J/A+A/619/A88ivo://CDS.VizieR/J/A+A/619/A88doi:10.26093/cds/vizier.36190088CDSMyserlis I.Komossa S.Angelakis E.Gomez J.L.Karamanavis V.,Krichbaum T.P.Bach U.Grupe D.2018-11-13T08:07:33Z2018-11-12T08:16:21ZCDS support team

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

cds-question@unistra.fractive-galactic-nucleibl-lacertae-objectspolarimetryradio-continuum-emissionvery-long-baseline-interferometryradio-sourcesmillimeter-astronomysubmillimeter-astronomyWe present a multifrequency, dense radio monitoring program of the blazar OJ287 using the 100-m Effelsberg radio telescope. The program aims to test different binary supermassive black hole (SMBH) scenarios and studying the physical conditions in the central region of this bright blazar. Between December 2015 and January 2017 (MJD 57370-57785), the radio electric vector position angle (EVPA) showed a large clockwise (CW) rotation by about 340{deg} with a mean rate of -1.04{deg}/day. Based on concurrent polarized Very Long Baseline Array (VLBA) data, the rotation seems to originate within the jet core at 43GHz. Optical polarization data show a similar monotonic CW EVPA rotation of about -1.1{deg}/day, superposed by shorter and faster rotations of about 7.8{deg}/day, mainly in the CW sense. When combined, the single dish, VLBI and optical polarization data are consistent with a polarized emission component propagating on a helical trajectory within a bent jet. We constrained the helix arc length (0.26pc) and radius (about 0.04pc) and the projected jet bending arc length (about 1.9-7.6pc). The helical trajectory covers only a part of the jet width, possibly its spine. In addition, we found a stable polarized component with EVPA (-10{deg}) perpendicular to the large scale jet, suggesting dominance of the poloidal magnetic field component.2018A&A...619A..88Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/619/A88CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJS/234/12 : MOJAVE XV. VLBA 15GHz obs. of AGN jets 1996-2016 (Lister+ 2018)J/A+A/609/A68 : Full-Stokes polarimetry of 5 radio sources (Myserlis+, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/619/A88https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/619/A88http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/619/A88https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/619/A88https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/619/A88http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/619/A88GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/619/A88/fig6pa (Integrated polarization angle - VLBA)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/619/A88/fig6pa?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/619/A88/fig6pa?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/619/A88/fig6pa?GETtext/xml+votable180.050000true133.7037520.10850.005555555555555556Cone search capability for table J/A+A/619/A88/list (List of fits files)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/619/A88/list?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/619/A88/list?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/619/A88/list?GETtext/xml+votable180.050000true133.7036520.108510.005555555555555556Cone search capability for table J/A+A/619/A88/fig1i (Stokes I - Effelsberg)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/619/A88/fig1i?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/619/A88/fig1i?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/619/A88/fig1i?GETtext/xml+votable180.050000true133.7037520.10850.005555555555555556Cone search capability for table J/A+A/619/A88/fig1ml (Linear polarization degree - Effelsberg)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/619/A88/fig1ml?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/619/A88/fig1ml?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/619/A88/fig1ml?GETtext/xml+votable180.050000true133.7037520.10850.005555555555555556Cone search capability for table J/A+A/619/A88/fig1pa (Polarization angle - Effelsberg)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/619/A88/fig1pa?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/619/A88/fig1pa?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/619/A88/fig1pa?GETtext/xml+votable180.050000true133.7037520.10850.005555555555555556Cone search capability for table J/A+A/619/A88/fig1mc (Circular polarization degree - Effelsberg)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/619/A88/fig1mc?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/619/A88/fig1mc?