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GCN Circular 26820

Subject
LIGO/Virgo S200115j : No significant candidates in TAROT - FRAM - GRANDMA observations
Date
2020-01-19T21:10:56Z (4 years ago)
From
Kanthanakorn Noysena at GRANDMA-n-TAROT <kanthanakorn.noysena@irap.omp.eu>
K. Noysena (Artemis, IRAP), S. Antier (APC), M. Blazek (HETH/IAA-CSIC),
P. Hello (IJCLab), E. Howell (OzGrav-UWA), Karpov (FZU),
M. Masek (FZU), M. Prouza (FZU), M. Boer (Artemis),
N. Christensen (Artemis), L. Eymar (Artemis), A. Klotz (IRAP),
A. Coleiro (APC), D. Corre (IJCLab), M. Coughlin (UMN),
D. Coward (OzGrav-UWA), J.G. Ducoin (IJCLab), 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 S200115j event
(#GCN26759) 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  | 1247    | R        | 1.0 x 1.0   | 18.0 (60s) |
| FRAM-CTA-N  | 916     | R        | 0.45 x 0.45 | 17.0 (90s) |
| TCA         | 771     | Clear    | 1.9 x 1.9   | 18.0 (60s) |
| TCH         | 16      | Clear    | 1.9 x 1.9   | 18.0 (60s) |
| TRE         | 704     | 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  | 2020-01-16 | 2020-01-16 | 43.784  | 2.432   | 0.1     |
|             | 01:09:24   | 01:13:51   |         |         |         |
| FRAM-Auger  | 2020-01-16 | 2020-01-16 | 44.878  | 5.351   | 0.1     |
|             | 01:14:29   | 01:18:56   |         |         |         |
| FRAM-Auger  | 2020-01-16 | 2020-01-16 | 44.757  | 4.378   | <0.1    |
|             | 01:19:31   | 01:23:58   |         |         |         |
| FRAM-Auger  | 2020-01-16 | 2020-01-16 | 43.666  | 1.460   | <0.1    |
|             | 01:24:35   | 01:29:02   |         |         |         |
| FRAM-Auger  | 2020-01-16 | 2020-01-16 | 43.784  | 3.405   | 0.2     |
|             | 01:29:38   | 01:34:05   |         |         |         |
| FRAM-Auger  | 2020-01-16 | 2020-01-16 | 42.695  | 0.486   | <0.1    |
|             | 01:34:40   | 01:39:07   |         |         |         |
| FRAM-Auger  | 2020-01-16 | 2020-01-16 | 42.695  | -0.486  | <0.1    |
|             | 01:39:44   | 01:44:11   |         |         |         |
| FRAM-Auger  | 2020-01-16 | 2020-01-16 | 44.757  | 3.405   | <0.1    |
|             | 01:44:49   | 01:49:16   |         |         |         |
| FRAM-Auger  | 2020-01-16 | 2020-01-16 | 42.695  | 1.460   | 0.1     |
|             | 01:49:52   | 01:54:19   |         |         |         |
| FRAM-Auger  | 2020-01-16 | 2020-01-16 | 41.725  | -1.460  | <0.1    |
|             | 01:54:55   | 01:59:22   |         |         |         |
| FRAM-Auger  | 2020-01-16 | 2020-01-16 | 43.666  | 0.486   | <0.1    |
|             | 01:59:58   | 02:04:25   |         |         |         |
| FRAM-Auger  | 2020-01-16 | 2020-01-16 | 44.757  | 2.432   | <0.1    |
|             | 02:05:03   | 02:09:30   |         |         |         |
| FRAM-Auger  | 2020-01-16 | 2020-01-16 | 42.811  | 2.432   | 0.2     |
|             | 02:10:07   | 02:14:34   |         |         |         |
| FRAM-Auger  | 2020-01-16 | 2020-01-16 | 43.784  | 4.378   | 0.2     |
|             | 02:15:10   | 02:19:38   |         |         |         |
| FRAM-Auger  | 2020-01-16 | 2020-01-16 | 41.725  | -0.486  | <0.1    |
|             | 02:20:14   | 02:24:41   |         |         |         |
| FRAM-Auger  | 2020-01-16 | 2020-01-16 | 41.838  | -2.432  | <0.1    |
|             | 02:25:17   | 02:29:44   |         |         |         |
| FRAM-Auger  | 2020-01-16 | 2020-01-16 | 45.730  | 4.378   | <0.1    |
|             | 02:30:20   | 02:34:47   |         |         |         |
| FRAM-Auger  | 2020-01-16 | 2020-01-16 | 42.695  | -1.460  | <0.1    |
