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GCN Circular 26361

Subject
LIGO/Virgo S191204r: No significant candidates in FRAM-TAROT-GRANDMA observations.
Date
2019-12-06T09:36:03Z (4 years ago)
From
Tatyana Sadibekova at AIM-CEA Saclay <tatyana.sadibekova@cea.fr>
T. Sadibekova (AIM-CEA), S. Beradze (Iliauni), D. Coward (OzGrav-UWA), C. 
Lachaud (APC), M. Boer (Artemis), N. Christensen (Artemis), L. Eymar 
(Artemis), S. Karpov, M. Masek, M. Prouza (FZU), A. Klotz (IRAP), K. 
Noysena (Artemis, IRAP), S. Antier (APC), A. Coleiro (APC), D. Corre 
(LAL), M. Coughlin (Caltech), J.G. Ducoin (LAL), B. Gendre (OzGrav-UWA), 
P. Hello (LAL), D. A. Kann (HETH/IAA-CSIC), N. Kochiashvili (Iliauni), 
N. Leroy (LAL), C. Thoene (HETH/IAA-CSIC), D. Turpin (NAOC), X. Wang (THU)

report on behalf of the FRAM network, TAROT network and GRANDMA 
collaboration:

We performed tiled observations of the LIGO/Virgo S191204r event with the 
FRAM-Auger, TAROT-Reunion (TRE), TAROT-Calern (TCA) and TAROT-Chili (TCH) 
telescopes, operating in the R-band for FRAM and Clear for TAROT, located 
respectively at Pierre Auger Observatory (Malargue, Argentina), Les Makes 
Astronomical Observatory, the Cote d'Azur Observatory and La Silla ESO 
(LaS/ESO).

