J/AZh/84/387ivo://CDS.VizieR/J/AZh/84/387CDSMingaliev M.G.Sotnikova Yu.V.Bursov N.N.Kardashev N.S.Larionov M.G.2023-07-21T07:06:27Z2008-04-13T14:47:08ZCDS support team

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

cds-question@unistra.frradio-sourcesnorth-galactic-poleWe have used the RATAN-600 radio telescope to study the spectral characteristics of a uniform sample of 504 radio sources from the NVSS catalog (Cat. VIII/65) near the North Celestial Pole at 6 frequencies from 1.1 to 21.7GHz, with the aim of selecting sources possessing inverted spectra near 22GHz, to be included in the program of the RadioAstron future space VLBI mission. We found 17 radio sources with the desired spectral characteristics. Data from spectral studies over a wide wavelength range testify that the spectral behavior of our sample differs from that for a complete sample of sources with the same initial parameters but selected at 20GHz. We find a 6% deficit of inverted-spectrum sources, which can be explained as an effect of the spectral characteristics of "sub-threshold" sources that were not included in the initial sample at 1.4GHz.2007AZh....84..387Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AZh/84/387CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AZh/84/387https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AZh/84/387http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AZh/84/387https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AZh/84/387https://vizier.iucaa.in/viz-bin/votable?-source=J/AZh/84/387http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AZh/84/387GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AZh/84/387/table5 (Obtained values of flux densities for radio sources near the North Celestial Pole)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AZh/84/387/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/AZh/84/387/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AZh/84/387/table5?GETtext/xml+votable180.050000true0.10241781.3968890.0055555555555555565/1006 2010 2014 3067 3069 4070 4072 4075 4086 6/3573-3575 3580 3827 3830 3835 3837 3839 3900 3903 3911 3915-3918 3920-3921 3930-3931 3933 3937-3938 3941-3942 3951 3954-3955 3957 3960-3961 3963 3965 3974-3975 3980 3985 3990 3997-3999 4006-4008 4010 4013-4015 4018 4022 4032-4034 4042-4044 4048 4050 4052-4054 4057 4062-4064 4067-4068 4073-4076 4078 4084-4085 4087-4088 4091 7669 7677 7929 7932-7933 7987 7991 7999 8005 8007 8012 8014-8015 8017 8020-8022 8027 8031 8036 8039 8044 8046-8049 8052-8053 8055 8061 8063 8069 8071 8074 8078 8081-8082 8085 8088-8089 8092 8097-8099 8101 8105-8106 8108-8110 8112 8116 8119-8121 8123-8124 8132 8134 8136 8138 8143-8144 8146-8148 8152 8161-8163 8165 8170-8171 8173 8175 8178-8181 8183 8185-8187 8189 11743 11766 11769 11771 11774 12023 12027 12029 12031 12083 12086 12088 12091 12094 12101-12102 12104 12108 12110 12112-12113 12115-12116 12118 12121 12123 12126-12127 12130 12134-12135 12137 12139 12141 12143 12145 12148 12151 12154 12165 12171-12173 12176-12177 12180 12182 12185 12187-12190 12193 12197 12199-12200 12205-12206 12209-12212 12214-12216 12218-12219 12221 12223 12227 12230-12232 12234 12237 12239-12241 12244 12247 12251 12254 12257-12258 12262 12264 12266-12267 12274-12275 12280 12283 15861 15865 15867-15868 16118 16121-16124 16180 16184-16185 16187 16189 16198 16201-16202 16205 16208 16212 16214-16216 16220-16221 16223-16226 16228 16231-16232 16234 16238 16241 16243 16245 16247-16248 16251-16253 16263 16265 16268-16269 16271-16272 16274 16278 16286 16293 16296 16298 16304-16305 16307 16309-16310 16312 16314-16316 16318 16323 16327 16333 16350-16352 16355-16358 16361-16362 16365-16367 16371 16374 16381-163827.28867668531662e-25 1.437857147309737e-23https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AZh/84/387?format=asciiRadiodefaultJ/AZh/84/387/table5Obtained values of flux densities for radio sources near the North Celestial PolerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintS21.7? Flux density at 21.7GHzmJyphot.flux.density;em.radio.12-30GHzfloatnullablee_S21.7? rms uncertainty on S21.7mJystat.errorfloatnullableS7.7? Flux density at 7.7GHzmJyphot.flux.density;em.radio.6-12GHzfloatnullablez? Redshiftsrc.redshiftfloatnullable_RAFrom NVSS or from name if not found in NVSS (right ascension part)degpos.eq.ra;meta.main_DEFrom NVSS or from name if not found in NVSS (declination part)degpos.eq.dec;meta.mainSPECFINDLink with radio surveys (Vollmer et al., Cat. VIII/74)meta.ref.urlcharS11.2? Flux density at 11.2GHzmJyphot.flux.density;em.radio.6-12GHzfloatnullablee_S11.2? rms uncertainty on S11.2mJystat.errorfloatnullablee_S7.7? rms uncertainty on S7.7mJystat.errorfloatnullableS4.8? Flux density at 4.8GHzmJyphot.flux.density;em.radio.3-6GHzfloatnullablee_S4.8? rms uncertainty on S4.8mJystat.errorfloatnullableS2.3? Flux density at 2.3GHzmJyphot.flux.density;em.radio.1500-3000MHzfloatnullablee_S2.3? rms uncertainty on S2.3mJystat.errorfloatnullableS1.1? Flux density at 1.1GHzmJyphot.flux.density;em.radio.750-1500MHzfloatnullablee_S1.1? rms uncertainty on S1.1mJystat.errorfloatnullableMType2Second morphological type (2)src.classcharz2? Second redshiftsrc.redshiftfloatnullableNVSSShow the nearby NVSS sourcesmeta.ref.urlcharNameSource name (HHMMSS+SSMMSS, J2000) (1)meta.id;meta.maincharn_Name[*] Note for RATAN objects with more than one possible SDSS counterpart (1)meta.notecharMType1Morphological type (2)src.classchar