|             | 02:35:23   | 02:39:50   |         |         |         |
| FRAM-Auger  | 2020-01-16 | 2020-01-16 | 40.865  | -3.405  | <0.1    |
|             | 02:40:25   | 02:44:52   |         |         |         |
| FRAM-Auger  | 2020-01-16 | 2020-01-16 | 45.978  | 6.324   | <0.1    |
|             | 02:45:30   | 02:49:57   |         |         |         |
| -----       | -----      | -----      | -----   | -----   | -----   |
| FRAM-CTA-N  | 2020-01-15 | 2020-01-15 | 42.604  | 0.225   | <0.1    |
|             | 19:38:25   | 19:42:31   |         |         |         |
| FRAM-CTA-N  | 2020-01-15 | 2020-01-15 | 43.041  | 0.225   | <0.1    |
|             | 19:42:46   | 19:46:52   |         |         |         |
| FRAM-CTA-N  | 2020-01-15 | 2020-01-15 | 43.530  | 2.846   | <0.1    |
|             | 19:47:07   | 19:51:13   |         |         |         |
| FRAM-CTA-N  | 2020-01-15 | 2020-01-15 | 43.967  | 3.720   | <0.1    |
|             | 19:51:33   | 19:55:39   |         |         |         |
| FRAM-CTA-N  | 2020-01-15 | 2020-01-15 | 43.477  | 1.099   | <0.1    |
|             | 19:56:10   | 20:00:15   |         |         |         |
| FRAM-CTA-N  | 2020-01-15 | 2020-01-15 | 44.405  | 2.846   | <0.1    |
|             | 20:00:31   | 20:04:37   |         |         |         |
| FRAM-CTA-N  | 2020-01-15 | 2020-01-15 | 43.967  | 2.846   | <0.1    |
|             | 20:04:57   | 20:09:03   |         |         |         |
| FRAM-CTA-N  | 2020-01-15 | 2020-01-15 | 44.459  | 4.157   | <0.1    |
|             | 20:09:18   | 20:13:24   |         |         |         |
| FRAM-CTA-N  | 2020-01-15 | 2020-01-15 | 43.041  | 1.099   | <0.1    |
|             | 20:13:40   | 20:17:46   |         |         |         |
| FRAM-CTA-N  | 2020-01-15 | 2020-01-15 | 44.405  | 3.720   | <0.1    |
|             | 20:18:01   | 20:22:07   |         |         |         |
| FRAM-CTA-N  | 2020-01-15 | 2020-01-15 | 43.477  | 1.536   | <0.1    |
|             | 20:22:22   | 20:26:28   |         |         |         |
| FRAM-CTA-N  | 2020-01-15 | 2020-01-15 | 43.914  | 2.409   | <0.1    |
|             | 20:26:49   | 20:30:55   |         |         |         |
| FRAM-CTA-N  | 2020-01-15 | 2020-01-15 | 43.477  | 1.973   | <0.1    |
|             | 20:31:09   | 20:35:15   |         |         |         |
| FRAM-CTA-N  | 2020-01-15 | 2020-01-15 | 43.914  | 1.973   | <0.1    |
|             | 20:35:30   | 20:39:36   |         |         |         |
| FRAM-CTA-N  | 2020-01-15 | 2020-01-15 | 43.041  | 1.536   | <0.1    |
|             | 20:39:56   | 20:44:02   |         |         |         |
| FRAM-CTA-N  | 2020-01-15 | 2020-01-15 | 43.477  | 2.409   | <0.1    |
|             | 20:44:17   | 20:48:23   |         |         |         |
| FRAM-CTA-N  | 2020-01-15 | 2020-01-15 | 42.604  | -0.212  | <0.1    |
|             | 20:48:43   | 20:52:49   |         |         |         |
| FRAM-CTA-N  | 2020-01-15 | 2020-01-15 | 43.041  | 1.973   | <0.1    |
|             | 20:53:04   | 20:57:10   |         |         |         |
| FRAM-CTA-N  | 2020-01-15 | 2020-01-15 | 44.897  | 4.594   | <0.1    |
|             | 20:57:25   | 21:01:31   |         |         |         |
| FRAM-CTA-N  | 2020-01-15 | 2020-01-15 | 44.897  | 4.157   | <0.1    |
|             | 21:01:45   | 21:05:51   |         |         |         |
| -----       | -----      | -----      | -----   | -----   | -----   |
| TCA         | 2020-01-15 | 2020-01-18 | 41.565  | -1.833  | 0.2     |
|             | 17:13:13   | 17:50:17   |         |         |         |
| TCA         | 2020-01-15 | 2020-01-19 | 43.411  | 3.733   | 0.6     |
