ID                   = CDS/P/GalaxyCounts/2MPZ/0001-001
creator_did          = ivo://CDS/P/GalaxyCounts/2MPZ/0001-001
client_category      = Ancillary/GalaxyCounts/2MPZ
obs_collection       = LIGO/Virgo probability maps (0.001 < z < 0.01, 40 to 80 Mpc)
obs_title            = LIGO (0.001 < z < 0.01, 40 to 80 Mpc)
obs_description      = The initial discovery of LIGO on 14 September 2015 was the in-spiral merger and ring-down of the black hole binary at a distance of about 500 Mpc or a redshift of about 0.1. The search for electromagnetic counterparts for the in-spiral of binary black holes is impeded by poor initial source localizations and a lack of a compelling model for the counterpart; therefore, rapid electromagnetic follow-up is required to understand the astrophysical context of these sources. Because astrophysical sources of gravitational radiation are likely to reside in galaxies, it would make sense to search  rst in regions where the LIGO-Virgo probability is large and where the density of galaxies is large as well. Under the Bayesian prior assumption that the probability of a gravitational-wave event from a given region of space is proportional to the density of galaxies within the probed volume, one can calculate an improved localization of the position of the source simply by multiplying the LIGO-Virgo skymap by the density of galaxies in the range of redshifts. We propose using the 2-MASS Photometric Redshift Galaxy Catalogue for this purpose and demonstrate that using it can dramatically reduce the search region for electromagnetic counterparts.
obs_ack              = The software and galaxy maps used in this paper is available at http://ubc-astrophysics.github.io . We used the VizieR Service, the NASA ADS service, the Super-COSMOS Science Archive, the NASA/IPAC Infrared Science Archive, the HEALPy libraries and arXiv.org.
hips_creator         = Buga M. (CDS)
hips_copyright       = CNRS/Unistra
prov_progenitor      = UBC-Astrophysics
bib_reference_url    = https://ui.adsabs.harvard.edu/abs/2016MNRAS.462.1085A/abstract
obs_copyright        = UBC-Astrophysics
obs_copyright_url    = http://copyright.ubc.ca/guidelines-and-resources/faq/
t_min                = 50600
t_max                = 51941
obs_regime           = Infrared
hips_builder         = Aladin/HipsGen v10.125
hips_version         = 1.4
hips_release_date    = 2019-05-21T06:36Z
hips_frame           = equatorial
hips_order           = 3
hips_tile_width      = 32
hips_master_url      = http://alasky.unistra.fr/pub/arxiv.1602.07710v1/HIPS_0001_001/
hips_status          = public master clonableOnce
hips_tile_format     = png fits
hips_pixel_bitpix    = -32
hips_pixel_cut       = -3.735E-7 0.1841
hips_data_range      = -0.1577 0.4732
hips_pixel_scale     = 0.229
dataproduct_type     = image
moc_sky_fraction     = 1
hips_estsize         = 6566
hipsgen_date         = 2016-10-21T14:47Z
hipsgen_params       = in=2MPZ.gz_0.001_0.01_smoothed.fits out=HIPS_0001_001 ivorn=ivo://CDS/P/LIGO/0001 "Publisher=M.Buga [CDS]"
hips_creation_date   = 2016-10-21T14:47Z
hipsgen_date_1       = 2016-10-21T14:47Z
hipsgen_params_1     = in=2MPZ.gz_0.001_0.01_smoothed.fits out=HIPS_0001_001 ivorn=ivo://CDS/P/LIGO/0001 "Publisher=M.Buga [CDS]"
hips_initial_fov     = 58.63230142835039
hips_initial_ra      = 0
hips_initial_dec     = +0
bib_reference        = 2016MNRAS.462.1085A
hips_order_min       = 0
hipsgen_date_2       = 2019-05-21T06:36Z
hipsgen_params_2     = out=/asd-volumes/sc1-asd-volume6/pub/arxiv.1602.07710v1/HIPS_0001_001 UPDATE
hips_service_url     = https://alasky.cds.unistra.fr/pub/arxiv.1602.07710v1/HIPS_0001_001
hips_service_url_1   = https://alaskybis.cds.unistra.fr/pub/arxiv.1602.07710v1/HIPS_0001_001
hips_status_1        = public mirror clonableOnce
moc_type             = stmoc
moc_time_order       = 25
moc_time_range       = 1
moc_order            = 8
obs_initial_ra       = 0
obs_initial_dec      = +0
obs_initial_fov      = 0.2290324274544937
TIMESTAMP            = 1696351628598