J/AJ/163/264ivo://CDS.VizieR/J/AJ/163/264doi:10.26093/cds/vizier.51630264CDSHuber M.C.Bregman J.N.2022-11-25T13:13:50Z2022-10-12T09:47:16ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frintergalactic-mediumactive-galactic-nucleigalaxiesvisible-astronomybroad-band-photometryspectroscopyultraviolet-astronomyMost baryonic matter in the universe exists in gaseous form and can be found in structures such as galactic halos and the low-density intergalactic medium. Proposed X-ray spectroscopy missions such as Athena, Arcus, and Lynx will have the capability to identify absorption lines in spectra toward bright active galactic nuclei (AGNs), which can be used as tools to probe this missing matter. In this study, we examine the optical fields surrounding 15 primary observing targets and identify the foreground galaxies and galaxy groups that are potential hosts of absorption. We record the basic properties of the potential host and their angular and physical separation from the AGN line of sight. This process is done by marking the location of various galaxies and groups in optical images of the field surrounding the target and plotting their angular separation versus redshift to gauge the physical proximity to the background source. We identify the surrounding objects according to those with measured redshifts and those that require accurate redshift measurements.2022AJ....163..264Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/163/264CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/350 : VLT Survey Telescope ATLAS (Shanks+, 2015)II/371 : The Dark Energy Survey (DES) Data Release 2 (Abott+, 2021)VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)J/ApJS/193/28 : Galaxy survey around 20 UV-bright quasars (Prochaska+, 2011)J/ApJ/884/L31 : Spectra & HST obs. gal. in 1ES1553+113 field (Johnson+, 2019)J/ApJS/243/24 : The CASBaH galaxy redshift survey (Prochaska+, 2019)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/163/264https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/163/264http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/163/264https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/163/264https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/163/264http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/163/264GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/163/264/table3 (Objects within 10arcmin of AGN)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/163/264/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/163/264/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/163/264/table3?GETtext/xml+votable180.050000true157.838791750.88828890.0055555555555555566/6020-6021 7969 8210-8211 8216-8217 10800 10802 11341 11352 11449 11451-11452 11680 11682-11683 16447 16787 16790 16793 16796 17775 17786 20097 20099 25132 26129-26131 28352-28353 28517 28528https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/163/264?format=asciiUVOpticaldefaultJ/AJ/163/264/table3Objects within 10arcmin of AGNrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintAGNAGN Fieldobs.fieldcharf_AGNFlag on AGN Field (1)meta.codecharObjectObject name in AGN Fieldmeta.id;meta.maincharRAJ2000[0/23] Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainz[0.002/1.8]? Redshiftsrc.redshiftdoublenullablef_zType of Redshift; spectroscopic or photometricmeta.codecharomag[0.53/23.1]? Apparent magnitudemagphot.magfloatnullableSep[0.14/22] Separation of Object from AGNarcminpos.angDistancedoubleImpact[24.8/55000]? Impact parameterkpcsrc.impactParamdoublenullableNEDNED column added by the CDSmeta.ref.urlchar