),
X. Wang (THU)

Report on behalf of the FRAM, TAROT and GRANDMA collaborations.

We performed tiled observations of LIGO/Virgo S200225q event with the
FRAM-Auger, FRAM-CTA-N, TAROT-Calern (TCA), TAROT-Chili (TCH), TAROT-
Reunion (TRE) telescopes.

FRAM-Auger is located at Pierre Auger Observatory. FRAM-CTA-N is 
located at Observatorio del Roque de los Muchachos. TCA is located at 
Calern site at the Cote d'Azur observatory. TCH is located at La Silla
ESO observatory (LaS/ESO). TRE is located at Les Makes astronomical 
observatory. 

The following table shows for each telescope: the delay in minutes 
from the trigger, which filter is used, the field of view of the 
telescope in degrees and the typical limiting magnitude (AB mag) for a
given exposure in seconds (s).

+-------------+---------+----------+-------------+------------+
| Telescope   | Delay   | Filter   | f.o.v.      | Limiting   |
|             | [min]   |          | [deg]       | Mag.       |
|-------------+---------+----------+-------------+------------|
| FRAM-Auger  | 1084    | R        | 1.0 x 1.0   | 18.0 (60s) |
| FRAM-CTA-N  | 826     | R        | 0.45 x 0.45 | 17.0 (90s) |
| TCA         | 718     | Clear    | 1.9 x 1.9   | 18.0 (60s) |
| TCH         | 1102    | Clear    | 1.9 x 1.9   | 18.0 (60s) |
| TRE         | 712     | Clear    | 4.2 x 4.2   | 17.0 (60s) |
+-------------+---------+----------+-------------+------------+

We performed the following joint tiled observations [1] :

