[vsnet-grb-info 24960] LIGO/Virgo S200213t: MANGROVE catalog galaxy ranking

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  27059
SUBJECT: LIGO/Virgo S200213t: MANGROVE catalog galaxy ranking
DATE:    20/02/13 17:45:04 GMT
FROM:    Jean-Gregoire Ducoin at LAL  <ducoin at lal.in2p3.fr>

J.-G. Ducoin (IJCLab), D. Corre (IJCLab), N. Leroy (IJCLab), E. Le Floch (IRFU/CEA)

On behalf of the Mass AssociatioN for GRavitational waves ObserVations
Efficiency (MANGROVE) Team.

We spatially cross-matched the LIGO/Virgo S200213t event skymap
(90% probability volume) with the MANGROVE [1] galaxy catalog
and found 33991 compatible galaxies. We classified as "compatible"       
with the skymap, a galaxy which fulfills the two following conditions:

-Its 2D position in the sky has to be in the 90% of the 2D skymap
probability distribution.
-Its distance has to fall within the 3 sigma distance error
localization at the position of the galaxy.

We rank galaxies according to the grade Gtot presented in
Ducoin et al. [1] which uses the galaxies stellar mass in addition to
their localisation to assess their probability of hosting the event.
The stellar mass is estimated from the WISE1 luminosity. 
The list of the 20 first galaxies ranked by this grade is given below,
the full list of galaxies is available at https://mangrove.lal.in2p3.fr

+--------+------------------------+---------+---------+-----------+------------+---------+
|   Rank | Name                   |      RA |     DEC |    log(M) |   AGN_flag |    Gtot |
|        |                        |   [deg] |   [deg] |   [M_sun] |            |         |
+========+========================+=========+=========+===========+============+=========+
|      1 | 2MASS 01192705+5831151 |  19.863 |  58.521 |      11.3 |          0 | 3.7e-03 |
+--------+------------------------+---------+---------+-----------+------------+---------+
|      2 | HyperLEDA 137452       |  15.442 |  55.949 |      11.2 |          0 | 3.4e-03 |
+--------+------------------------+---------+---------+-----------+------------+---------+
|      3 | HyperLEDA 137873       |  22.541 |  57.846 |      11.2 |          0 | 2.7e-03 |
+--------+------------------------+---------+---------+-----------+------------+---------+
|      4 | HyperLEDA 2413196      |  14.865 |  52.367 |      10.9 |          0 | 2.4e-03 |
+--------+------------------------+---------+---------+-----------+------------+---------+
|      5 | GWGC PGC137746         |  20.290 |  57.658 |      11.0 |          0 | 2.3e-03 |
+--------+------------------------+---------+---------+-----------+------------+---------+
|      6 | 2MASS 01103706+5536121 |  17.654 |  55.603 |      10.8 |          0 | 2.2e-03 |
+--------+------------------------+---------+---------+-----------+------------+---------+
|      7 | HyperLEDA 2410161      |  15.600 |  52.243 |      10.8 |          0 | 2.0e-03 |
+--------+------------------------+---------+---------+-----------+------------+---------+
|      8 | 2MASS 01182764+5821363 |  19.615 |  58.360 |      11.0 |          0 | 2.0e-03 |
+--------+------------------------+---------+---------+-----------+------------+---------+
|      9 | 2MASS 01192582+5824261 |  19.858 |  58.407 |      11.0 |          0 | 1.8e-03 |
+--------+------------------------+---------+---------+-----------+------------+---------+
|     10 | GWGC PGC089894         |  21.124 |  56.182 |      11.1 |          0 | 1.8e-03 |
+--------+------------------------+---------+---------+-----------+------------+---------+
|     11 | 2MASS 01131453+5410558 |  18.311 |  54.182 |      10.7 |          0 | 1.8e-03 |
+--------+------------------------+---------+---------+-----------+------------+---------+
|     12 | GWGC NGC0020           |   2.386 |  33.309 |      11.1 |          0 | 1.6e-03 |
+--------+------------------------+---------+---------+-----------+------------+---------+
|     13 | 2MASS 01020132+5558266 |  15.506 |  55.974 |      10.7 |          0 | 1.6e-03 |
+--------+------------------------+---------+---------+-----------+------------+---------+
|     14 | HyperLEDA 2318158      |   9.727 |  48.468 |      11.3 |          0 | 1.5e-03 |
+--------+------------------------+---------+---------+-----------+------------+---------+
|     15 | 2MASS 01044353+5137119 |  16.181 |  51.620 |      10.7 |          0 | 1.5e-03 |
+--------+------------------------+---------+---------+-----------+------------+---------+
|     16 | 2MASS 01085147+5453309 |  17.214 |  54.892 |      10.6 |          0 | 1.5e-03 |
+--------+------------------------+---------+---------+-----------+------------+---------+
|     17 | HyperLEDA 2389143      |  13.787 |  51.145 |      10.7 |          0 | 1.4e-03 |
+--------+------------------------+---------+---------+-----------+------------+---------+
|     18 | HyperLEDA 3574         |  14.987 |  47.786 |      11.4 |          0 | 1.4e-03 |
+--------+------------------------+---------+---------+-----------+------------+---------+
|     19 | 2MASS 00580831+5358326 |  14.535 |  53.976 |      10.6 |          0 | 1.4e-03 |
+--------+------------------------+---------+---------+-----------+------------+---------+
|     20 | 2MASS 01155827+5806430 |  18.993 |  58.112 |      10.7 |          0 | 1.4e-03 |
+--------+------------------------+---------+---------+-----------+------------+---------+

Where the grade Gtot is defined in [1], M is the stellar mass,
AGN_flag is equal to 1 if the source is identified
as AGN from mid-infrared color criterion [1], 0 otherwise.

The estimated mass completeness of the catalog for the skymap
distance is about 56%.
This calculation was made by comparing the total mass within
the Mangrove catalog to the stellar mass function derived from
the GAMA survey [4] in the range 224 +/- 90Mpc (within 1 sigma
of the skymap [1]).

The MANGROVE catalog compiles information from the GLADE
catalog [2] and AllWISE catalog [3] up to 400Mpc and is
fully available on the MANGROVE website
(https://mangrove.lal.in2p3.fr). This website
also provides tools to download a complete list of
compatible galaxies for every gravitational wave event
below 400Mpc of the LVC O3 run with the possibility to add
observational constraints.

[1] Ducoin et al., ui.adsabs.harvard.edu/abs/2020MNRAS.492.4768D/abstract
[2] Dálya et al., ui.adsabs.harvard.edu/abs/2018MNRAS.479.2374D
[3] Cutri et al., ui.adsabs.harvard.edu/abs/2014yCat.2328....0C
[4] Wright et al., 2017, MNRAS, 470, 283