J/MNRAS/514/497ivo://CDS.VizieR/J/MNRAS/514/497doi:10.26093/cds/vizier/bg-g2-fhCDSLagattuta D.J.Richard J.Bauer F.E.Cerny C.Claeyssens A.Guaita L.,Jauzac M.Jeanneau A.Koekemoer A.M.Mahler G.Prieto Lyon G.,Acebron A.Meneghetti M.Niemiec A.Zitrin A.Bianconi M.Connor T.,Cen R.Edge A.Faisst A.L.Limousin M.Massey R.Sereno M.Sharon K.,Weaver J.R.2026-08-03T07:31:32Z2025-06-05T14:45:15ZCDS support team

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

cds-question@unistra.frgalaxy-clustersgalaxy-groupsinfrared-astronomyvisible-astronomyspectroscopyphotometryastrometryredshiftedWe investigate the strong-lensing cluster Abell 370 (A370) using a wide Integral Field Unit (IFU) spectroscopic mosaic from the Multi-Unit Spectroscopic Explorer (MUSE). IFU spectroscopy provides significant insight into the structure and mass content of galaxy clusters, yet IFU-based cluster studies focus almost exclusively on the central Einstein-radius region. Covering over 14 arcmin2, the new MUSE mosaic extends significantly beyond the A370 Einstein radius, providing, for the first time, a detailed look at the cluster outskirts. Combining these data with wide-field, multi-band Hubble Space Telescope (HST) imaging from the BUFFALO project, we analyse the distribution of objects within the cluster and along the line of sight. Identifying 416 cluster galaxies, we use kinematics to trace the radial mass profile of the halo, providing a mass estimate independent from the lens model. We also measure radially averaged properties of the cluster members, tracking their evolution as a function of infall. Thanks to the high spatial resolution of our data, we identify six cluster members acting as galaxy-galaxy lenses, which constrain localized mass distributions beyond the Einstein radius. Finally, taking advantage of MUSE's 3D capabilities, we detect and analyse multiple spatially extended overdensities outside of the cluster that influence lensing-derived halo mass estimates. We stress that much of this work is only possible thanks to the robust, extended IFU coverage, highlighting its importance even in less optically dense cluster regions. Overall, this work showcases the power of combining HST + MUSE, and serves as the initial step towards a larger and wider program targeting several clusters.2022MNRAS.514..497Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/514/497CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/469/3946 : Abell 370 MUSE redshifts (Lagattuta+, 2017)J/MNRAS/485/3738 : 3D structure in the A370 MUSE Mosaic (Lagattuta+, 2019)J/A+A/646/A83 : 12 massive lensing clusters MUSE observationsJ/MNRAS/492/503 : Magnifications in the Hubble Frontier Fields (Raney+, 2020)J/ApJ/868/129 : Lensing analysis in Abell 370 (Strait+, 2018)J/MNRAS/371/703 : MILES library of empirical spectra (Sanchez-Blazquez+, 2006)J/ApJS/199/25 : CLASH sources for MACS1149.6+2223 (Postman+, 2012)https://archive.stsci.edu/hlsp/buffalo : Buffalo data accesshttps://astro.dur.ac.uk/~hbpn39/pilot-wings.html : Abell 370 Pilot-WINGS datahttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/514/497https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/514/497http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/514/497https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/514/497https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/514/497http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/514/497GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/514/497/tablea1 (The Abell 370 Pilot-WINGS master data catalogue containing spectroscopic/photometric and spatial informations)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/514/497/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/514/497/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/514/497/tablea1?GETtext/xml+votable180.050000true39.965996-1.58438450.0055555555555555566/177412.0401237512456292e-19 3.9057996558789745e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/514/497?format=asciiOpticalInfrareddefaultJ/MNRAS/514/497/tablea1The Abell 370 Pilot-WINGS master data catalogue containing spectroscopic/photometric and spatial informationsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDNumerical identifier from SExtractor for each galaxy (iden) (1)meta.id;meta.mainintIDfromAn indication of how the object was detected (idfrom) (2)src.classcharFieldThe data set containing the galaxy (Field) (3)src.class.starGalaxycharRAJ2000Right Ascension aligned to Gaia DR2 world coordinate system (J2000) (RA)degpos.eq.ra;meta.mainDEJ2000Declination aligned to Gaia DR2 world coordinate system (J2000) (DEC)degpos.eq.dec;meta.mainzThe measured redshift of each galaxy (z)src.redshiftfloatq_zAn assessment of the reliability of the redshift measurement from low q_z = 1 to high q_z = 3 (zconf) (4)meta.code.qual;src.redshiftintF435Wmag? The measured apparent AB magnitude in the given HST F435W-band (F435W) (5)magphot.mag;em.opt.Bdoublenullablee_F435Wmag[]? The measured uncertainty of F435Wmag (F435W_err)magstat.errordoublenullableF606Wmag? The measured apparent AB magnitude in the given HST F606W-band (F606W) (5)magphot.mag;em.opt.Rdoublenullablee_F606Wmag[]? The measured uncertainty of F606Wmag (F606W_err)magstat.errordoublenullableF814Wmag? The measured apparent AB magnitude in the given HST F814W-band (F814W) (5)magphot.mag;em.opt.Idoublenullablee_F814Wmag[]? The measured uncertainty of F814Wmag (F814W_err)magstat.errordoublenullableF105Wmag? The measured apparent AB magnitude in the given HST F105W-band (F105W) (5)magphot.mag;em.IR.Jdoublenullablee_F105Wmag[]? The measured uncertainty of F105Wmag (F105W_err)magstat.errordoublenullableF125Wmag? The measured apparent AB magnitude in the given HST F125W-band (F125W) (5)magphot.mag;em.IR.Jdoublenullablee_F125Wmag[]? The measured uncertainty of F125Wmag (F125W_err)magstat.errordoublenullableF140Wmag? The measured apparent AB magnitude in the given HST F140W-band (F140W) (5)magphot.mag;em.IR.Jdoublenullablee_F140Wmag[]? The measured uncertainty of F140Wmag (F140W_err)magstat.errordoublenullableF160Wmag? The measured apparent AB magnitude in the given HST F60W-band (F160W) (5)magphot.mag;em.IR.Hdoublenullablee_F160Wmag[]? The measured uncertainty of F160Wmag (F160W_err)magstat.errordoublenullableMULIDIf the object is part of a multiply-imaged system it gives a unique identifier for each image (MUL) (6)meta.id.assocchar