+-------------+------------+------------+---------+---------+---------+
| Telescope   | TStart     | TEnd       | RA      | DEC     | Proba   |
|             | [UTC]      | [UTC]      | [deg]   | [deg]   | [%]     |
|-------------+------------+------------+---------+---------+---------|
| FRAM-Auger  | 2020-02-26 | 2020-02-26 | 103.893 | 36.486  | <0.1    |
|             | 00:08:04   | 00:12:30   |         |         |         |
| FRAM-Auger  | 2020-02-26 | 2020-02-26 | 104.082 | 37.459  | <0.1    |
|             | 00:13:05   | 00:17:32   |         |         |         |
| FRAM-Auger  | 2020-02-26 | 2020-02-26 | 105.306 | 37.459  | <0.1    |
|             | 00:18:07   | 00:22:34   |         |         |         |
| FRAM-Auger  | 2020-02-26 | 2020-02-26 | 103.709 | 35.514  | <0.1    |
|             | 00:23:09   | 00:27:36   |         |         |         |
| FRAM-Auger  | 2020-02-26 | 2020-02-26 | 103.869 | 34.541  | <0.1    |
|             | 00:28:10   | 00:32:37   |         |         |         |
| FRAM-Auger  | 2020-02-26 | 2020-02-26 | 102.524 | 33.568  | <0.1    |
|             | 00:33:12   | 00:37:39   |         |         |         |
| FRAM-Auger  | 2020-02-26 | 2020-02-26 | 102.689 | 34.541  | <0.1    |
|             | 00:38:13   | 00:42:40   |         |         |         |
| FRAM-Auger  | 2020-02-26 | 2020-02-26 | 105.101 | 36.486  | <0.1    |
|             | 00:43:32   | 00:47:58   |         |         |         |
| FRAM-Auger  | 2020-02-26 | 2020-02-26 | 102.532 | 31.622  | <0.1    |
|             | 00:48:34   | 00:53:01   |         |         |         |
| FRAM-Auger  | 2020-02-26 | 2020-02-26 | 102.692 | 32.595  | <0.1    |
|             | 00:53:37   | 00:58:03   |         |         |         |
| FRAM-Auger  | 2020-02-26 | 2020-02-26 | 103.689 | 33.568  | <0.1    |
|             | 00:58:38   | 01:03:05   |         |         |         |
| FRAM-Auger  | 2020-02-26 | 2020-02-26 | 101.392 | 31.622  | <0.1    |
|             | 01:10:24   | 01:14:51   |         |         |         |
| FRAM-Auger  | 2020-02-26 | 2020-02-26 | 101.567 | 30.649  | <0.1    |
|             | 02:23:25   | 02:27:52   |         |         |         |
| FRAM-Auger  | 2020-02-26 | 2020-02-26 | 104.901 | 35.514  | <0.1    |
|             | 02:28:28   | 02:32:55   |         |         |         |
| FRAM-Auger  | 2020-02-26 | 2020-02-26 | 102.517 | 35.514  | <0.1    |
|             | 02:33:30   | 03:28:23   |         |         |         |
| FRAM-Auger  | 2020-02-26 | 2020-02-26 | 101.739 | 29.676  | <0.1    |
|             | 03:29:00   | 03:33:27   |         |         |         |
| FRAM-Auger  | 2020-02-26 | 2020-02-26 | 102.685 | 36.486  | <0.1    |
|             | 03:34:04   | 03:38:31   |         |         |         |
| FRAM-Auger  | 2020-02-26 | 2020-02-26 | 101.538 | 32.595  | <0.1    |
|             | 03:39:06   | 03:43:33   |         |         |         |
| FRAM-Auger  | 2020-02-26 | 2020-02-26 | 100.800 | 28.703  | <0.1    |
|             | 03:44:09   | 03:48:36   |         |         |         |
| FRAM-Auger  | 2020-02-26 | 2020-02-26 | 100.621 | 29.676  | <0.1    |
|             | 03:49:10   | 03:53:37   |         |         |         |
| -----       | -----      | -----      | -----   | -----   | -----   |
| FRAM-CTA-N  | 2020-02-25 | 2020-02-25 | 110.284 | 52.215  | <0.1    |
|             | 19:50:06   | 19:54:12   |         |         |         |
| FRAM-CTA-N  | 2020-02-25 | 2020-02-25 | 107.353 | 45.662  | <0.1    |