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 magnitude (AB mag) for a given exposure in 
seconds:
+-------------+---------+----------+-----------+------------+
| Telescope   | Delay   | Filter   | f.o.v.    | Limiting   |
|             | [min]   |          | [deg]     | Mag.       |
|-------------+---------+----------+-----------+------------|
| FRAM-Auger  | 446     |    R     | 1.0 x 1.0 | 18.0 (60s) |
| TCA         | 53      |  Clear   | 1.9 x 1.9 | 18.0 (60s) |
| TCH         | 451     |  Clear   | 1.9 x 1.9 | 18.0 (60s) |
| TRE         | 60      |  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  | 2019-12-05 | 2019-12-05 | 101.168 | -42.324 | <0.1    |
|             | 00:40:35   | 00:45:02   |         |         |         |
| FRAM-Auger  | 2019-12-05 | 2019-12-05 | 102.482 | -42.324 | <0.1    |
|             | 00:45:37   | 00:50:04   |         |         |         |
| FRAM-Auger  | 2019-12-05 | 2019-12-05 | 94.532  | -41.351 | <0.1    |
|             | 00:50:42   | 00:55:09   |         |         |         |
| FRAM-Auger  | 2019-12-05 | 2019-12-05 | 95.827  | -41.351 | <0.1    |
|             | 00:55:44   | 01:00:11   |         |         |         |
| FRAM-Auger  | 2019-12-05 | 2019-12-05 | 99.854  | -42.324 | <0.1    |
|             | 01:00:47   | 01:05:14   |         |         |         |
| FRAM-Auger  | 2019-12-05 | 2019-12-05 | 103.796 | -42.324 | <0.1    |
|             | 01:05:50   | 01:10:17   |         |         |         |
| FRAM-Auger  | 2019-12-05 | 2019-12-05 | 91.915  | -40.378 | <0.1    |
|             | 01:10:54   | 01:15:21   |         |         |         |
| FRAM-Auger  | 2019-12-05 | 2019-12-05 | 98.540  | -42.324 | <0.1    |
|             | 01:15:57   | 01:20:24   |         |         |         |
| FRAM-Auger  | 2019-12-05 | 2019-12-05 | 90.638  | -40.378 | <0.1    |
|             | 01:21:00   | 01:25:27   |         |         |         |
| FRAM-Auger  | 2019-12-05 | 2019-12-05 | 97.122  | -41.351 | <0.1    |
|             | 01:26:04   | 01:30:31   |         |         |         |
| FRAM-Auger  | 2019-12-05 | 2019-12-05 | 108.000 | -43.297 | <0.1    |
|             | 01:31:09   | 01:35:36   |         |         |         |
| FRAM-Auger  | 2019-12-05 | 2019-12-05 | 109.333 | -43.297 | <0.1    |
|             | 01:36:11   | 01:40:37   |         |         |         |
| FRAM-Auger  | 2019-12-05 | 2019-12-05 | 93.237  | -41.351 | <0.1    |
|             | 01:41:15   | 01:45:42   |         |         |         |
| FRAM-Auger  | 2019-12-05 | 2019-12-05 | 106.667 | -43.297 | <0.1    |
|             | 01:46:20   | 01:50:47   |         |         |         |
| FRAM-Auger  | 2019-12-05 | 2019-12-05 | 110.667 | -43.297 | <0.1    |
|             | 01:51:23   | 01:55:50   |         |         |         |
| FRAM-Auger  | 2019-12-05 | 2019-12-05 | 46.703  | -2.432  | <0.1    |
|             | 01:56:32   | 02:00:59   |         |         |         |
| FRAM-Auger  | 2019-12-05 | 2019-12-05 | 112.000 | -43.297 | <0.1    |
|             | 02:01:42   | 02:06:08   |         |         |         |
| FRAM-Auger  | 2019-12-05 | 2019-12-05 | 89.362  | -40.378 | <0.1    |
|             | 02:06:47   | 02:11:14   |         |         |         |
| FRAM-Auger  | 2019-12-05 | 2019-12-05 | 88.112  | -39.405 | <0.1    |
|             | 02:11:50   | 02:16:16   |         |         |         |
| FRAM-Auger  | 2019-12-05 | 2019-12-05 | 98.417  | -41.351 | <0.1    |
|             | 02:16:53   | 02:21:20   |         |         |         |
| -----       | -----      | -----      | -----   | -----   | -----   |
| TCA         | 2019-12-04 | 2019-12-04 | 52.500  | -9.256  | <0.1    |
|             | 18:07:48   | 22:29:08   |         |         |         |
| TCA         | 2019-12-04 | 2019-12-05 | 37.174  | 19.485  | <0.1    |
|             | 18:14:34   | 00:35:54   |         |         |         |