|             | 17:19:57   | 18:56:02   |         |         |         |
| TCA         | 2020-01-15 | 2020-01-19 | 40.825  | -3.689  | 0.2     |
|             | 17:26:42   | 19:02:48   |         |         |         |
| TCA         | 2020-01-15 | 2020-01-19 | 61.353  | 40.372  | 0.2     |
|             | 17:39:07   | 01:45:45   |         |         |         |
| TCA         | 2020-01-15 | 2020-01-19 | 63.019  | 42.703  | 0.2     |
|             | 17:45:52   | 19:21:58   |         |         |         |
| TCA         | 2020-01-15 | 2020-01-19 | 65.502  | 42.703  | <0.1    |
|             | 18:57:13   | 18:03:46   |         |         |         |
| TCA         | 2020-01-15 | 2020-01-19 | 43.411  | 1.878   | 0.4     |
|             | 19:30:32   | 18:36:52   |         |         |         |
| TCA         | 2020-01-15 | 2020-01-19 | 45.011  | 5.114   | 0.4     |
|             | 19:37:16   | 18:43:37   |         |         |         |
| TCA         | 2020-01-15 | 2020-01-19 | 149.185 | 70.538  | <0.1    |
|             | 20:02:59   | 19:09:33   |         |         |         |
| TCA         | 2020-01-15 | 2020-01-19 | 68.981  | 50.125  | 0.2     |
|             | 20:35:38   | 02:11:38   |         |         |         |
| TCA         | 2020-01-15 | 2020-01-19 | 64.479  | 46.414  | 0.3     |
|             | 21:21:03   | 17:57:02   |         |         |         |
| TCA         | 2020-01-15 | 2020-01-19 | 71.770  | 51.981  | 0.1     |
|             | 22:59:06   | 19:35:26   |         |         |         |
| TCA         | 2020-01-16 | 2020-01-19 | 74.796  | 53.837  | <0.1    |
|             | 02:14:06   | 20:16:13   |         |         |         |
| TCA         | 2020-01-16 | 2020-01-19 | 64.780  | 44.558  | 0.2     |
|             | 03:52:07   | 19:28:43   |         |         |         |
| TCA         | 2020-01-16 | 2020-01-19 | 71.719  | 53.837  | 0.2     |
|             | 04:31:07   | 17:37:52   |         |         |         |
| TCA         | 2020-01-16 | 2020-01-19 | 71.816  | 50.125  | <0.1    |
|             | 04:37:45   | 20:13:47   |         |         |         |
| TCA         | 2020-01-17 | 2020-01-19 | 69.132  | 48.270  | <0.1    |
|             | 00:12:06   | 19:47:51   |         |         |         |
| TCA         | 2020-01-17 | 2020-01-19 | 63.769  | 40.847  | <0.1    |
|             | 00:24:29   | 20:01:21   |         |         |         |
| TCA         | 2020-01-17 | 2020-01-19 | 67.126  | 46.414  | 0.1     |
|             | 20:18:19   | 19:54:37   |         |         |         |
| TCA         | 2020-01-18 | 2020-01-19 | 42.937  | 0.022   | 0.2     |
|             | 17:23:44   | 18:30:06   |         |         |         |
| -----       | -----      | -----      | -----   | -----   | -----   |
| TCH         | 2020-01-15 | 2020-01-19 | 44.367  | 3.677   | 0.4     |
|             | 04:39:08   | 03:34:39   |         |         |         |
| TCH         | 2020-01-15 | 2020-01-19 | 43.892  | 1.859   | 0.3     |
|             | 04:45:45   | 01:13:33   |         |         |         |
| TCH         | 2020-01-15 | 2020-01-19 | 42.083  | -1.777  | 0.2     |
|             | 04:58:16   | 01:25:58   |         |         |         |
| TCH         | 2020-01-15 | 2020-01-19 | 41.133  | -3.595  | 0.1     |
|             | 05:05:02   | 04:02:44   |         |         |         |
| TCH         | 2020-01-15 | 2020-01-18 | 258.202 | -27.707 | <0.1    |
|             | 08:28:57   | 09:01:24   |         |         |         |
| TCH         | 2020-01-16 | 2020-01-16 | 45.226  | 5.495   | 0.4     |
|             | 00:43:42   | 00:50:01   |         |         |         |
