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GCN Circular 27116

Subject
LIGO/Virgo S200213t : No significant candidates in FRAM - OAJ - TAROT - GRANDMA observations
Date
2020-02-17T20:40:23Z (4 years ago)
From
Martin Blazek at HETH/IAA-CSIC <alf@iaa.es>
M. Blazek (HETH/IAA-CSIC), S. Agayeva (SHAO), A. Baransky (Kyiv Uni),
P. Hello (IJCLab), E. Howell (OzGrav-UWA),  (FZU), K. Bensch
(HETH/IAA-CSIC), M. Boer (Artemis), N. Christensen (Artemis), L. Eymar
  (Artemis), J. Feliciano Ag����-Fern��ndez (HETH/IAA-CSIC), L. Izzo
(HETH/IAA-CSIC), D. A. Kann (HETH/IAA-CSIC), S. Karpov (FZU), M. Prouza
(FZU), A. Klotz (IRAP), M. Masek (FZU), K. Noysena (Artemis, IRAP),
C. Thoene (HETH/IAA-CSIC), A. Ugarte Postigo (IAA/CSIC, DARK/NBI),
S. Antier (APC), A. Coleiro (APC), D. Corre (IJCLab), M. Coughlin (UMN),
D. Coward (Oz   Grav-UWA), J.G. Ducoin (IJCLab), B. Gendre (OzGrav-UWA),
N. Kochiashvili (Iliauni), C. Lachaud (APC), N. Leroy (IJCLab),
D. Turpin (AIM-CEA), X. Wang (THU)

report on behalf of the FRAM, TAROT, HETH and GRANDMA collaborations.