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/619/A88/fig1mc?GETtext/xml+votable180.050000true133.7037520.10850.005555555555555556Cone search capability for table J/A+A/619/A88/fig6i (Integrated Stokes I - VLBA)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/619/A88/fig6i?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/619/A88/fig6i?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/619/A88/fig6i?GETtext/xml+votable180.050000true133.7037520.10850.005555555555555556Cone search capability for table J/A+A/619/A88/fig6ml (Integrated linear polarization degree - VLBA)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/619/A88/fig6ml?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/619/A88/fig6ml?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/619/A88/fig6ml?GETtext/xml+votable180.050000true133.7037520.10850.0055555555555555566/4695https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/619/A88?format=asciiRadioMillimeterdefaultJ/A+A/619/A88/fig6paIntegrated polarization angle - VLBArecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintName[OJ287] Source namemeta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainFreq[15/43] Observed frequency (15 or 43)GHzem.freqintRadiusRadius of circular area around coremasphys.angSizefloatJDJulian datedtime.epochdoubleEVPAIntegrated polarization angle within radiusdegpos.posAng;phys.polarizationfloate_EVPA1-sigma uncertainty on EVPAdegstat.errorfloatJ/A+A/619/A88/listList of fits filesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension of center (J2000)degpos.eq.ra;meta.mainDEJ2000Declination of center (J2000)degpos.eq.dec;meta.mainNx[2048] Number of pixels along X-axismeta.numberintNy[2048] Number of pixels along Y-axismeta.numberintFreq[15.352/43.115] Observed frequency (15 or 43)GHzem.freqfloatObs.DateObservation datetime.epoch;obscharJDJulian datedtime.epochdoublesizeSize of FITS fileKibytephys.size;meta.fitsintFileNameName of FITS file, in subdirectory fitsmeta.id;meta.fitscharTitleTitle of the filemeta.title;meta.filecharJ/A+A/619/A88/fig1iStokes I - EffelsbergIStokes IJyphot.flux.density;em.opt.Ifloate_I1-sigma uncertainty on IJystat.errorfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintName[OJ287] Source namemeta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainFreq[2.64/43] Observed frequency (2.64, 4.85, 8.35, 10.45, 14.60, 19.00, 23.05, 32.00, 43.00)GHzem.freqfloatJDJulian datedtime.epochdoubleJ/A+A/619/A88/fig1mlLinear polarization degree - EffelsbergrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintName[OJ287] Source namemeta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainFreq[2.64/10.45] Observed frequency (2.64, 4.85, 8.35, 10.45)GHzem.freqfloatJDJulian datedtime.epochdoublemlLinear polarization degree%phys.polarization.linearfloate_ml1-sigma uncertainty on ml%stat.errorfloatJ/A+A/619/A88/fig1paPolarization angle - EffelsbergrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintName[OJ287] Source namemeta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainFreq[2.64/10.45] Observed frequency (2.64, 4.85, 8.35, 10.45)GHzem.freqfloatJDJulian datedtime.epochdoubleEVPAPolarisation angle (EVPA)degpos.posAng;phys.polarizationfloate_EVPA1-sigma uncertainty on EVPAdegstat.errorfloatJ/A+A/619/A88/fig1mcCircular polarization degree - EffelsbergJDJulian datedtime.epochdoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintName[OJ287] Source namemeta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainFreq[4.85/8.35] Observed frequency (4.85 or 8.35)GHzem.freqfloatmcCircular polarization degree%phys.polarization.circularfloate_mc1-sigma uncertainty on mcdegstat.errorfloatJ/A+A/619/A88/fig6iIntegrated Stokes I - VLBArecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintName[OJ287] Source namemeta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainFreq[15/43] Observed frequency (15 or 43)GHzem.freqintRadiusRadius of circular area around coremasphys.angSizefloatJDJulian datedtime.epochdoubleIIntegrated Stokes I within radiusJyphot.flux.density;em.opt.Ifloate_I1-sigma uncertainty on IJystat.errorfloatJ/A+A/619/A88/fig6mlIntegrated linear polarization degree - VLBAName[OJ287] Source namemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainFreq[15/43] Observed frequency (15 or 43)GHzem.freqintRadiusRadius of circular area around coremasphys.angSizefloatJDJulian datedtime.epochdoublemlIntegrated polarization degree within radius%phys.polarizationfloate_ml1-sigma uncertainty on ml%stat.errorfloat