J/A+A/556/A22ivo://CDS.VizieR/J/A+A/556/A22doi:10.26093/cds/vizier.35560022CDSTewes M.Courbin F.Meylan G.Kochanek C.S.Eulaers E.Cantale N.,Mosquera A.M.Magain P.Van Winckel H.Sluse D.Cataldi G.Voros D,Dye S.2017-06-29T08:56:17Z2013-07-19T08:21:10ZCDS support team

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

cds-question@unistra.frquasarsgravitational-lensingphotometryWe present the results from nine years of optically monitoring the gravitationally lensed z_QSO_=0.658 quasar RX J1131-1231. The R-band light curves of the four individual images of the quasar were obtained using deconvolution photometry for a total of 707 epochs. Several sharp quasar variability features strongly constrain the time delays between the quasar images. Using three different numerical techniques, we measured these delays for all possible pairs of quasar images while always processing the four light curves simultaneously. For all three methods, the delays between the three close images A, B, and C are compatible with being 0, while we measured the delay of image D to be 91 days, with a fractional uncertainty of 1.5% (1{sigma}), including systematic errors. Our analysis of random and systematic errors accounts in a realistic way for the observed quasar variability, fluctuating microlensing magnification over a broad range of temporal scales, noise properties, and seasonal gaps. Finally, we find that our time-delay measurement methods yield compatible results when applied to subsets of the data.2013A&A...556A..22Thttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/556/A22CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/391/481 : R-band photometry of SBS1520+530 (Burud+, 2002)J/A+A/433/757 : Optical polarization of 203 QSOs (Sluse+, 2005)J/AJ/132/999 : SDSS quasar lens search (Oguri+, 2006)J/A+A/488/481 : Time delays and H0 from WFI J2033-4723 (Vuissoz+, 2008)J/A+A/536/A53 : R-band light curves of HE 0435-1223 (Courbin+, 2011)J/A+A/528/A42 : VRi light curves of the lensed QSO HE 0435-1223 (Ricci+, 2011)J/A+A/553/A121 : 2 lensed quasars light curves (Eulaers+, 2013)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/556/A22https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/556/A22http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/556/A22https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/556/A22https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/556/A22http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/556/A22GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/556/A22/fig4R-band light curves of RX J1131-1231recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDJulian Date (heliocentric)dtime.epochdoubleAmagRelative magnitude of quasar image Amagphot.mag;arith.diffdoublee_AmagMagnitude uncertainty of quasar image Amagstat.error;phot.magdoubleBmagRelative magnitude of quasar image Bmagphot.mag;arith.diffdoublee_BmagMagnitude uncertainty of quasar image Bmagstat.error;phot.mag;em.opt.BdoubleCmagRelative magnitude of quasar image Cmagphot.mag;arith.diffdoublee_CmagMagnitude uncertainty of quasar image Cmagstat.error;phot.magdoubleDmagRelative magnitude of quasar image Dmagphot.mag;arith.diffdoublee_DmagMagnitude uncertainty of quasar image Dmagstat.error;phot.mag;arith.diffdoubleTelTelescope used: EulerC2, EulerCAM, Mercator or SMARTS (1)instr.setupchar