J/ApJS/245/17ivo://CDS.VizieR/J/ApJS/245/17doi:10.26093/cds/vizier.22450017CDSYang X.Joshi R.Gopal-KrishnaAn T.Ho L.C.Wiita P.J.Liu X.,Yang J.Wang R.Wu X.-B.Yang X.2021-08-18T09:35:34Z2020-05-14T07:14:00ZCDS support team

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

cds-question@unistra.frradio-galaxiesradio-continuum-emissionabsolute-magnitudequasarsredshiftedvisible-astronomysloan-photometrygalaxy-classification-systemsactive-galactic-nucleiWe present a catalog of 290 "winged" or X-shaped radio galaxies (XRGs) extracted from the latest (2014 December 17) data release of the "Very Large Array Faint Images of the Radio Sky at Twenty centimeter". We have combined these radio images with their counterparts in the TIFR GMRT sky survey at 150MHz, in an attempt to identify any low surface brightness radio emission present in these sources. This has enabled us to assemble a sample of 106 "strong" XRG candidates and 184 "probable" XRG candidates whose XRG designation needs to be verified by further observations. The present sample of 290 XRG candidates is almost twice as large as the number of XRGs currently known. Twenty-five of our 290 XRG candidates (9 "strong" and 16 "probable") are identified as quasars. Double-peaked narrow emission lines are seen in the optical spectra of three of the XRG candidates (two "strong" and one "probable"). Nearly 90% of the sample is located in the FR II domain of the Owen-Ledlow diagram. A few of the strong XRG candidates have a rather flat radio spectrum (spectral index {alpha} flatter than -0.3) between 150MHz and 1.4GHz, or between 1.4 and 5GHz. Since this is not expected for lobe-dominated extragalactic radio sources (like nearly all known XRGs), these sources are particularly suited for follow-up radio imaging and near-simultaneous measurement of the radio spectrum.2019ApJS..245...17Yhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/245/17CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVIII/52 : The MIT-Green Bank 5GHz Survey (Bennett+, 1986-91)VIII/13 : A new catalog of 53522 4.85GHz sources (Becker+ 1991)VIII/38 : The Parkes-MIT-NRAO 4.85GHz (PMN) Surveys (Wright+, 1996)VIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998)VIII/51 : the FIRST Survey, version 1998Feb (White+ 1998)VIII/59 : the FIRST Survey, version 1999Jul (White+ 1999)VIII/71 : The FIRST Survey Catalog, Version 03Apr11 (Becker+ 2003)VIII/90 : The FIRST Survey Catalog, Version 12Feb16 (Becker+ 2012)VIII/92 : The FIRST Survey Catalog, Version 2014Dec17 (Helfand+, 2015)J/ApJS/80/137 : Southern Extragalactic Radio Sources (Jones+, 1992)J/AJ/133/2097 : FIRST "Winged" & X-shaped radio source cand. (Cheung, 2007)J/ApJS/181/548 : X-shaped radio sources. II. New redshifts (Cheung+, 2009)J/ApJS/194/31 : Morphology for groups in the FIRST database (Proctor, 2011)J/ApJS/199/27 : The ATLBS Extended Source Sample (Saripalli+, 2012)J/ApJS/220/7 : Abundance of X-shaped radio sources. I. VLA (Roberts+, 2015)J/A+A/598/A78 : The GMRT 150MHz all-sky radio survey (Intema+, 2017)J/ApJ/852/47 : "X-shaped" radio sources. I. VLA imaging (Roberts+, 2018)J/ApJ/852/48 : "X-shaped" radio sources. II. (Saripalli+, 2018)http://www.sdss.org/ : SDSS home pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/245/17https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/245/17http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/245/17https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/245/17https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/245/17http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/245/17GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/245/17/table2 ("Strong" X-shaped radio source candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/245/17/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/245/17/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/245/17/table2?GETtext/xml+votable180.050000true1.209458312.81097220.005555555555555556Cone search capability for table J/ApJS/245/17/table3 ("Probable" X-shaped radio source candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/245/17/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/245/17/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/245/17/table3?GETtext/xml+votable180.050000true2.32883334.96477780.0055555555555555566/30 4114 4148 4156 4158 4172 4193 4244 4315 4337 4351 4383 4399 4407 4480 4578 4635 4661 4679 4715 4842 4851 4869 4909 4958 5031 5087 5201 5333 5334 5337 5338 5376 5386 5388 5417 5439 5441 5461 5471 5498 5578 5618 5653 5736 5760 5773 5801 5818 5821 5830 5851 5898 5903 5907 5971 