J/MNRAS/465/4914ivo://CDS.VizieR/J/MNRAS/465/4914doi:10.26093/cds/vizier.74654914CDSBonvin V.Courbin F.Suyu S.H.Marshall P.J.Rusu C.E.Sluse D.,Tewes M.Wong K.C.Collett T.Fassnacht C.D.Treu T.Auger M.W.,Hilbert S.Koopmans L.V.E.Meylan G.Rumbaugh N.Sonnenfeld A.,Spiniello C.2024-08-16T20:20:25Z2017-02-08T11:58:19ZCDS support team

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

cds-question@unistra.frquasarsgravitational-lensingphotometryWe present the results from thirteen years of optically monitoring the gravitationally lensed z_QSO_= 1.693 quasar HE 0435-1223. The R-band light curves of the four individual images of the quasar were obtained using deconvolution photometry for a total of 876 epochs. Several sharp quasar variability features strongly constrain the time delays between the quasar images. Using two different numerical techniques, we measured these delays for all possible pairs of quasar images while always processing the four light curves simultaneously. For both methods, the delays are compatible with the previous measurements presented in Courbin et al. (2011, Cat. J/A+A/536/A53) that used a subset of the present data and a different curve-shifting method. 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.2017MNRAS.465.4914Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/465/4914CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/391/481 : R-band photometry of SBS1520+530 (Burud+, 2002)J/A+A/528/A42 : VRi light curves of the lensed QSO HE 0435-1223 (Ricci+, 2011)J/A+A/536/A53 : R-band light curves of HE 0435-1223 (Courbin+, 2011)J/A+A/544/A51 : Lensed quasar UM673 R-band photometry (Koptelova+, 2012)J/A+A/551/A104 : Lensed QSO UM673/Q0142-100 VRi light curves (Ricci+, 2013)J/A+A/553/A121 : 2 lensed quasars light curves (Eulaers+, 2013)J/A+A/556/A22 : R-band light curves of RX J1131-1231 (Tewes+, 2013)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/465/4914https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/465/4914http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/465/4914https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/465/4914https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/465/4914http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/465/4914GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/MNRAS/465/4914/fig2R-band light curves of HE 0435-1223recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMHJDModified Julian Date (heliocentric)dtime.epochdoublemagARelative magnitude of quasar image Amagphot.mag;arith.diffdoublee_magAMagnitude uncertainty of quasar image Amagstat.errordoublemagBRelative magnitude of quasar image Bmagphot.mag;arith.diffdoublee_magBMagnitude uncertainty of quasar image Bmagstat.errordoublemagCRelative magnitude of quasar image Cmagphot.mag;arith.diffdoublee_magCMagnitude uncertainty of quasar image Cmagstat.errordoublemagDRelative magnitude of quasar image Dmagphot.mag;arith.diffdoublee_magDMagnitude uncertainty of quasar image Dmagstat.errordouble