We performed tiled observations of LIGO/Virgo S200213t event with the
FRAM-Auger, FRAM-CTA-N, OAJ-T80, 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. OAJ is located at
Javalambre observatory. 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  | 1220    | R        | 1.0 x 1.0   | 18.0 (60s)  |
| FRAM-CTA-N  | 932     | R        | 0.45 x 0.45 | 17.0 (90s)  |
| OAJ         | 898     | r        | 1.4 x 1.4   | 21.0 (180s) |
| TCA         | 26      | Clear    | 1.9 x 1.9   | 18.0 (60s)  |
| TCH         | 2703    | Clear    | 1.9 x 1.9   | 18.0 (60s)  |
| TRE         | 717     | 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  | 2020-02-14 | 2020-02-14 | 31.705  | 18.000  | <0.1    |
|             | 00:29:55   | 00:34:22   |         |         |         |
| FRAM-Auger  | 2020-02-14 | 2020-02-14 | 31.886  | 18.973  | <0.1    |
|             | 00:34:58   | 00:39:25   |         |         |         |
| FRAM-Auger  | 2020-02-14 | 2020-02-14 | 32.914  | 18.973  | <0.1    |
|             | 00:40:00   | 00:44:27   |         |         |         |
| FRAM-Auger  | 2020-02-14 | 2020-02-14 | 35.581  | 21.892  | <0.1    |
|             | 00:45:03   | 00:49:30   |         |         |         |
| FRAM-Auger  | 2020-02-14 | 2020-02-14 | 36.416  | 20.919  | <0.1    |
|             | 00:50:06   | 00:54:33   |         |         |         |
| FRAM-Auger  | 2020-02-14 | 2020-02-14 | 33.943  | 18.973  | <0.1    |
|             | 00:55:08   | 00:59:35   |         |         |         |
| FRAM-Auger  | 2020-02-14 | 2020-02-14 | 34.971  | 18.973  | <0.1    |
|             | 01:00:11   | 01:04:38   |         |         |         |
| FRAM-Auger  | 2020-02-14 | 2020-02-14 | 32.727  | 18.000  | <0.1    |
|             | 01:05:14   | 01:09:41   |         |         |         |
| FRAM-Auger  | 2020-02-14 | 2020-02-14 | 35.376  | 20.919  | <0.1    |
|             | 01:10:16   | 01:14:43   |         |         |         |
| FRAM-Auger  | 2020-02-14 | 2020-02-14 | 31.525  | 17.027  | <0.1    |
|             | 01:15:19   | 01:19:46   |         |         |         |
| FRAM-Auger  | 2020-02-14 | 2020-02-14 | 32.542  | 17.027  | <0.1    |
|             | 01:20:23   | 01:24:50   |         |         |         |
| FRAM-Auger  | 2020-02-14 | 2020-02-14 | 35.172  | 19.946  | <0.1    |
|             | 01:25:27   | 01:29:54   |         |         |         |
| FRAM-Auger  | 2020-02-14 | 2020-02-14 | 36.628  | 21.892  | <0.1    |
|             | 01:30:31   | 01:34:58   |         |         |         |
| FRAM-Auger  | 2020-02-14 | 2020-02-14 | 28.156  | 15.081  | <0.1    |
|             | 01:35:37   | 01:40:04   |         |         |         |
| FRAM-Auger  | 2020-02-14 | 2020-02-14 | 30.168  | 15.081  | <0.1    |
|             | 01:40:41   | 01:45:08   |         |         |         |
| -----       | -----      | -----      | -----   | -----   | -----   |
| FRAM-CTA-N  | 2020-02-13 | 2020-02-13 | 16.074  | 54.837  | 0.2     |
|             | 19:41:53   | 19:45:59   |         |         |         |
| FRAM-CTA-N  | 2020-02-13 | 2020-02-13 | 17.005  | 55.273  | 0.2     |
|             | 19:46:14   | 19:50:20   |         |         |         |
| FRAM-CTA-N  | 2020-02-13 | 2020-02-13 | 19.382  | 57.021  | 0.2     |
|             | 19:50:36   | 19:54:42   |         |         |         |
| FRAM-CTA-N  | 2020-02-13 | 2020-02-13 | 16.829  | 54.837  | 0.2     |
|             | 19:55:02   | 19:59:08   |         |         |         |
| FRAM-CTA-N  | 2020-02-13 | 2020-02-13 | 18.926  | 56.147  | 0.2     |
|             | 19:59:23   | 20:03:28   |         |         |         |
| FRAM-CTA-N  | 2020-02-13 | 2020-02-13 | 15.009  | 53.963  | 0.2     |
|             | 20:03:44   | 20:07:50   |         |         |         |
| FRAM-CTA-N  | 2020-02-13 | 2020-02-13 | 18.584  | 57.021  | 0.2     |
|             | 20:08:06   | 20:12:12   |         |         |         |
| FRAM-CTA-N  | 2020-02-13 | 2020-02-13 | 17.584  | 54.837  | 0.2     |
|             | 20:12:27   | 20:16:33   |         |         |         |
| FRAM-CTA-N  | 2020-02-13 | 2020-02-13 | 15.749  | 53.963  | 0.2     |
|             | 20:16:48   | 20:20:54   |         |         |         |
| FRAM-CTA-N  | 2020-02-13 | 2020-02-13 | 18.147  | 56.147  | 0.2     |
|             | 20:21:10   | 20:25:16   |         |         |         |
| FRAM-CTA-N  | 2020-02-13 | 2020-02-13 | 16.488  | 53.963  | 0.2     |
|             | 20:25:31   | 20:29:37   |         |         |         |
