GCN Circular 26362
Subject
LIGO/Virgo S191129u : No significant candidates in FRAM-TAROT-GRANDMA observations.
Date
2019-12-06T10:26:54Z (4 years ago)
From
Cyril Lachaud at APC/Univ. Paris Diderot <cyril.lachaud@in2p3.fr>
S. Beradze (Iliauni), T. Sadibekova (AIM-CEA), 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 (AIM-CEA, NAOC),
X. Wang (THU)
report on behalf of the FRAM-Auger, TAROT-Calern (TCA), TAROT-Chili
(TCH) and GRANDMA collaborations.
We performed tiled observations of the LIGO/Virgo S191129u event with the
FRAM-Auger, 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),
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 in R (AB mag) for a
given exposure in seconds.
+-------------+---------+----------+-----------+------------+
| Telescope | Delay | Filter | f.o.v. | Limiting |
| | [min] | | [deg] | Mag. |
|-------------+---------+----------+-----------+------------|
| FRAM-Auger | 677 | R | 1.0 x 1.0 | 17.0 (60s) |
| TCA | 633 | Clear | 1.9 x 1.9 | 18.0 (60s) |
| TCH | 640 | Clear | 1.9 x 1.9 | 18.0 (60s) |
+-------------+---------+----------+-----------+------------+
We performed the following joint tiled observations [1]:
+-------------+------------+------------+---------+---------+---------+
| Telescope | TStart | TEnd | RA | DEC | Proba |
| | [UTC] | [UTC] | [deg] | [deg] | [%] |
|-------------+------------+------------+---------+---------+---------|
| FRAM-Auger | 2019-11-30 | 2019-11-30 | 337.391 | -55.946 | 0.3 |
| | 00:57:25 | 01:01:52 | | | |
| FRAM-Auger | 2019-11-30 | 2019-11-30 | 338.614 | -56.919 | 0.3 |
| | 01:20:02 | 01:22:02 | | | |
| FRAM-Auger | 2019-11-30 | 2019-11-30 | 334.170 | -53.027 | 0.3 |
| | 01:22:39 | 01:27:06 | | | |
| FRAM-Auger | 2019-11-30 | 2019-11-30 | 335.785 | -53.027 | 0.3 |
| | 01:27:42 | 01:32:09 | | | |
| FRAM-Auger | 2019-11-30 | 2019-11-30 | 336.832 | -56.919 | 0.3 |
| | 01:32:45 | 01:37:12 | | | |
| FRAM-Auger | 2019-11-30 | 2019-11-30 | 338.071 | -57.892 | 0.3 |
| | 01:37:47 | 01:42:14 | | | |
| FRAM-Auger | 2019-11-30 | 2019-11-30 | 339.899 | -57.892 | 0.3 |
| | 01:42:50 | 01:47:17 | | | |
| FRAM-Auger | 2019-11-30 | 2019-11-30 | 336.881 | -54.000 | 0.3 |
| | 01:48:50 | 01:53:17 | | | |
| FRAM-Auger | 2019-11-30 | 2019-11-30 | 342.099 | -60.811 | 0.3 |
| | 01:54:00 | 01:58:27 | | | |
| FRAM-Auger | 2019-11-30 | 2019-11-30 | 340.645 | -59.838 | 0.3 |
| | 01:59:56 | 02:04:23 | | | |
| FRAM-Auger | 2019-11-30 | 2019-11-30 | 339.267 | -58.865 | 0.2 |
| | 02:05:14 | 02:09:41 | | | |
| FRAM-Auger | 2019-11-30 | 2019-11-30 | 335.652 | -55.946 | 0.2 |
| | 02:10:36 | 02:15:03 | | | |
| FRAM-Auger | 2019-11-30 | 2019-11-30 | 335.279 | -51.081 | 0.2 |
| | 02:30:51 | 02:35:18 | | | |
| FRAM-Auger | 2019-11-30 | 2019-11-30 | 338.028 | -54.973 | 0.2 |
| | 02:35:54 | 02:40:21 | | | |
| FRAM-Auger | 2019-11-30 | 2019-11-30 | 341.152 | -58.865 | 0.2 |
| | 02:40:58 | 02:45:25 | | | |
| FRAM-Auger | 2019-11-30 | 2019-11-30 | 344.634 | -63.730 | 0.2 |
| | 02:46:01 | 02:50:28 | | | |
| FRAM-Auger | 2019-11-30 | 2019-11-30 | 340.111 | -60.811 | 0.2 |
| | 02:51:02 | 03:08:26 | | | |
| ----- | ----- | ----- | ----- | ----- | ----- |
| TCA | 2019-11-30 | 2019-11-30 | 191.012 | 35.280 | 0.6 |
| | 00:13:27 | 00:19:46 | | | |
| TCA | 2019-11-30 | 2019-11-30 | 185.236 | 31.569 | 0.5 |
| | 00:26:27 | 05:33:02 | | | |
| TCA | 2019-11-30 | 2019-11-30 | 193.561 | 37.136 | 0.5 |
| | 00:33:14 | 03:09:47 | | | |
