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GCN Circular 26558

Subject
LIGO/Virgo S191213g : No significant candidates found in GRANDMA citizen science observations
Date
2019-12-22T16:58:41Z (4 years ago)
From
Jean-Gregoire Ducoin at LAL <ducoin@lal.in2p3.fr>
J.-G. Ducoin (LAL), D. Turpin (AIM-CEA), S. Antier (APC), B. Chabert 
(IRAP), D. Corre (LAL), A. Klotz (IRAP), M. Boer (Artemis),
N. Christensen (Artemis), M. Coughlin (Caltech), D. Coward (OzGrav-UWA), 
B. Gendre (OzGrav-UWA), P. Hello (LAL), D. A. Kann (HETH/IAA-CSIC), N.
Kochiashvili (Iliauni), C. Lachaud (APC), N. Leroy (LAL), C. Thoene
(HETH/IAA-CSIC), D. Turpin (AIM-CEA), X. Wang (THU)

report on behalf of the GRANDMA collaboration.

We performed galaxy-targeted observations of the LIGO/Virgo event
S191213g event (GCN #26402) with the amator astronomers
of GRANDMA citizen science program "kilonova-catcher" created
by CNRS/IRAP and CNRS/LAL [1].

Denis St-Gelais and Marc Serrau performed galaxy-targeted
observations in clear filter of the S191213g event.
Denis St-Gelais imaged 12 fields with a 36-cm telescope located
in Quer��taro (Mexico). Marc Serrau imaged 1 field with a 28-cm telescope
located near Haute Provence Observatory (France). The typical magnitude
is 19 for both sites with an exposure time of 26 min and 76 min
respectively.

The target galaxies are selected from the list of potential host
galaxies from the Mangrove catalog [2] in the 90% credible area of the
localization region of the LIGO/Virgo GW event (LALInference skymap 
created on 2019-12-14 00:59:57 UTC).


No significant transient candidates were found during our analysis [3].

The coverage map is available at:
https://grandma-owncloud.lal.in2p3.fr/index.php/s/P3cuh5eZt46lNIs/download


The list of the galaxies we observed is given in the table below.
TStart and TEnd refers respectively to the time of the first and last
exposure for a given galaxy. Observations are not necessarily continuous
in this interval.

+----------+----------+-----------------------+--------+--------+------+
|TStart    | TEnd     | Galaxy                | RA     | DEC    | Dist.|
|[UTC]     | [UTC]    | name                  | [deg]  | [deg]  | [Mpc]|
|----------+----------+-----------------------+--------+--------+------|
|2019-12-14|2019-09-03|UGC 02249              |41.849  |45.531  |114.81|
| 20:20:35 | 09:41:35 |                       |        |        |      |
|2019-12-15|2019-09-02|UGC 02249              |41.849  |45.531  |114.81|
| 01:24:10 | 02:40:10 |                       |        |        |      |
|2019-12-15|2019-09-03|2MASS 03011222+4454285 |45.301  |44.908  |191.45|
| 01:54:13 | 02:10:13 |                       |        |        |      |
|2019-12-15|2019-09-03|PGC 090026             |86.831  |-6.836  |95.14 |
| 04:36:59 | 04:52:59 |                       |        |        |      |
|2019-12-15|2019-09-03|NGC 2076               |86.698  |-16.782 |33.70 |
| 05:05:49 | 05:21:49 |                       |        |        |      |
|2019-12-15|2019-09-03|NGC 2196               |93.040  |-21.806 |36.82 |
| 05:33:12 | 05:49:12 |                       |        |        |      |
|2019-12-15|2019-09-03|NGC 2206               |93.999  |-26.765 |85.85 |
| 06:00:22 | 06:16:22 |                       |        |        |      |
|2019-12-15|2019-09-03|2MASX 06483359+0145387 |102.140 |1.761   |126.80|
| 06:57:12 | 07:11:12 |                       |        |        |      |
|2019-12-15|2019-09-03|2MASX 06443904+0112542 |101.163 |1.215   |42.13 |
| 07:21:59 | 07:37:59 |                       |        |        |      |
|2019-12-15|2019-09-03|2MASX 06464860+0041324 |101.703 |0.692   |176.15|
| 07:49:39 | 08:05:39 |                       |        |        |      |
|2019-12-15|2019-09-03|2MASX 06404238-0059116 |100.177 |-0.987  |152.74|
| 08:28:46 | 08:44:46 |                       |        |        |      |
|2019-12-15|2019-09-03|2MASX 06501768-0251397 |102.574 |-2.861  |32.24 |
| 08:59:00 | 09:15:00 |                       |        |        |      |
|2019-12-15|2019-09-03|PGC 983153             |87.658  |-10.042 |94.94 |
| 09:26:45 | 09:42:45 |                       |        |        |      |
+----------+----------+-----------------------+--------+--------+------+


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 (https://grandma.lal.in2p3.fr/). Details on the
GRANDMA web pages and the citizen science program "kilonova-catcher"  
are available on https://grandma-kilonovacatcher.lal.in2p3.fr/

[1] https://grandma-kilonovacatcher.lal.in2p3.fr
[2] J.-G. Ducoin et al., arXiv:1911.05432
[3] S. Antier et al., MNRAS 2019, https://doi.org/10.1093/mnras/stz3142
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