J/MNRAS/473/2965ivo://CDS.VizieR/J/MNRAS/473/2965doi:10.26093/cds/vizier.74732965CDSMorgan J.S.Macquart J.-P.Ekers R.Chhetri R.Tokumaru M.,Manoharan P.K.Tremblay S.Bisi M.M.Jackson B.V.2024-08-17T20:21:32Z2021-02-10T15:00:05ZCDS support team

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

cds-question@unistra.frradio-sourcesradio-galaxiesinterferometryWe present the first dedicated observations of Interplanetary Scintillation (IPS) with the Murchison Widefield Array. We have developed a synthesis imaging technique, tailored to the properties of modern 'large-N' low-frequency radio telescopes. This allows us to image the variability on IPS time-scales across 900deg^2^ simultaneously. We show that for our observations, a sampling rate of just 2Hz is sufficient to resolve the IPS signature of most sources. We develop tests to ensure that IPS variability is separated from ionospheric or instrumental variability. We validate our results by comparison with existing catalogues of IPS sources, and near-contemporaneous observations by other IPS facilities. Using just 5 min of data, we produce catalogues at both 79 and 158MHz, each containing over 350 scintillating sources. At the field centre, we detect approximately one scintillating source per square degree, with a minimum scintillating flux density at 158MHz of 110mJy, corresponding to a compact flux density of approximately 400mJy. Each of these sources is a known radio source, however only a minority were previously known to contain sub-arcsecond components. We discuss our findings and the prospects they hold for future astrophysical and heliospheric studies.2018MNRAS.473.2965Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/473/2965CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/598/A78 : The GMRT 150MHz all-sky radio survey (Intema+, 2017)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/473/2965https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/473/2965http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/473/2965https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/473/2965https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/473/2965http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/473/2965GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/473/2965/table2 (High-band catalogue of scintillating sources)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/473/2965/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/473/2965/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/473/2965/table2?GETtext/xml+votable180.050000true0.00069-4.045380.005555555555555556Cone search capability for table J/MNRAS/473/2965/table3 (Low-band catalogue of scintillating sources)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/473/2965/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/473/2965/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/473/2965/table3?GETtext/xml+votable180.050000true0.1318-2.862150.0055555555555555565/4884 4903 6/2063 2081 2084 2088 2099 2178 2182 2218 2569 2610 2704 16762 16796 16799 16844 16869 16880 16886 17011 17015 17019 17095 17100 17110 17114 17119 17141 17146 17150 17158 17177-17178 17185 17192 17201 17210 17212-17213 17217 17220 17223-17225 17227 17230-17231 17237 17244 17247 17264-17265 17267 17273 17276 17306 17311 17316 17319 17327 17331 17333 17340-17341 17346-17347 17351-17352 17362 17365 17375-17376 17380 17383-17384 17388 17392-17393 17395 17399 17401-17402 17407 17450 17452 17507 17541 17544-17545 17547 17576-17577 17592 17606 17639 17793 17922 17925 17927 17933-17935 17937 17940 17950 17955 17963 17970 17972 17979 17983 17986 17992-17993 17999-18000 18017 18022 18026 18035 18041 18051-18052 18057-18058 18063 18065 18070 18072 18075 18079 18084 18089 18093 18096 18099 18103 18111-18113 18126 18132 18135 