|             | 19:54:33   | 19:58:39   |         |         |         |
| FRAM-CTA-N  | 2020-02-25 | 2020-02-25 | 107.901 | 47.846  | <0.1    |
|             | 19:58:54   | 20:03:00   |         |         |         |
| FRAM-CTA-N  | 2020-02-25 | 2020-02-25 | 110.326 | 53.089  | <0.1    |
|             | 20:03:16   | 20:07:22   |         |         |         |
| FRAM-CTA-N  | 2020-02-25 | 2020-02-25 | 109.574 | 52.215  | <0.1    |
|             | 20:07:36   | 20:11:42   |         |         |         |
| FRAM-CTA-N  | 2020-02-25 | 2020-02-25 | 108.549 | 47.846  | <0.1    |
|             | 20:12:04   | 20:16:10   |         |         |         |
| FRAM-CTA-N  | 2020-02-25 | 2020-02-25 | 106.534 | 43.914  | <0.1    |
|             | 20:16:28   | 20:20:34   |         |         |         |
| FRAM-CTA-N  | 2020-02-25 | 2020-02-25 | 108.357 | 48.720  | <0.1    |
|             | 20:20:50   | 20:24:56   |         |         |         |
| FRAM-CTA-N  | 2020-02-25 | 2020-02-25 | 109.548 | 51.342  | <0.1    |
|             | 20:25:12   | 20:29:18   |         |         |         |
| FRAM-CTA-N  | 2020-02-25 | 2020-02-25 | 108.828 | 49.594  | <0.1    |
|             | 20:29:32   | 20:33:38   |         |         |         |
| FRAM-CTA-N  | 2020-02-25 | 2020-02-25 | 105.732 | 41.293  | <0.1    |
|             | 20:34:00   | 20:38:06   |         |         |         |
| FRAM-CTA-N  | 2020-02-25 | 2020-02-25 | 106.937 | 44.788  | <0.1    |
|             | 20:38:28   | 20:42:34   |         |         |         |
| FRAM-CTA-N  | 2020-02-25 | 2020-02-25 | 110.414 | 54.612  | <0.1    |
|             | 20:42:51   | 20:46:57   |         |         |         |
| FRAM-CTA-N  | 2020-02-25 | 2020-02-25 | 106.038 | 42.604  | <0.1    |
|             | 20:47:15   | 20:51:21   |         |         |         |
| FRAM-CTA-N  | 2020-02-25 | 2020-02-25 | 107.906 | 46.973  | <0.1    |
|             | 20:51:37   | 20:55:43   |         |         |         |
| FRAM-CTA-N  | 2020-02-25 | 2020-02-25 | 110.369 | 53.963  | <0.1    |
|             | 20:55:59   | 21:00:05   |         |         |         |
| FRAM-CTA-N  | 2020-02-25 | 2020-02-25 | 109.523 | 50.468  | <0.1    |
|             | 21:00:21   | 21:04:26   |         |         |         |
| FRAM-CTA-N  | 2020-02-25 | 2020-02-25 | 108.840 | 50.468  | <0.1    |
|             | 21:04:40   | 21:08:46   |         |         |         |
| FRAM-CTA-N  | 2020-02-25 | 2020-02-25 | 109.016 | 48.720  | <0.1    |
|             | 21:09:07   | 21:13:13   |         |         |         |
| FRAM-CTA-N  | 2020-02-25 | 2020-02-25 | 105.178 | 39.545  | <0.1    |
|             | 21:13:30   | 21:17:36   |         |         |         |
| FRAM-CTA-N  | 2020-02-26 | 2020-02-26 | 139.091 | 86.942  | 0.8     |
|             | 23:03:21   | 23:07:26   |         |         |         |
| FRAM-CTA-N  | 2020-02-26 | 2020-02-26 | 147.273 | 86.942  | 0.6     |
|             | 23:07:41   | 23:11:47   |         |         |         |
| FRAM-CTA-N  | 2020-02-26 | 2020-02-26 | 151.200 | 86.505  | 0.6     |
|             | 23:12:01   | 23:16:06   |         |         |         |
| FRAM-CTA-N  | 2020-02-26 | 2020-02-26 | 144.000 | 86.505  | 0.5     |
|             | 23:16:20   | 23:20:26   |         |         |         |
| FRAM-CTA-N  | 2020-02-26 | 2020-02-26 | 130.909 | 86.942  | 0.5     |
|             | 23:20:53   | 23:24:58   |         |         |         |
| FRAM-CTA-N  | 2020-02-26 | 2020-02-26 | 122.400 | 86.505  | 0.5     |
|             | 23:25:13   | 23:29:19   |         |         |         |