| FRAM-CTA-N  | 2020-02-13 | 2020-02-13 | 17.368  | 56.147  | 0.2     |
|             | 20:29:51   | 20:33:57   |         |         |         |
| FRAM-CTA-N  | 2020-02-13 | 2020-02-13 | 16.242  | 55.273  | 0.2     |
|             | 20:34:11   | 20:38:17   |         |         |         |
| FRAM-CTA-N  | 2020-02-13 | 2020-02-13 | 19.706  | 56.147  | 0.2     |
|             | 20:38:38   | 20:42:44   |         |         |         |
| FRAM-CTA-N  | 2020-02-13 | 2020-02-13 | 16.589  | 56.147  | 0.2     |
|             | 20:42:59   | 20:47:05   |         |         |         |
| FRAM-CTA-N  | 2020-02-13 | 2020-02-13 | 17.767  | 55.273  | 0.2     |
|             | 20:47:19   | 20:51:24   |         |         |         |
| FRAM-CTA-N  | 2020-02-13 | 2020-02-13 | 17.227  | 53.963  | 0.2     |
|             | 20:51:38   | 20:55:44   |         |         |         |
| FRAM-CTA-N  | 2020-02-13 | 2020-02-13 | 15.319  | 54.612  | 0.2     |
|             | 20:55:59   | 21:00:05   |         |         |         |
| FRAM-CTA-N  | 2020-02-13 | 2020-02-13 | 18.338  | 54.837  | 0.2     |
|             | 21:00:20   | 21:04:25   |         |         |         |
| FRAM-CTA-N  | 2020-02-13 | 2020-02-13 | 18.530  | 55.273  | 0.2     |
|             | 21:04:40   | 21:08:45   |         |         |         |
| -----       | -----      | -----      | -----   | -----   | -----   |
| OAJ         | 2020-02-13 | 2020-02-13 | 16.471  | 54.545  | 1.7     |
|             | 19:08:37   | 19:13:37   |         |         |         |
| OAJ         | 2020-02-13 | 2020-02-13 | 17.027  | 55.909  | 1.6     |
|             | 19:14:05   | 19:19:05   |         |         |         |
| OAJ         | 2020-02-13 | 2020-02-13 | 20.140  | 57.273  | 1.6     |
|             | 19:19:33   | 19:24:33   |         |         |         |
| OAJ         | 2020-02-13 | 2020-02-13 | 19.459  | 55.909  | 1.5     |
|             | 19:27:28   | 19:32:28   |         |         |         |
| OAJ         | 2020-02-13 | 2020-02-13 | 15.949  | 53.182  | 1.5     |
|             | 19:32:58   | 19:37:58   |         |         |         |
| OAJ         | 2020-02-13 | 2020-02-13 | 18.823  | 54.545  | 1.4     |
|             | 19:38:27   | 19:43:27   |         |         |         |
| OAJ         | 2020-02-13 | 2020-02-13 | 17.622  | 57.273  | 1.4     |
|             | 19:43:55   | 19:48:55   |         |         |         |
| OAJ         | 2020-02-13 | 2020-02-13 | 14.118  | 54.545  | 1.3     |
|             | 19:53:24   | 19:58:24   |         |         |         |
| OAJ         | 2020-02-13 | 2020-02-13 | 13.671  | 53.182  | 1.3     |
|             | 19:58:51   | 20:03:51   |         |         |         |
| OAJ         | 2020-02-13 | 2020-02-13 | 18.228  | 53.182  | 1.3     |
|             | 20:04:21   | 20:09:21   |         |         |         |
| OAJ         | 2020-02-13 | 2020-02-13 | 15.460  | 51.818  | 1.2     |
|             | 20:11:32   | 20:16:32   |         |         |         |
| OAJ         | 2020-02-13 | 2020-02-13 | 21.022  | 58.636  | 1.2     |
|             | 20:17:00   | 20:22:00   |         |         |         |
| OAJ         | 2020-02-13 | 2020-02-13 | 22.657  | 57.273  | 1.1     |
|             | 20:24:59   | 20:29:59   |         |         |         |
| -----       | -----      | -----      | -----   | -----   | -----   |
| TCA         | 2020-02-13 | 2020-02-16 | 21.137  | 57.548  | 2.5     |
|             | 04:36:17   | 02:37:05   |         |         |         |
| TCA         | 2020-02-13 | 2020-02-16 | 17.772  | 57.548  | 2.3     |
|             | 04:43:25   | 22:43:29   |         |         |         |
| TCA         | 2020-02-13 | 2020-02-17 | 23.450  | 60.784  | 1.0     |
|             | 05:02:14   | 19:03:32   |         |         |         |
| TCA         | 2020-02-13 | 2020-02-16 | 13.258  | 53.837  | 2.0     |
|             | 19:11:15   | 05:31:22   |         |         |         |
| TCA         | 2020-02-13 | 2020-02-16 | 12.289  | 50.125  | 1.4     |
|             | 19:18:02   | 23:09:24   |         |         |         |
| TCA         | 2020-02-13 | 2020-02-16 | 17.483  | 50.125  | 1.3     |
|             | 19:24:46   | 23:16:14   |         |         |         |
| TCA         | 2020-02-13 | 2020-02-16 | 20.656  | 51.981  | 1.2     |
|             | 20:16:22   | 00:52:22   |         |         |         |
| TCA         | 2020-02-13 | 2020-02-17 | 23.665  | 53.837  | 1.0     |