| TCH         | 2020-01-16 | 2020-01-18 | 37.990  | -0.909  | 0.2     |
|             | 02:00:58   | 04:07:19   |         |         |         |
| TCH         | 2020-01-16 | 2020-01-19 | 49.700  | 15.455  | <0.1    |
|             | 02:13:57   | 02:50:20   |         |         |         |
| TCH         | 2020-01-16 | 2020-01-19 | 34.783  | -12.686 | <0.1    |
|             | 02:20:44   | 02:54:55   |         |         |         |
| TCH         | 2020-01-16 | 2020-01-18 | 47.825  | 15.455  | 0.2     |
|             | 02:27:29   | 04:33:51   |         |         |         |
| TCH         | 2020-01-16 | 2020-01-19 | 42.558  | 0.041   | 0.3     |
|             | 02:53:47   | 03:25:43   |         |         |         |
| TCH         | 2020-01-16 | 2020-01-16 | 259.916 | -25.414 | 0.5     |
|             | 08:32:41   | 08:39:00   |         |         |         |
| TCH         | 2020-01-16 | 2020-01-19 | 270.384 | -36.323 | 0.5     |
|             | 08:39:26   | 09:13:34   |         |         |         |
| TCH         | 2020-01-16 | 2020-01-18 | 259.603 | -23.595 | 0.4     |
|             | 08:52:04   | 08:24:23   |         |         |         |
| TCH         | 2020-01-18 | 2020-01-19 | 268.120 | -36.323 | 0.1     |
|             | 08:15:34   | 09:18:09   |         |         |         |
| TCH         | 2020-01-18 | 2020-01-18 | 257.786 | -21.777 | 0.2     |
|             | 08:41:36   | 08:43:36   |         |         |         |
| TCH         | 2020-01-18 | 2020-01-18 | 271.111 | -34.505 | 1.3     |
|             | 08:52:39   | 08:54:39   |         |         |         |
| -----       | -----      | -----      | -----   | -----   | -----   |
| TRE         | 2020-01-15 | 2020-01-16 | 50.233  | 12.273  | 0.2     |
|             | 16:06:14   | 17:12:32   |         |         |         |
| TRE         | 2020-01-15 | 2020-01-16 | 61.714  | 36.818  | 0.3     |
|             | 16:31:50   | 17:38:22   |         |         |         |
| TRE         | 2020-01-15 | 2020-01-16 | 49.091  | 4.091   | <0.1    |
|             | 16:45:02   | 17:51:25   |         |         |         |
| TRE         | 2020-01-15 | 2020-01-16 | 56.104  | 28.636  | 0.3     |
|             | 17:31:22   | 18:35:33   |         |         |         |
| TRE         | 2020-01-15 | 2020-01-16 | 45.000  | 4.091   | 1.5     |
|             | 19:24:18   | 20:30:33   |         |         |         |
| TRE         | 2020-01-15 | 2020-01-15 | 40.909  | 0.000   | 2.0     |
|             | 19:37:21   | 19:43:37   |         |         |         |
| TRE         | 2020-01-15 | 2020-01-15 | 46.047  | 12.273  | 1.8     |
|             | 20:15:43   | 20:22:00   |         |         |         |
| TRE         | 2020-01-16 | 2020-01-16 | 41.379  | -8.182  | <0.1    |
|             | 16:08:50   | 16:10:50   |         |         |         |
| TRE         | 2020-01-16 | 2020-01-16 | 56.571  | 36.818  | 1.1     |
|             | 18:10:07   | 18:16:23   |         |         |         |
| TRE         | 2020-01-16 | 2020-01-16 | 45.000  | 0.000   | 0.3     |
|             | 20:49:41   | 20:51:41   |         |         |         |
+-------------+------------+------------+---------+---------+---------+

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 13.2% of the cumulative probability of
the LALInference skymap created on 2020-01-17 13:54:56
(UTC).


The coverage map is available at:
https://grandma-owncloud.lal.in2p3.fr/index.php/s/XgtMhPRxcyL09gR/download?path=%2F&files=GRANDMA_S200115j_1579467054.png


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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