18140 18143-18144 18147 18150-18151 18153 18155 18157 18159 18161-18163 18170 18208 18210 18306-18307 18318-18320 18323 18329 18336 18339 18342 18349 18365 18367 18414 18505 18510 18649 18708-18710 18713 18718 18726 18737 18746 18752 18758 18763 18766 18769 18773 18783-18784 18791 18798 18806-18807 18812-18814 18824 18833 18845 18879 18883 18888 18890 18895 18898 18902 18913 18916 18928 18935 18939 19204 19239 19263 19282 19285 19290 19315 19325 19327 19398 19413 19426 19457 19459 19462 19465 19467 19469 19473 19475 19481 19483-19485 19493-19494 19498 19500-19501 19503 19505 19509 19513-19515 19519-19520 19522-19523 19530-19531 19533-19534 19541-19543 19546-19548 19553 19555-19558 19561 19563 19566 19569 19571-19572 19575-19577 19579 19581-19583 19585 19589-19590 19592 19599 19602 19604 19607 19609 19618 19621 19629 19631 19635 19638-19639 19644-19645 19647-19649 19651 19654 19656 19659-19662 19666 19668 19672-19673 19675 19679-19681 19684-19685 19688 19693 19695-19698 19700 19702-19703 19709-19710 19712-19713 19715 19717-19718 19723-19724 19726-19728 19730 19735 19741 19745-19747 19750 19752-19753 19757 19759 19761 19763 19765 19767 19770 19772 19779 19789 19791 19798 19809-19810 19817-19819 19837 19841-19842 19845-19846 19849-19851 19854 19856-19858 19860 19862 19865 19868 19870 19872-19873 19875 19883 19886 19888 19890 19893 19898 19900 19906 19908 19910 19928 19936 19939-19940 19944 19954 19960 19965 19975-19976 19982 20017 20029-20030 20032 20034 20036 20042-20043 20049-20051 20053 20055 20072 20083 20085-20086 20088-20089 20094 20099 20102 20110-20111 20129 20146 20163-20164 20167 20184 20192 20210 20229 20234 20236 20238 20245 20255-20256 20261 20264 20286 20288-20289 20298 20300 20306 20312 20321 20369 20377 20380 20388 20420 204335.214716656255829e-26 1.0469190402918975e-25https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/473/2965?format=asciiRadiodefaultJ/MNRAS/473/2965/table2High-band catalogue of scintillating sourcesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintName1Source name of best match, TGSSADR JHHMMSS.s+DDMMSSmeta.id;meta.modelledcharRAJ2000Right ascension (J2000.0) of best matchdegpos.eq.ra;meta.mainDEJ2000Declination (J2000.0) of best matchdegpos.eq.dec;meta.mainpmatch1Probability that best match is correct matchstat.fit.goodnessdoubleName2Source name of 2nd best match, TGSSADR JHHMMSS.s+DDMMSSmeta.idcharpmatch2Probability that 2nd best match is correct matchstat.fit.goodnessdoubleSTGSSADR flux density at 158MHz of best matchJyphot.flux.density;em.radio.100-200MHzdoublee_Srms uncertainty on SJystat.errordoubleElongSolar elongation on date of observationdegpos.ecliptic.londSScintillating flux density measuredJyphot.flux.density;em.radio.100-200MHzdoublee_dSrms uncertainty on dSJystat.errordoubleJ/MNRAS/473/2965/table3Low-band catalogue of scintillating sourcesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintName1Source name of best match, TGSSADR JHHMMSS.s+DDMMSSmeta.id;meta.modelledcharRAJ2000Right ascension (J2000.0) of best matchdegpos.eq.ra;meta.mainDEJ2000Declination (J2000.0) of best matchdegpos.eq.dec;meta.mainpmatch1Probability that best match is correct matchstat.fit.goodnessdoubleName2Source name of 2nd best match, TGSSADR JHHMMSS.s+DDMMSSmeta.idcharpmatch2Probability that 2nd best match is correct matchstat.fit.goodnessdoubleName3Source name of third best match best match, TGSSADR JHHMMSS.s+DDMMSSmeta.idcharpmatch3Probability that third best match best matchstat.fit.goodnessdoubleSVLSSr flux density at 78.7MHz of best matchJyphot.flux.density;em.radio.20-100MHzfloate_Srms uncertainty on SJystat.errordoubleElongSolar elongation on date of observationdegpos.ecliptic.londSScintillating flux density measuredJyphot.flux.density;em.radio.20-100MHzdoublee_dSrms uncertainty on dSJystat.errordouble