J/A+A/455/L1ivo://CDS.VizieR/J/A+A/455/L1doi:10.26093/cds/vizier.34559001CDSParaficz D.Hjorth J.Burud I.Jakobsson P.Eliasdottir A.2017-06-13T11:08:32Z2006-12-04T09:12:16ZCDS support team

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

cds-question@unistra.frquasarsgravitational-lensingphotometryWe have searched for microlensing variability in the light curves of five gravitationally lensed quasars with well-determined time delays: SBS 1520+530, FBQ 0951+2635, RX J0911+0551, B1600+434 and HE 2149-2745. By comparing the light curve of the leading image with a suitably time offset light curve of a trailing image we find that two (SBS 1520+530 and FBQ 0951+2635) out of the five quasars have significant long-term (~ years) and short-term (~100-days) brightness variations that may be attributed to microlensing. The short-term variations may be due to nanolenses 10^-4^-10^-3^M_{sun}_, relativistic hot or cold spots in the quasar accretion disks, or coherent microlensing at large optical depth.2006A&A...455L...1Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/455/L1CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/391/481 : R-band photometry of SBS1520+530 (Burud+, 2002)J/A+A/420/447 : VRI photometry of lensed quasar QSO B2237+0305 (Vakulik+, 2004)J/ApJ/409/28 : Gravitationally Lensed Quasars (Maoz + 1993)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/455/L1https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/455/L1http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/455/L1https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/455/L1https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/455/L1http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/455/L1GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tap2.367228618189496e-19 3.852589004194616e-19OpticaldefaultJ/A+A/455/L1/table3Phototmetric parameters for two image of quasar HE 2149-2745 in I-bandrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBand[IVR] Photometric bandinstr.bandpasscharmagADifferential magnitude of A componentmagphot.mag;em.opt.Ifloate_magAError on magAmagstat.errorfloatmagBDifferential magnitude of B componentmagphot.mag;em.opt.Ifloate_magBError on magBmagstat.errorfloatJDJulian datedtime.epochdoubleJ/A+A/455/L1/table4Phototmetric parameters for two image of quasar HE 2149-2745 in V-bandrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBand[IVR] Photometric bandinstr.bandpasscharmagADifferential magnitude of A componentmagphot.mag;em.opt.Vfloate_magAError on magAmagstat.errorfloatmagBDifferential magnitude of B componentmagphot.mag;em.opt.Vfloate_magBError on magBmagstat.errorfloatJDJulian datedtime.epochdoubleJ/A+A/455/L1/table5Phototmetric parameters for two image of quasar RX J0911+0551 in I-bandrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBand[IVR] Photometric bandinstr.bandpasscharmagADifferential magnitude of A componentmagphot.mag;em.opt.Ifloate_magAError on magAmagstat.errorfloatmagBDifferential magnitude of B componentmagphot.mag;em.opt.Ifloate_magBError on magBmagstat.errorfloatJDJulian datedtime.epochdoubleJ/A+A/455/L1/table6Phototmetric parameters for two image of quasar SBS 1520+530 in R-bandrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBand[IVR] Photometric bandinstr.bandpasscharmagADifferential magnitude of A componentmagphot.mag;em.opt.Rfloate_magAError on magAmagstat.errorfloatmagBDifferential magnitude of B componentmagphot.mag;em.opt.Rfloate_magBError on magBmagstat.errorfloatJDJulian datedtime.epochdoubleJ/A+A/455/L1/table7Phototmetric parameters for two image of quasar B1600+434 in I-bandrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBand[IVR] Photometric bandinstr.bandpasscharmagADifferential magnitude of A componentmagphot.mag;em.opt.Ifloate_magAError on magAmagstat.errorfloatmagBDifferential magnitude of B componentmagphot.mag;em.opt.Ifloate_magBError on magBmagstat.errorfloatJDJulian datedtime.epochdoubleJ/A+A/455/L1/table8Phototmetric parameters for two image of quasar FBQ 0951+2635 in R-bandJDJulian datedtime.epochdoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBand[R] Photometric bandinstr.bandpasscharmagAMagnitude of A componentmagphot.mag;em.opt.RfloatmagBMagnitude of B componentmagphot.mag;em.opt.Rfloate_magAMagnitude error of A componentmagstat.errorfloate_magBMagnitude error of B componentmagstat.errorfloatmag1Magnitude of reference starmagphot.mag;em.opt.Rfloate_mag1Magnitude error of reference starmagstat.errorfloatmag2Magnitude of reference starmagphot.mag;em.opt.Rfloate_mag2Magnitude error of reference starmagstat.errorfloat