|             | 20:23:06   | 19:10:13   |         |         |         |
| TCA         | 2020-02-13 | 2020-02-17 | 25.656  | 59.404  | 1.2     |
|             | 20:29:50   | 18:31:05   |         |         |         |
| TCA         | 2020-02-13 | 2020-02-15 | 11.859  | 48.270  | 1.0     |
|             | 20:48:51   | 20:25:06   |         |         |         |
| TCA         | 2020-02-13 | 2020-02-16 | 25.966  | 57.548  | 1.0     |
|             | 20:55:31   | 04:01:13   |         |         |         |
| TCA         | 2020-02-13 | 2020-02-16 | 14.408  | 57.548  | 0.9     |
|             | 21:14:43   | 04:20:41   |         |         |         |
| TCA         | 2020-02-13 | 2020-02-17 | 16.335  | 53.837  | 2.8     |
|             | 21:48:01   | 19:29:12   |         |         |         |
| TCA         | 2020-02-13 | 2020-02-17 | 20.236  | 55.692  | 2.6     |
|             | 21:54:46   | 19:33:43   |         |         |         |
| TCA         | 2020-02-14 | 2020-02-16 | 19.412  | 53.837  | 2.1     |
|             | 00:50:26   | 22:57:03   |         |         |         |
| TCA         | 2020-02-14 | 2020-02-17 | 18.597  | 59.404  | 1.2     |
|             | 03:52:33   | 18:24:22   |         |         |         |
| TCA         | 2020-02-14 | 2020-02-15 | 17.021  | 55.692  | 3.0     |
|             | 05:11:13   | 22:48:18   |         |         |         |
| TCA         | 2020-02-14 | 2020-02-15 | 14.586  | 48.270  | 1.0     |
|             | 21:36:19   | 19:33:46   |         |         |         |
| TCA         | 2020-02-14 | 2020-02-16 | 14.754  | 51.981  | 2.3     |
|             | 23:13:35   | 22:50:18   |         |         |         |
| TCA         | 2020-02-15 | 2020-02-16 | 24.764  | 55.692  | 1.0     |
|             | 00:12:07   | 05:26:49   |         |         |         |
| -----       | -----      | -----      | -----   | -----   | -----   |
| TCH         | 2020-02-15 | 2020-02-15 | 28.310  | 14.586  | <0.1    |
|             | 01:13:28   | 01:24:04   |         |         |         |
| -----       | -----      | -----      | -----   | -----   | -----   |
| TRE         | 2020-02-13 | 2020-02-13 | 41.019  | 34.827  | 0.1     |
|             | 16:06:52   | 16:13:10   |         |         |         |
| TRE         | 2020-02-13 | 2020-02-14 | 238.671 | -34.718 | 0.1     |
|             | 20:58:04   | 22:00:09   |         |         |         |
| TRE         | 2020-02-13 | 2020-02-14 | 181.050 | -84.859 | 0.1     |
|             | 21:13:01   | 22:19:18   |         |         |         |
| TRE         | 2020-02-13 | 2020-02-14 | 238.950 | -38.809 | 0.1     |
|             | 21:26:13   | 22:32:34   |         |         |         |
| TRE         | 2020-02-13 | 2020-02-14 | 182.100 | -38.809 | 0.1     |
|             | 21:38:28   | 22:44:55   |         |         |         |
| TRE         | 2020-02-13 | 2020-02-14 | 187.555 | -38.809 | 0.1     |
|             | 21:51:41   | 22:58:07   |         |         |         |
| TRE         | 2020-02-13 | 2020-02-14 | 235.866 | -26.536 | 0.1     |
|             | 22:04:03   | 23:10:23   |         |         |         |
| TRE         | 2020-02-14 | 2020-02-14 | 34.827  | 30.736  | 0.5     |
|             | 15:56:42   | 16:03:02   |         |         |         |
| TRE         | 2020-02-14 | 2020-02-14 | 36.154  | 34.827  | 0.3     |
|             | 16:09:33   | 16:15:59   |         |         |         |
| TRE         | 2020-02-14 | 2020-02-14 | 38.100  | 26.645  | 0.3     |
|             | 16:28:17   | 16:34:37   |         |         |         |
| TRE         | 2020-02-14 | 2020-02-14 | 37.222  | 22.555  | 0.2     |
|             | 16:47:40   | 16:54:06   |         |         |         |
+-------------+------------+------------+---------+---------+---------+

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 35.7% of the cumulative probability of
the LALInference skymap created on 2020-02-16 05:10:14 (UTC).

The coverage map is available at:
https://grandma-owncloud.lal.in2p3.fr/index.php/s/XgtMhPRxcyL09gR/
download?path=%2F&files=GRANDMA_S200213t_1581968146.svg

No significant transient candidates were found during our low latency
analysis [2,3]. Most of the candidates mentioned in GCN#27051,
GCN#27065, GCN#27095 were contained in our observations. ZTF20aapvtip
and ZTF20aamvoxx were observed by TAROT-Reunion but at a lower sensivity
and hours after ZTF.

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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