| FRAM-CTA-N  | 2020-02-26 | 2020-02-26 | 115.200 | 86.505  | 0.4     |
|             | 23:29:33   | 23:33:39   |         |         |         |
| FRAM-CTA-N  | 2020-02-26 | 2020-02-26 | 115.714 | 86.068  | 0.4     |
|             | 23:33:52   | 23:37:57   |         |         |         |
| FRAM-CTA-N  | 2020-02-26 | 2020-02-26 | 116.129 | 85.631  | 0.4     |
|             | 23:38:10   | 23:42:16   |         |         |         |
| FRAM-CTA-N  | 2020-02-26 | 2020-02-26 | 129.600 | 86.505  | 0.4     |
|             | 23:42:32   | 23:46:38   |         |         |         |
| FRAM-CTA-N  | 2020-02-26 | 2020-02-26 | 122.143 | 86.068  | 0.4     |
|             | 23:46:52   | 23:50:58   |         |         |         |
| FRAM-CTA-N  | 2020-02-26 | 2020-02-26 | 121.936 | 85.631  | 0.4     |
|             | 23:51:10   | 23:55:17   |         |         |         |
| FRAM-CTA-N  | 2020-02-26 | 2020-02-26 | 136.800 | 86.505  | 0.4     |
|             | 23:55:32   | 23:59:38   |         |         |         |
| FRAM-CTA-N  | 2020-02-26 | 2020-02-27 | 110.323 | 85.631  | 0.4     |
|             | 23:59:54   | 00:04:00   |         |         |         |
| FRAM-CTA-N  | 2020-02-27 | 2020-02-27 | 128.571 | 86.068  | 0.4     |
|             | 00:04:17   | 00:08:23   |         |         |         |
| FRAM-CTA-N  | 2020-02-27 | 2020-02-27 | 158.400 | 86.505  | 0.4     |
|             | 00:08:49   | 00:12:54   |         |         |         |
| FRAM-CTA-N  | 2020-02-27 | 2020-02-27 | 114.783 | 85.194  | 0.4     |
|             | 00:13:19   | 00:17:25   |         |         |         |
| FRAM-CTA-N  | 2020-02-27 | 2020-02-27 | 155.455 | 86.942  | 0.4     |
|             | 00:17:49   | 00:21:55   |         |         |         |
| FRAM-CTA-N  | 2020-02-27 | 2020-02-27 | 109.286 | 86.068  | 0.3     |
|             | 00:22:20   | 00:26:26   |         |         |         |
| FRAM-CTA-N  | 2020-02-27 | 2020-02-27 | 127.742 | 85.631  | 0.3     |
|             | 00:26:42   | 00:30:48   |         |         |         |
| -----       | -----      | -----      | -----   | -----   | -----   |
| TCA         | 2020-02-25 | 2020-02-27 | 110.041 | 48.270  | <0.1    |
|             | 18:01:40   | 02:54:13   |         |         |         |
| TCA         | 2020-02-25 | 2020-02-27 | 113.891 | 59.404  | <0.1    |
|             | 18:08:28   | 01:16:38   |         |         |         |
| TCA         | 2020-02-25 | 2020-02-27 | 110.130 | 51.981  | <0.1    |
|             | 18:34:56   | 00:12:04   |         |         |         |
| TCA         | 2020-02-25 | 2020-02-26 | 115.303 | 64.971  | <0.1    |
|             | 18:41:42   | 21:18:35   |         |         |         |
| TCA         | 2020-02-25 | 2020-02-27 | 111.978 | 57.548  | <0.1    |
|             | 18:48:26   | 03:24:10   |         |         |         |
| TCA         | 2020-02-25 | 2020-02-28 | 110.236 | 55.692  | <0.1    |
|             | 18:55:11   | 02:53:28   |         |         |         |
| TCA         | 2020-02-25 | 2020-02-28 | 107.314 | 48.270  | <0.1    |
|             | 19:07:22   | 03:39:23   |         |         |         |
| TCA         | 2020-02-25 | 2020-02-26 | 111.719 | 53.837  | <0.1    |
|             | 19:14:07   | 20:12:25   |         |         |         |
| TCA         | 2020-02-25 | 2020-02-27 | 108.666 | 50.125  | <0.1    |
|             | 19:20:51   | 00:18:48   |         |         |         |
| TCA         | 2020-02-25 | 2020-02-28 | 113.450 | 61.259  | <0.1    |
