J/ApJS/174/313ivo://CDS.VizieR/J/ApJS/174/313doi:10.26093/cds/vizier.21740313CDSHelmboldt J.F.Kassim N.E.Cohen A.S.Lane W.M.Lazio T.J.2017-10-12T12:59:39Z2009-07-18T18:33:53ZCDS support team

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

cds-question@unistra.frradio-sourcesradio-continuum-emissionAs a service to the community, we have compiled radio frequency spectra from the literature for all sources within the VLA Low Frequency Sky Survey (VLSS) that are brighter than 15Jy at 74MHz. Over 160 references were used to maximize the amount of spectral data used in the compilation of the spectra, while also taking care to determine the corrections needed to put the flux densities from all reference on the same absolute flux density scale. With the new VLSS data, we are able to vastly improve on previous efforts to compile spectra of bright radio sources to frequencies below 100MHz because (1) the VLSS flux densities are more reliable than those from some previous low-frequency surveys and (2) the VLSS covers a much larger area of the sky ({delta}>-30{deg}) than many other low-frequency surveys (e.g., the 8C survey).2008ApJS..174..313Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/174/313CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVIII/79 : The VLA Low-frequency Sky Survey at 74MHz (Cohen+ 2007)VIII/85 : SPECFIND V2.0 Catalog of radio continuum spectra (Vollmer+ 2009)J/ApJS/150/417 : Deep, high-resolution survey at 74MHz (Cohen+, 2004)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/174/313https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/174/313http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/174/313https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/174/313https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/174/313http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/174/313GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/174/313/table4 (Parameters of the Spectral Fits)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/174/313/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/174/313/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/174/313/table4?GETtext/xml+votable180.050000true0.08555.6516940.0055555555555555566/3 18 245 911 946 1108 1129 1137 1263 1327 1419 1497 1521 1648 1701 1843 1862 2052 2063 2096 2111 2136 2225 2245 2249 2324 2402 2484 2569 2704 2899 2949 2951 2987 3022 3034 3063 3141 3186 3298 3558 3743 3861 3871 3907 3913 3917 4014 4088 4285 4303 4324 4341 4352 4366 4376 4629 4649 4706 4835 4924 5027 5070 5086 5087 5130 5284 5413 5439 5553 5617 5758 5806 5817 6075 6181 6536 6551 6605 6611 6618 6642 6797 6889 7061 7166 7268 7349 7508 7763 7873 7888 7925 8003 8017 8043 8056 8085 8152 8264 8268 8288 8528 8567 8626 8644 8675 8809 8835 8882 8989 9009 9230 9252 9273 9468 9633 9655 9769 9848 9992 10004 10052 10217 10288 10432 10485 10529 10601 10743 10849 10877 10925 11073 11171 11365 11377 11408 11512 11562 11652 11666 11667 11813 12010 12047 12057 12094 12126 12335 12359 12459 12571 12593 12684 12686 12796 13007 13120 13224 13455 13663 13707 13855 13954 14234 14285 14333 14744 14858 15045 15064 15067 15081 15091 15287 15389 15390 15494 15503 15580 15582 15672 15700 15713 15730 15909 16189 16301 16434 16496 16614 16762 16764 16787 17015 17095 17141 17158 17224 17424 17443 17445 17719 17754 17979 18017 18065 18089 18208 18365 18411 18661 18710 18713 18895 19285 19498 19543 19661 19745 19842 19857 19935 20051 20184 20390 20427 20715 20758 20813 20823 20904 21090 21133 21143 21373 21588 21653 21753 21811 22364 22452 22501 22505 22611 22659 22754 23045 23128 23185 23269 23469 23476 23688 23765 23979 24003 24014 24185 24247 24300 24349 24482 24506 24606 24710 24722 24753 24765 24902 24923 25055 25126 25188 25209 25233 25349 25444 25472 25479 25720 25810 25870 25905 25953 26033 26100 26131 26149 26202 26245 26292 26511 27026 27102 27241 27366 27382 27448 27484 27514 27521 27532 27672 27749 27765 27773 27872 27934 27955 28149 28276 28279 28376 28391 28540 28574 29320 29812 29896 30140 30259 30267 30511 30572 30779 31027 31080 31162 31221 31346 31352 31405 31509 31697 31717 31832 31940 31950 32000 32017 32322 32394 34650 34669 34715 35666 35788 36082 36160 36178 36219 36313 36431 36595 36627 39907 40141 40216 40265 40529 40547 40615 40777 40922 43948 43981 44028 44201 44403 44549 44598 44859 44938 48210 48228 48344 48493 48501 48523 48530 48572 48614 48899https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/174/313?format=asciiRadiodefaultJ/ApJS/174/313/table4Parameters of the Spectral FitsS74VLSS 74MHz flux densityJyphot.flux.density;em.radio.20-100MHzfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameThe VLSS source name (G1)meta.id;meta.maincharprimaryONameOther source name from NED (some names truncated)meta.idcharNgNumber of Gaussian components in VLSS (1)meta.numberintNnuNumber of frequencies with measured flux densitiesmeta.numberintalpha? Slope of power-law fit at {nu}>300MHzarith.grad;stat.fit.paramfloatnullableS74e? 74MHz flux density extrapolated with alphaJyphot.flux.density;em.radio.20-100MHzfloatnullableSEDPlot the spectrum with SPECFIND (Vollmer et al. 2009, Cat. VIII/85)meta.ref.urlcharA? Equation 1 "A" parameter value (2)stat.paramfloatnullableB? Equation 1 "B" parameter value (2)stat.paramfloatnullableC? Equation 1 "C" parameter value (2)stat.paramfloatnullableD? Equation 1 "D" parameter value (2)stat.paramfloatnullablerms? The rms difference between observed and fitted flux valueslog(Jy)stat.stdev;phot.flux.density;arith.difffloatnullableSimbadNameSimbad column added by the CDSmeta.idcharRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainJ/ApJS/174/313/table3FluxesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameThe VLSS source name (JHHMM+DDd) (G1)meta.id;meta.maincharFreqFrequencyMHzem.freqintSFlux density (1)Jyphot.flux.density;em.radiodoublee_SThe 1{sigma} uncertainty in SJystat.errorfloat