| TCA         | 2019-12-04 | 2019-12-04 | 40.531  | 13.012  | <0.1    |
|             | 18:21:19   | 18:27:38   |         |         |         |
| TCA         | 2019-12-04 | 2019-12-05 | 46.867  | -7.445  | <0.1    |
|             | 18:33:44   | 01:25:19   |         |         |         |
| TCA         | 2019-12-04 | 2019-12-05 | 35.627  | 16.248  | <0.1    |
|             | 18:40:29   | 03:01:14   |         |         |         |
| TCA         | 2019-12-04 | 2019-12-04 | 36.751  | 21.340  | <0.1    |
|             | 18:47:14   | 18:53:33   |         |         |         |
| TCA         | 2019-12-04 | 2019-12-05 | 31.777  | 26.002  | <0.1    |
|             | 18:59:40   | 01:50:44   |         |         |         |
| TCA         | 2019-12-04 | 2019-12-05 | 32.153  | 27.857  | <0.1    |
|             | 19:13:09   | 02:48:18   |         |         |         |
| TCA         | 2019-12-04 | 2019-12-05 | 53.833  | -19.009 | <0.1    |
|             | 19:54:21   | 00:08:39   |         |         |         |
| TCA         | 2019-12-04 | 2019-12-05 | 48.000  | -0.928  | <0.1    |
|             | 20:56:24   | 01:44:10   |         |         |         |
| TCA         | 2019-12-04 | 2019-12-04 | 31.579  | 29.713  | <0.1    |
|             | 21:22:19   | 21:28:38   |         |         |         |
| TCA         | 2019-12-04 | 2019-12-05 | 32.862  | 22.290  | <0.1    |
|             | 21:36:08   | 02:23:03   |         |         |         |
| TCA         | 2019-12-04 | 2019-12-05 | 41.986  | 0.928   | <0.1    |
|             | 21:48:14   | 02:36:38   |         |         |         |
| TCA         | 2019-12-04 | 2019-12-05 | 35.248  | 25.527  | <0.1    |
|             | 22:01:44   | 00:19:39   |         |         |         |
| TCA         | 2019-12-04 | 2019-12-04 | 52.929  | -15.298 | 0.4     |
|             | 22:16:06   | 22:22:26   |         |         |         |
| TCA         | 2019-12-04 | 2019-12-04 | 62.133  | -21.340 | <0.1    |
|             | 23:21:24   | 23:27:43   |         |         |         |
| TCA         | 2019-12-04 | 2019-12-04 | 57.849  | -23.671 | 0.1     |
|             | 23:44:59   | 23:46:59   |         |         |         |
| TCA         | 2019-12-05 | 2019-12-05 | 38.221  | 9.300   | <0.1    |
|             | 02:23:34   | 02:29:53   |         |         |         |
| -----       | -----      | -----      | -----   | -----   | -----   |
| TCH         | 2019-12-05 | 2019-12-05 | 86.410  | -38.616 | <0.1    |
|             | 00:46:01   | 08:22:19   |         |         |         |
| TCH         | 2019-12-05 | 2019-12-05 | 69.116  | -30.868 | 5.9     |
|             | 00:52:47   | 05:59:04   |         |         |         |
| TCH         | 2019-12-05 | 2019-12-05 | 60.177  | -21.777 | 0.3     |
|             | 00:59:33   | 08:31:31   |         |         |         |
| TCH         | 2019-12-05 | 2019-12-05 | 100.458 | -43.595 | <0.1    |
|             | 01:11:59   | 06:16:10   |         |         |         |
| TCH         | 2019-12-05 | 2019-12-05 | 68.671  | -29.050 | 1.1     |
|             | 01:18:46   | 06:25:17   |         |         |         |
| TCH         | 2019-12-05 | 2019-12-05 | 59.669  | -23.595 | 0.3     |
|             | 01:25:31   | 04:01:49   |         |         |         |
| TCH         | 2019-12-05 | 2019-12-05 | 36.000  | 18.223  | <0.1    |
|             | 01:37:59   | 06:44:29   |         |         |         |
| TCH         | 2019-12-05 | 2019-12-05 | 88.733  | -38.141 | <0.1    |
|             | 01:44:41   | 06:51:15   |         |         |         |
| TCH         | 2019-12-05 | 2019-12-05 | 35.236  | 20.041  | <0.1    |
|             | 01:51:26   | 04:27:57   |         |         |         |
| TCH         | 2019-12-05 | 2019-12-05 | 69.398  | -32.686 | 4.7     |
|             | 02:03:49   | 07:10:08   |         |         |         |
