J/MNRAS/392/1403ivo://CDS.VizieR/J/MNRAS/392/1403doi:10.26093/cds/vizier.73921403CDSSirothia S.K.Saikia D.J.Ishwara-Chandra C.H.Kantharia N.G.2024-07-08T20:15:02Z2009-10-17T16:32:04ZCDS support team

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

cds-question@unistra.frradio-sourcesradio-galaxiesWe present deep multifrequency observations using the Giant Metrewave Radio Telescope (GMRT) at 153, 244, 610 and 1260MHz of a field centred on J0916+6348, to search for evidence of fossil radio lobes which could be due to an earlier cycle of episodic activity of the parent galaxy, as well as haloes and relics in clusters of galaxies. We do not find any unambiguous evidence of episodic activity in a list of 374 sources, suggesting that such activity is rare even in relatively deep low-frequency observations. We examine the spectra of all the sources by combining our observations with those from the Westerbork Northern Sky Survey (WENSS), NRAO (National Radio Astronomy Observatories) VLA (Very Large Array) Sky Survey (NVSS) and the Faint Images of the Radio Sky at Twenty-Centimeters Survey (FIRST).2009MNRAS.392.1403Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/392/1403CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/392/1403https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/392/1403http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/392/1403https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/392/1403https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/392/1403http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/392/1403GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/392/1403/table2 (The steep-spectrum sources with a spectral index steeper than 1.3)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/392/1403/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/392/1403/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/392/1403/table2?GETtext/xml+votable180.050000true135.8037564.0003060.0055555555555555565/1853 1896 6/7389-7391 7420-7421 7562-7563 7592https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/392/1403?format=asciiRadiodefaultJ/MNRAS/392/1403/table2The steep-spectrum sources with a spectral index steeper than 1.3recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGMRTSource name (HHMMSS+DDMMSS) (1)meta.id;meta.maincharDistDistance of the centroid of the source in the 150MHz image from the pointing centredegpos.angDistancefloatS153Total flux density at 153MHzmJyphot.flux.density;em.radio.100-200MHzfloatS244Total flux density at 224MHzmJyphot.flux.density;em.radio.200-400MHzfloatS330? Total flux density at 330MHzmJyphot.flux.density;em.radio.200-400MHzfloatnullableS610? Total flux density at 610MHzmJyphot.flux.density;em.radio.400-750MHzfloatnullableS1260? Total flux density at 1260MHzmJyphot.flux.density;em.radio.750-1500MHzfloatnullableS1400? Total flux density at 1400MHzmJyphot.flux.density;em.radio.750-1500MHzfloatnullableSI? Spectral index from a linear least-squares fit for which the spectrum could be satisfactorily fitted with a straight spectrumspect.indexfloatnullableClStructural classification (2)meta.code;src.morphcharSEDShow the SED with other frequencies from SPECFIND (Cat. VIII/85)meta.ref.urlcharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.main