J/MNRAS/458/1057ivo://CDS.VizieR/J/MNRAS/458/1057doi:10.26093/cds/vizier.74581057CDSOffringa A.R.Trott C.M.Hurley-Walker N.Johnston-Hollitt M.,McKinley B.Barry N.Beardsley A.P.Bowman J.D.Briggs F.Carroll P.,Dillon J.S.Ewall-Wice A.Feng L.Gaensler B.M.Greenhill L.J.,Hazelton B.J.Hewitt J.N.Jacobs D.C.Kim H.-S.Kittiwisit P.Lenc E.,Line J.Loeb A.Mitchell D.A.Morales M.F.Neben A.R.Paul S.,Pindor B.Pober J.C.Procopio P.Riding J.Sethi S.K.Shankar N.U.,Subrahmanyan R.Sullivan I.S.Tegmark M.Thyagarajan N.Tingay S.J.,Wayth R.B.Webster R.L.Wyithe J.S.B.2024-08-15T20:18:18Z2017-07-03T10:19:40ZCDS support team

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

cds-question@unistra.frradio-sourcesinterferometryradio-astronomyExperiments that pursue detection of signals from the Epoch of Reionization (EoR) are relying on spectral smoothness of source spectra at low frequencies. This article empirically explores the effect of foreground spectra on EoR experiments by measuring high-resolution full-polarization spectra for the 586 brightest unresolved sources in one of the Murchison Widefield Array (MWA) EoR fields using 45h of observation. A novel peeling scheme is used to subtract 2500 sources from the visibilities with ionospheric and beam corrections, resulting in the deepest, confusion-limited MWA image so far. The resulting spectra are found to be affected by instrumental effects, which limit the constraints that can be set on source-intrinsic spectral structure. The sensitivity and power-spectrum of the spectra are analysed, and it is found that the spectra of residuals are dominated by point spread function sidelobes from nearby undeconvolved sources. We release a catalogue describing the spectral parameters for each measured source.2016MNRAS.458.1057Ohttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/458/1057CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/458/1057https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/458/1057http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/458/1057https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/458/1057https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/458/1057http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/458/1057GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/458/1057/table4 (Catalog of sources in the central 10{deg} radius of the EoR0 field)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/458/1057/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/458/1057/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/458/1057/table4?GETtext/xml+votable180.050000true0.017083-28.4056110.0055555555555555565/4102-4103 4108 4114-4115 4117 4119 4122-4123 4127-4128 4130 4132 4134-4136 4139 4141 4147-4148 4151-4153 4155 4162 4170-4171 4193-4195 4200 4225 4231 4240-4241 4245 6/16399 16403 16405-16407 16419-16420 16422 16424 16427 16431 16438 16440-16442 16445-16449 16451-16454 16464 16466 16472 16475 16480-16482 16484 16486-16487 16496-16497 16499-16502 16504 16506-16507 16516 16518 16524 16526-16527 16532-16534 16548-16549 16551 16554-16555 16560-16561 16568 16570-16574 16576-16577 16579 16581-16584 16586-16587 16596-16597 16599-16601 16603 16616-16617 16619 16625-16627 16629-16633 16635 16637-16638 16640 16642-16643 16654 16672 16675-16676 16678-16679 16690 16696 16698 16769-16771 16784-16786 16792 16794 16806-16809 16811-16814 16816 16818 16908-16909 16912-16913 16915-16918 16920-16921 16923 16948-16949 16968-16970 16972 16974-16975 16978-16979 16984 16986-16989 16991-16993 16995 16997 17008-17009 17012 17154-17156 17158 35567 35578-35579 46557 46581 465831.1131796728038537e-25 1.1131796728038537e-25https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/458/1057?format=asciiRadiodefaultJ/MNRAS/458/1057/table4Catalog of sources in the central 10{deg} radius of the EoR0 fieldrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMWAEORMWAEOR designation (JHHMMSS+DDMMSS)meta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainS168MHzFlux density at 168MHzJyphot.flux.density;em.radio.100-200MHzfloate_S168MHzrms uncertainty on S168MHzJystat.errorfloatalphaSpectral index alpha at 168MHz (1)spect.indexfloate_alpharms uncertainty on alphastat.error;pos.eq.rafloatbetaSpectral curvature beta at 168MHz (1)spect.indexfloate_betarms uncertainty on betastat.errorfloat