J/A+A/622/A22ivo://CDS.VizieR/J/A+A/622/A22doi:10.26093/cds/vizier.36220022CDSMandal S.Intema H.T.Shimwell T.W.van Weeren R.J.Botteon A.,Roettgering H.J.A.Hoang D.N.Brunetti G.de Gasperin F.Giacintucci S.,Hoekstra H.Stroe A.Brueggen M.Cassano R.Shulevski A.Drabent A.,Rafferty D.2019-10-23T12:57:58Z2019-07-09T09:34:01ZCDS support team

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

cds-question@unistra.frgalaxy-clustersradio-sourcesA number of radio observations have revealed the presence of large synchrotron-emitting sources associated with the intra-cluster medium. There is strong observational evidence that the emitting particles have been (re-)accelerated by shocks and turbulence generated during merger events. The particles that are accelerated are thought to have higher initial energies than those in the thermal pool but the origin of such mildly relativistic particles remains uncertain and needs to be further investigated. The galaxy cluster Abell 1914 is a massive galaxy cluster in which X-ray observations show clear evidence of merging activity. We carried out radio observations of this cluster with the LOw Frequency ARay (LOFAR) at 150MHz and the Giant Metrewave Radio Telescope (GMRT) at 610MHz. We also analysed Very Large Array (VLA) 1.4GHz data, archival GMRT 325MHz data, CFHT weak lensing data and Chandra observations. Our analysis shows that the ultra-steep spectrum source (4C38.39; {alpha}<~-2), previously thought to be part of a radio halo, is a distinct source with properties that are consistent with revived fossil plasma sources. Finally, we detect some diffuse emission to the west of the source 4C38.39 that could belong to a radio halo.2019A&A...622A..22Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/622/A22CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/622/A1 : LOFAR Two-metre Sky Survey DR1 source catalog (Shimwell+, 2019)J/A+A/622/A4 : LOFAR observations XMM-LSS field (Hale+, 2019)J/A+A/622/A8 : NGC 3184, 4736, 5055 and 5194 LOFAR + WSRT maps (Heesen+, 2019)J/A+A/622/A11 : LoTSS/HETDEX. Optical quasars. I. (Guerkan+, 2019)J/A+A/622/A13 : VLA double-double radio galaxy candidates imagesJ/A+A/622/A15 : Broad absorption line quasars in LDR1 (Morabito+, 2019)J/A+A/622/A23 : LoTSS HCG and MLCG systems (Nikiel-wroczynski+, 2019)https://lofar-surveys.org : Lofar Surveys Home pagehttps://lta.lofar.eu : Lofar Long Term Archive Home pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/622/A22https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/622/A22http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/622/A22https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/622/A22https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/622/A22http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/622/A22GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/622/A22/list (List of fits images)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/622/A22/list?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/622/A22/list?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/622/A22/list?GETtext/xml+votable180.050000true216.5216737.845830.005555555555555556Associated datahttps://cdsarc.cds.unistra.fr/assocdata/?obs_collection=J/A+A/622/A226/10527https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/622/A22?format=asciiRadiodefaultJ/A+A/622/A22/listList of fits imagesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right Ascension of center (J2000)degpos.eq.ra;meta.mainDEJ2000Declination of center (J2000)degpos.eq.dec;meta.mainNxNumber of pixels along X-axismeta.numberintNyNumber of pixels along Y-axismeta.numberintObs.dateObservation datestime.epoch;obsnullableFreq? Observed frequencyHzem.freqdoublenullablesizeSize of FITS fileKibytephys.size;meta.fitsintFileNameName of FITS file, in subdirectory fitsmeta.id;meta.fitscharTitleTitle of the FITS filemeta.title;meta.fitscharAssocDataAssociated Data web pagemeta.ref.urlchar