6009 6050 6074 6098 6222 6229 6236 6268 6352 6375 6378 6398 6451 6482 6514 6518 6559 6587 6590 6644 6648 6737 6743 6941 6960 6986 6998 7122 7207 7215 7230 7290 7328 7356 7361 7370 7372 7396 7439 7481 7500 8220 8247 8304 8325 8416 8457 8488 8566 8623 8632 8646 8649 8870 8897 8945 8954 9095 9098 9146 9151 9154 9252 9282 9359 9383 9385 9400 9544 9728 9781 9923 9953 10049 10302 10316 10329 10463 10482 10610 10631 10664 10670 10738 10772 10836 10865 11010 11041 11065 11075 11193 11244 11483 11915 12300 12363 12551 17389 17580 17605 17749 17785 17856 17860 17868 17872 17904 17944 17961 17963 18013 18072 18167 18188 18232 18292 18633 18649 18652 18692 18811 18842 18887 18993 19213 19224 19282 19481 19572 19655 21970 21979 22002 22006 22391 23177 23208 25571 25576 25585 25723 25726 25938 26183 26213 26221 26260 26289 26380 26458 26482 26498 26503 26536 26541 26612 26619 26623 26797 26813 26842 26909 26945 26966 26995 27014 27041 27042 27113 27153 27194 27225 27238 27310 27365 27418 27419 27520 27551 27622 27815 27886 27920 27926 27958 27992 28010 28013 28028 28038 28170 28202 28234 28237 28247 28373 28408 28423 28425 28463 28583 28599 28614 28660 30059 30060 30066 31307 31345 31361 31400 31428 31484 31546 31727 32443 32485 36727 36768 36844 40823 40900 40909 40924 40947 44927 44995 44997 45007 49021 491379.939104750406538e-26 3.5010283109654867e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/245/17?format=asciiOpticalRadiodefaultJ/ApJS/245/17/table2"Strong" X-shaped radio source candidatesSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSNameShort name (JHHMM+DDMM)meta.id;meta.maincharf_SNamea: Also appeared in Proctor (2011, J/ApJS/194/31)meta.codecharRAJ2000Hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of declination (J2000)pos.eq.dec;meta.mainz[0.01/1.4]? Redshift from NED and/or SDSSsrc.redshiftfloatnullablen_zNote on z (1)meta.notecharrmag[12/24]? SDSS r-band apparent (AB) magnitude of the host galaxymagphot.mag;em.opt.RfloatnullableRMag[-26/0]? Absolute R-band magnitude of the host galaxymagphys.magAbs;em.opt.RfloatnullableS0.15[0.09/9.2]? Integrated 150MHz flux density from TGSS_ADR1 (Intema+ 2017, J/A+A/598/A78) (2)Jyphot.flux.density;em.radio.100-200MHzfloatnullableS1.4[0.02/1.2]? Integrated 1.4GHz flux density from NVSS (Condon+ 1998, VIII/65) (3)Jyphot.flux.density;em.radio.750-1500MHzfloatnullableS5[0.02/0.7]? Integrated 5GHz/4.85GHz flux densityJyphot.flux.density;em.radio.3-6GHzfloatnullabler_S5References for 5GHz/4.85 GHz flux density (4)meta.ref;pos.framecharalph1[-1.2/-0.18]? Spectral index between 150MHz and 1.4GHz (only for Table 2)spect.indexfloatnullablealph2[-1.25/1.07]? Spectral index between 1.4GHz and 5GHz/4.85GHz (only for Table 2)spect.indexfloatnullableRCatDisplay data from NVSS (VIII/65), Intema+, 2017 (J/A+A/598/A78), PMN (VIII/38), Becker+ 1991, VIII/13 and Bennett+, 1986-91 (VIII/52) within 30"meta.ref.urlintnullableFIRSTDisplay data from FIRST (VIII/92) within 1'meta.ref.urlcharP11Display data from Proctor+, 2011, J/ApJS/194/31 within 15"meta.ref.urlcharSloanDisplay the online SDSS data for the nearest objectmeta.ref.urlcharJ/ApJS/245/17/table3"Probable" X-shaped radio source candidatesSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSNameShort name (JHHMM+DDMM)meta.id;meta.maincharf_SNamea: Also appeared in Proctor (2011, J/ApJS/194/31)meta.codecharRAJ2000Hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of declination (J2000)pos.eq.dec;meta.mainz[0.01/1.4]? Redshift from NED and/or SDSSsrc.redshiftfloatnullablen_zNote on z (1)meta.notecharrmag[12/24]? SDSS r-band apparent (AB) magnitude of the host galaxymagphot.mag;em.opt.RfloatnullableRMag[-26/0]? Absolute R-band magnitude of the host galaxymagphys.magAbs;em.opt.RfloatnullableS0.15[0.09/9.2]? Integrated 150MHz flux density from TGSS_ADR1 (Intema+ 2017, J/A+A/598/A78) (2)Jyphot.flux.density;em.radio.100-200MHzfloatnullableS1.4[0.02/1.2]? Integrated 1.4GHz flux density from NVSS (Condon+ 1998, VIII/65) (3)Jyphot.flux.density;em.radio.750-1500MHzfloatnullableS5[0.02/0.7]? Integrated 5GHz/4.85GHz flux densityJyphot.flux.density;em.radio.3-6GHzfloatnullabler_S5References for 5GHz/4.85 GHz flux density (4)meta.ref;pos.framecharRCatDisplay data from NVSS (VIII/65), Intema+, 2017 (J/A+A/598/A78), PMN (VIII/38), Becker+ 1991, VIII/13 and Bennett+, 1986-91 (VIII/52) within 30"meta.ref.urlintnullableFIRSTDisplay data from FIRST (VIII/92) within 1'meta.ref.urlcharP11Display data from Proctor+, 2011, J/ApJS/194/31 within 15"meta.ref.urlcharSloanDisplay the online SDSS data for the nearest objectmeta.ref.urlchar