| TCH         | 2019-12-05 | 2019-12-05 | 60.000  | -19.959 | <0.1    |
|             | 02:10:36   | 07:12:38   |         |         |         |
| TCH         | 2019-12-05 | 2019-12-05 | 71.226  | -30.000 | 1.6     |
|             | 02:29:44   | 07:36:04   |         |         |         |
| TCH         | 2019-12-05 | 2019-12-05 | 120.105 | -44.070 | <0.1    |
|             | 02:36:31   | 07:42:49   |         |         |         |
| TCH         | 2019-12-05 | 2019-12-05 | 33.337  | 25.495  | <0.1    |
|             | 02:43:21   | 05:19:38   |         |         |         |
| TCH         | 2019-12-05 | 2019-12-05 | 134.460 | -39.959 | <0.1    |
|             | 04:47:22   | 07:21:31   |         |         |         |
| TCH         | 2019-12-05 | 2019-12-05 | 40.883  | 10.950  | <0.1    |
|             | 06:31:25   | 06:35:34   |         |         |         |
| TCH         | 2019-12-05 | 2019-12-05 | 137.982 | -38.616 | <0.1    |
|             | 07:49:22   | 07:55:40   |         |         |         |
| -----       | -----      | -----      | -----   | -----   | -----   |
| TRE         | 2019-12-04 | 2019-12-04 | 49.655  | -8.182  | 1.2     |
|             | 18:14:49   | 22:36:01   |         |         |         |
| TRE         | 2019-12-04 | 2019-12-04 | 77.143  | -36.818 | 39.8    |
|             | 19:18:16   | 19:24:38   |         |         |         |
| TRE         | 2019-12-04 | 2019-12-04 | 65.455  | -28.636 | 1.0     |
|             | 19:33:42   | 19:37:50   |         |         |         |
| TRE         | 2019-12-04 | 2019-12-04 | 109.091 | -40.909 | <0.1    |
|             | 19:43:46   | 19:50:07   |         |         |         |
| TRE         | 2019-12-04 | 2019-12-05 | 50.233  | -12.273 | 1.1     |
|             | 19:57:02   | 00:17:35   |         |         |         |
| TRE         | 2019-12-04 | 2019-12-04 | 120.000 | -40.909 | <0.1    |
|             | 20:09:17   | 20:15:33   |         |         |         |
| TRE         | 2019-12-04 | 2019-12-04 | 125.455 | -40.909 | <0.1    |
|             | 20:22:32   | 20:28:54   |         |         |         |
| TRE         | 2019-12-04 | 2019-12-04 | 38.571  | 16.364  | <0.1    |
|             | 20:34:53   | 20:41:14   |         |         |         |
| TRE         | 2019-12-04 | 2019-12-04 | 45.000  | -4.091  | 0.4     |
|             | 20:54:02   | 21:00:18   |         |         |         |
| TRE         | 2019-12-04 | 2019-12-04 | 130.909 | -40.909 | <0.1    |
|             | 21:06:59   | 21:13:20   |         |         |         |
| TRE         | 2019-12-04 | 2019-12-04 | 92.727  | -40.909 | <0.1    |
|             | 22:16:26   | 22:22:42   |         |         |         |
| TRE         | 2019-12-04 | 2019-12-04 | 82.286  | -36.818 | 12.4    |
|             | 22:41:57   | 22:48:13   |         |         |         |
| TRE         | 2019-12-04 | 2019-12-04 | 72.973  | -32.727 | 14.4    |
|             | 23:07:43   | 23:14:04   |         |         |         |
| TRE         | 2019-12-04 | 2019-12-04 | 63.000  | -24.545 | 0.6     |
|             | 23:26:41   | 23:32:57   |         |         |         |
| TRE         | 2019-12-04 | 2019-12-04 | 54.419  | -12.273 | 0.4     |
|             | 23:52:11   | 23:58:33   |         |         |         |
+-------------+------------+------------+---------+---------+---------+

TStart and TEnd refer 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 84% of the cumulative probability of the 
BAYESTAR skymap created on 2019-12-04 18:02:07 (UTC).


The coverage map is available at: 
https://grandma-owncloud.lal.in2p3.fr/index.php/s/PqlwSoGEclSr2VJ

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, doi.org/10.1093/mnras/stz2485
[2] S. Antier et al., MNRAS 2019, arXiv:1910.11261
[3] K. Noysena et al., ApJ 2019, arXiv:1910.02770
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