J/MNRAS/484/3646ivo://CDS.VizieR/J/MNRAS/484/3646doi:10.26093/cds/vizier.74843646CDSSobey C.Bilous A.V.Griessmeier J.-M.Hessels J.W.T.Karastergiou A.,Keane E.F.Kondratiev V.I.Kramer M.Michilli D.Noutsos A.Pilia M.,Polzin E.J.Stappers B.W.Tan C.M.Leeuwen J.vanVerbiest J.P.W.,Weltevrede P.Heald G.Alves M.I.R.Ensslin T.Carretti E.Haverkorn M.,Iacobelli M.Reich W.Van Eck C.2024-08-19T20:16:38Z2019-02-27T09:30:18ZCDS support team

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

cds-question@unistra.frpulsarsmagnetic-fieldsWe determined Faraday rotation measures (RMs) towards 137 pulsars in the northern sky, using Low-Frequency Array (LOFAR) observations at 110-190MHz. This low-frequency RM catalogue, the largest to date, improves the precision of existing RM measurements on average by a factor of 20 - due to the low frequency and wide bandwidth of the data, aided by the RM synthesis method. We report RMs towards 25 pulsars for the first time. The RMs were corrected for ionospheric Faraday rotation to increase the accuracy of our catalogue to approximately 0.1rad/m^2^. The ionospheric RM correction is currently the largest contributor to the measurement uncertainty. In addition, we find that the Faraday dispersion functions towards pulsars are extremely Faraday thin - mostly less than 0.001rad/m^2^. We use these new precise RM measurements (in combination with existing RMs, dispersion measures, and distance estimates) to estimate the scale height of the Galactic halo magnetic field: 2.0(3)kpc for Galactic quadrants I and II above and below the Galactic plane (we also evaluate the scale height for these regions individually). Overall, our initial low-frequency catalogue provides valuable information about the 3-D structure of the Galactic magnetic field.2019MNRAS.484.3646Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/484/3646CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-tohttp://www.atnf.csiro.au/people/pulsar/psrcat : ATNF pulsar cataloguehttp://astron.nl/psrcensus : processed data and supplementary materialshttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/484/3646https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/484/3646http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/484/3646https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/484/3646https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/484/3646http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/484/3646GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/484/3646/tablea1 (Summary of RM measurements)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/484/3646/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/484/3646/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/484/3646/tablea1?GETtext/xml+votable180.050000true3.573958347.77594440.0055555555555555566/323 426 1079 1257 1676 1760 1949 2411 2439 2573 2787 2858 2874 3018 3234 3367 3552 3616 3731 3784 3872 4352 4403 4556 4598 4831 5955 6051 6262 7047 7049 7391 7821 8068 8121 8131 8277 8539 9040 9232 9240 9282-9283 9719 11371 12259 12500 12526 12565 12719 12747 12847 12871 12912 12939 12975 12993 13053 13065 13152 13191 13198 13218 13405 13460 13464-13465 13472 13719 13759 13921 14122 14273 14346 14375 14379 14394 14549 14842 14924 15009 15304 15496 15499 15512 15562 15646 15679 15751 15820 18153 18288 18421 19438 19994 20096 20166 23664 23727 23830 24040 24185-24186 24360 24428 24541 26520 26555 26824 27543 28106 28108 28226 29575 30541 30545 30548 30657 31591 31717 31829 31933 32007 32024 32048 32058 32140 32160 32218 32452 32546 32548 32558 32647 32704https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/484/3646?format=asciiRadiodefaultJ/MNRAS/484/3646/tablea1Summary of RM measurementsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameName of pulsar as in the ATNF catalogue v.1.59meta.id;meta.maincharJnameName of pulsar as in the ATNF catalogue v.1.59 based on J2000 coordinates.meta.idcharRMpsrcat? Faraday rotation measure (RM), if available, in the ATNF pulsar catalogue v.1.59rad.m**-2phys.dispMeasurefloatnullablee_RMpsrcat? RM uncertainty, if available, in the ATNF pulsar catalogue v.1.59rad.m**-2stat.errorfloatnullabler_RMpsrcatReference code for RM, if available, in the ATNF pulsar catalogue v.1.59meta.ref;pos.framecharMJDLOFAR observing epoch in modified Julian datedtime.epochdoubleS/NPeak S/N of the average total intensity (Stokes I) profile (1)stat.snrintNbinsNumber of pulse phase bins used to extract the Stokes parameters used to measure the RMsmeta.numberintNpbinsTotal number of pulse phase bins across the pulse profilemeta.numberintDMDispersion measure (1)pc.cm**-3phys.dispMeasure;instr.dispersiondoublee_DMDispersion measure uncertaintypc.cm**-3stat.errordoubleRMobsTotal observed RMrad.m**-2phys.dispMeasurefloate_RMobsTotal observed RM uncertaintyrad.m**-2stat.errorfloatRMionIonospheric RM contribution calculated using ionFR (2)rad.m**-2phys.dispMeasurefloate_RMionIonospheric RM uncertainty calculatedrad.m**-2stat.errorfloatRMISMRM ISM (=RMobs-RMion)rad.m**-2phys.dispMeasurefloate_RMISMRM ISM uncertaintyrad.m**-2stat.errorfloatBElectron density-weighted average magnetic field parallel to the LoSuGphys.magField;stat.meanfloate_BElectron density-weighted average magnetic field parallel to the LoS uncertaintyuGstat.errorfloatl_sRMUpper limit flag on sRMmeta.code.errorcharsRM? RM dispersion output from RM CLEANrad.m**-2stat.variancefloatnullableSimbadSimbad column added by the CDSmeta.ref.urlchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main