| TCA | 2019-11-30 | 2019-11-30 | 187.535 | 33.424 | 0.5 |
| | 00:39:58 | 05:45:47 | | | |
| TCA | 2019-11-30 | 2019-11-30 | 187.379 | 31.569 | 0.7 |
| | 00:54:20 | 02:00:21 | | | |
| TCA | 2019-11-30 | 2019-11-30 | 201.487 | 40.847 | 0.4 |
| | 01:05:54 | 03:41:42 | | | |
| TCA | 2019-11-30 | 2019-11-30 | 189.521 | 31.569 | 0.4 |
| | 01:18:41 | 01:25:00 | | | |
| TCA | 2019-11-30 | 2019-11-30 | 198.147 | 37.136 | 0.4 |
| | 01:25:20 | 04:01:08 | | | |
| TCA | 2019-11-30 | 2019-11-30 | 204.536 | 42.703 | 0.3 |
| | 01:44:51 | 04:20:52 | | | |
| TCA | 2019-11-30 | 2019-11-30 | 185.738 | 29.713 | 0.7 |
| | 02:11:10 | 04:47:26 | | | |
| TCA | 2019-11-30 | 2019-11-30 | 189.731 | 33.424 | 0.7 |
| | 02:17:53 | 04:54:12 | | | |
| TCA | 2019-11-30 | 2019-11-30 | 193.248 | 35.280 | 0.6 |
| | 02:30:33 | 05:06:52 | | | |
| TCA | 2019-11-30 | 2019-11-30 | 195.855 | 37.136 | 0.6 |
| | 02:37:18 | 05:13:37 | | | |
| TCA | 2019-11-30 | 2019-11-30 | 198.597 | 38.991 | 0.5 |
| | 02:49:57 | 05:26:17 | | | |
| TCA | 2019-11-30 | 2019-11-30 | 200.950 | 38.991 | 0.4 |
| | 03:15:58 | 03:22:17 | | | |
| TCA | 2019-11-30 | 2019-11-30 | 191.926 | 33.424 | 0.4 |
| | 03:22:43 | 03:29:02 | | | |
| TCA | 2019-11-30 | 2019-11-30 | 196.244 | 38.991 | 0.4 |
| | 03:42:21 | 03:48:40 | | | |
| TCA | 2019-11-30 | 2019-11-30 | 207.019 | 42.703 | 0.4 |
| | 04:01:33 | 04:07:52 | | | |
| ----- | ----- | ----- | ----- | ----- | ----- |
| TCH | 2019-11-30 | 2019-12-01 | 334.643 | -52.686 | 1.0 |
| | 00:20:23 | 04:09:13 | | | |
| TCH | 2019-11-30 | 2019-11-30 | 335.463 | -54.505 | 1.0 |
| | 00:27:00 | 00:33:18 | | | |
| TCH | 2019-11-30 | 2019-12-01 | 326.623 | -39.959 | 1.0 |
| | 00:39:24 | 04:16:01 | | | |
| TCH | 2019-11-30 | 2019-12-01 | 339.298 | -58.141 | 0.9 |
| | 00:46:12 | 06:52:11 | | | |
| TCH | 2019-11-30 | 2019-11-30 | 326.111 | -38.141 | 0.9 |
| | 00:52:57 | 01:11:40 | | | |
| TCH | 2019-11-30 | 2019-12-02 | 341.443 | -59.959 | 0.9 |
| | 01:18:24 | 00:35:44 | | | |
| TCH | 2019-11-30 | 2019-12-02 | 344.009 | -63.595 | 0.7 |
| | 01:31:19 | 01:07:37 | | | |
| TCH | 2019-11-30 | 2019-12-02 | 337.732 | -60.434 | 0.4 |
| | 01:38:05 | 01:14:23 | | | |
| TCH | 2019-11-30 | 2019-12-02 | 342.950 | -65.414 | 0.4 |
| | 01:44:51 | 01:21:08 | | | |
| TCH | 2019-11-30 | 2019-12-01 | 332.350 | -49.050 | 1.1 |
| | 02:11:04 | 03:30:54 | | | |
| TCH | 2019-11-30 | 2019-12-01 | 329.646 | -45.414 | 1.1 |
| | 02:17:50 | 03:24:11 | | | |
| TCH | 2019-11-30 | 2019-12-01 | 330.701 | -47.232 | 1.1 |
| | 02:24:34 | 01:00:55 | | | |
| TCH | 2019-11-30 | 2019-12-01 | 333.659 | -50.868 | 1.0 |
| | 02:37:02 | 03:43:18 | | | |
| TCH | 2019-11-30 | 2019-12-01 | 327.945 | -41.777 | 1.0 |
| | 02:43:45 | 01:20:06 | | | |
| TCH | 2019-11-30 | 2019-12-01 | 337.617 | -56.323 | 1.0 |
| | 03:02:59 | 01:39:22 | | | |
| TCH | 2019-11-30 | 2019-12-01 | 328.434 | -38.141 | 0.4 |
| | 04:08:05 | 02:44:21 | | | |
| TCH | 2019-11-30 | 2019-11-30 | 327.352 | -36.323 | 0.4 |
| | 04:14:50 | 04:21:09 | | | |
| TCH | 2019-12-01 | 2019-12-01 | 328.627 | -43.595 | 1.0 |
| | 03:43:46 | 03:50:04 | | | |
+-------------+------------+------------+---------+---------+---------+
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 24% of the cumulative probability of
the BAYESTAR skymap available on 2019-11-29 13:42:00 (UTC).
The coverage map is available at:
https://grandma-owncloud.lal.in2p3.fr/index.php/s/YMk334EKRjSfnGD
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