|             | 19:27:37   | 02:46:42   |         |         |         |
| TCA         | 2020-02-25 | 2020-02-28 | 104.843 | 40.847  | <0.1    |
|             | 19:39:46   | 03:51:29   |         |         |         |
| TCA         | 2020-02-25 | 2020-02-28 | 107.709 | 42.703  | <0.1    |
|             | 19:46:32   | 03:00:27   |         |         |         |
| TCA         | 2020-02-25 | 2020-02-27 | 108.642 | 53.837  | <0.1    |
|             | 20:18:57   | 02:24:59   |         |         |         |
| TCA         | 2020-02-25 | 2020-02-28 | 114.874 | 66.826  | <0.1    |
|             | 20:25:42   | 04:05:02   |         |         |         |
| TCA         | 2020-02-25 | 2020-02-26 | 110.362 | 59.404  | <0.1    |
|             | 20:38:08   | 00:05:35   |         |         |         |
| TCA         | 2020-02-25 | 2020-02-28 | 106.832 | 46.414  | <0.1    |
|             | 21:31:26   | 03:19:10   |         |         |         |
| TCA         | 2020-02-25 | 2020-02-26 | 108.184 | 44.558  | <0.1    |
|             | 21:50:37   | 22:56:56   |         |         |         |
| TCA         | 2020-02-26 | 2020-02-26 | 109.479 | 46.414  | <0.1    |
|             | 18:34:49   | 20:51:36   |         |         |         |
| TCA         | 2020-02-26 | 2020-02-28 | 104.479 | 38.991  | <0.1    |
|             | 19:01:05   | 03:32:38   |         |         |         |
| TCA         | 2020-02-26 | 2020-02-28 | 107.259 | 40.847  | <0.1    |
|             | 19:26:42   | 03:58:18   |         |         |         |
| TCA         | 2020-02-26 | 2020-02-27 | 105.226 | 42.703  | <0.1    |
|             | 19:40:14   | 02:15:31   |         |         |         |
| TCA         | 2020-02-26 | 2020-02-28 | 104.528 | 37.136  | <0.1    |
|             | 21:04:30   | 03:25:53   |         |         |         |
| TCA         | 2020-02-27 | 2020-02-27 | 105.631 | 44.558  | <0.1    |
|             | 02:32:11   | 02:38:30   |         |         |         |
| -----       | -----      | -----      | -----   | -----   | -----   |
| TCH         | 2020-02-26 | 2020-02-28 | 84.550  | -3.202  | <0.1    |
|             | 00:25:44   | 02:17:30   |         |         |         |
| TCH         | 2020-02-26 | 2020-02-28 | 75.781  | -9.050  | <0.1    |
|             | 00:34:09   | 02:25:55   |         |         |         |
| TCH         | 2020-02-26 | 2020-02-28 | 81.356  | -7.232  | <0.1    |
|             | 00:39:14   | 02:30:07   |         |         |         |
| TCH         | 2020-02-26 | 2020-02-28 | 73.125  | -15.930 | <0.1    |
|             | 01:44:04   | 01:22:20   |         |         |         |
| TCH         | 2020-02-26 | 2020-02-28 | 99.300  | 13.161  | <0.1    |
|             | 02:19:26   | 04:06:51   |         |         |         |
| TCH         | 2020-02-26 | 2020-02-28 | 66.756  | -19.959 | <0.1    |
|             | 03:36:13   | 03:12:28   |         |         |         |
| TCH         | 2020-02-26 | 2020-02-28 | 67.617  | -18.141 | <0.1    |
|             | 03:44:38   | 03:25:56   |         |         |         |
| TCH         | 2020-02-26 | 2020-02-27 | 69.160  | -16.323 | <0.1    |
|             | 03:55:09   | 03:41:49   |         |         |         |
| TCH         | 2020-02-27 | 2020-02-28 | 72.371  | -12.686 | <0.1    |
|             | 00:51:09   | 02:54:56   |         |         |         |
| TCH         | 2020-02-27 | 2020-02-27 | 106.127 | 29.525  | <0.1    |
|             | 01:01:40   | 01:07:52   |         |         |         |
| TCH         | 2020-02-27 | 2020-02-28 | 83.216  | 3.202   | <0.1    |
|             | 01:36:43   | 01:31:15   |         |         |         |
| TCH         | 2020-02-27 | 2020-02-28 | 95.985  | 9.050   | <0.1    |
|             | 01:45:09   | 03:51:37   |         |         |         |
| TCH         | 2020-02-27 | 2020-02-27 | 78.489  | -11.343 | <0.1    |
|             | 01:53:34   | 01:57:40   |         |         |         |
| TCH         | 2020-02-27 | 2020-02-27 | 78.657  | -5.414  | <0.1    |
|             | 02:15:49   | 04:33:44   |         |         |         |
| TCH         | 2020-02-27 | 2020-02-28 | 71.055  | -16.323 | <0.1    |
|             | 02:48:25   | 02:48:37   |         |         |         |
| TCH         | 2020-02-27 | 2020-02-27 | 101.371 | 17.273  | <0.1    |
|             | 04:01:10   | 04:07:23   |         |         |         |
| TCH         | 2020-02-27 | 2020-02-28 | 75.801  | -7.232  | <0.1    |
|             | 04:20:40   | 04:11:03   |         |         |         |
| TCH         | 2020-02-27 | 2020-02-27 | 72.200  | -14.505 | <0.1    |
|             | 04:51:37   | 05:04:24   |         |         |         |
| TCH         | 2020-02-27 | 2020-02-28 | 94.148  | 9.132   | <0.1    |
|             | 05:05:35   | 02:50:44   |         |         |         |
| TCH         | 2020-02-28 | 2020-02-28 | 69.521  | -18.141 | <0.1    |
|             | 00:50:14   | 03:06:09   |         |         |         |
| TCH         | 2020-02-28 | 2020-02-28 | 78.648  | -3.595  | <0.1    |
|             | 01:42:13   | 01:50:32   |         |         |         |
| -----       | -----      | -----      | -----   | -----   | -----   |
| TRE         | 2020-02-25 | 2020-02-26 | 98.571  | 16.364  | <0.1    |
|             | 17:56:09   | 20:08:55   |         |         |         |
| TRE         | 2020-02-25 | 2020-02-26 | 96.279  | 12.273  | <0.1    |
|             | 18:07:07   | 17:33:36   |         |         |         |
| TRE         | 2020-02-26 | 2020-02-26 | 98.182  | 28.636  | <0.1    |
|             | 18:50:22   | 18:52:22   |         |         |         |
| TRE         | 2020-02-26 | 2020-02-26 | 107.027 | 32.727  | <0.1    |
|             | 19:22:28   | 19:28:50   |         |         |         |
| TRE         | 2020-02-26 | 2020-02-26 | 78.621  | -8.182  | <0.1    |
|             | 20:20:08   | 20:26:30   |         |         |         |
| TRE         | 2020-02-26 | 2020-02-26 | 81.818  | 0.000   | <0.1    |
|             | 20:32:34   | 20:38:50   |         |         |         |
+-------------+------------+------------+---------+---------+---------+

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.

These observations cover about 9.2% of the cumulative probability of 
the LALInference skymap created on 2020-02-26 16:55:29 (UTC).


The coverage map is available at: 
https://grandma-
owncloud.lal.in2p3.fr/index.php/s/XgtMhPRxcyL09gR/download?path=%2F&files=GRANDMA_S200225q_1583068540.svg

No significant transient candidates were found during our low latency 
analysis [2,3].

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 spectrometry capabilities for Time-
domain Astronomy [2](https://grandma.lal.in2p3.fr/).

Details on the different telescopes are available on the GRANDMA web 
pages.

[1] M. W Coughlin et al., MNRAS 2019, https://doi.org/10.1093/mnras/stz2485
[2] S. Antier et al., MNRAS 2019, https://doi.org/10.1093/mnras/stz3142
[3] K. Noysena et al., ApJ 2019, arXiv:1910.02770
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