J/ApJ/955/140ivo://CDS.VizieR/J/ApJ/955/140doi:10.26093/cds/vizier/ba-xv-4cCDSShalyapin V.N.Goicoechea L.J.Dyrland K.Dahle H.2026-07-02T12:00:43Z2026-01-07T12:21:02ZCDS support team

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

cds-question@unistra.frgravitational-lensingphotometryvisible-astronomyquasarsThe gravitational lens system PS J0147+4630 (Andromeda's Parachute) consists of four quasar images ABCD and a lensing galaxy. We obtained r-band light curves of ABCD in the 2017-2022 period from monitoring with two 2m class telescopes. Applying state-of-the-art curve-shifting algorithms to these light curves led to measurements of time delays between images, and the three independent delays relative to image D are accurate enough to be used in cosmological studies (uncertainty of about 4%): {Delta}t_AD_=-170.5{\pm}7.0, {Delta}t_BD_=-170.4{\pm}6.0, and {Delta}t_CD_=-177.0{\pm}6.5days, where image D is trailing all the other images. Our finely sampled light curves and some additional fluxes in the years 2010-2013 also demonstrated the presence of significant microlensing variations. From the measured delays relative to image D and typical values of the external convergence, recent lens mass models yielded a Hubble constant that is in clear disagreement with currently accepted values around 70km.s^-1^Mpc^-1^. We discuss how to account for a standard value of the Hubble constant without invoking the presence of an extraordinary high external convergence.2023ApJ...955..140Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/955/140CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/MNRAS/465/4914 : R-band light curves of HE 0435-1223 (Bonvin+, 2017)J/A+A/605/L8 : Spectra of lensed QSO PSOJ0147 (Lee, 2017)J/MNRAS/467/4220 : Galaxies inside 120 arcsec of HE 0435-1223 (Rusu+, 2017)J/A+A/616/A183 : R-band light curves of PG 1115+080 (Bonvin+, 2018)J/ApJ/887/126 : Follow-up of PSJ0147+4630 lens system (Goicoechea+, 2019)J/ApJ/905/7 : g- & r- LCs of Q0957+561 & SBS0909+532 (Cornachione+, 2020)J/A+A/637/A89 : QSO 2237+0305 photometry & light curves (Goicoechea+, 2020)J/A+A/640/A105 : R-band light curves of 23 lensed QSOs (Millon+, 2020)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/955/140https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/955/140http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/955/140https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/955/140https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/955/140http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/955/140GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/ApJ/955/140/table2New r-band light curves of PS J0147+4630ABCD and the control star S.recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJD[7970/9883] Julian Date of Observation, JD-2450000.5dtime.epochdoublermagA[15.89/16.06] r-band SDSS magnitude of quasar image Amagphot.mag;em.opt.Rfloate_rmagA[0.004/0.03] Uncertainty in rmagAmagstat.error;phot.mag;em.opt.RfloatrmagB[16.15/16.33] r-band SDSS magnitude of quasar image Bmagphot.mag;em.opt.Rfloate_rmagB[0.005/0.03] Uncertainty in rmagBmagstat.error;phot.mag;em.opt.RfloatrmagC[16.45/16.66] r-band SDSS magnitude of quasar image Cmagphot.mag;em.opt.Rfloate_rmagC[0.006/0.04] Uncertainty in rmagCmagstat.error;phot.mag;em.opt.RfloatrmagD[18.16/18.39] r-band SDSS magnitude of quasar image Dmagphot.mag;em.opt.Rfloate_rmagD[0.008/0.05] Uncertainty in rmagDmagstat.error;phot.mag;em.opt.RfloatrmagS[15.38/15.46] r-band SDSS magnitude of control star Smagphot.mag;em.opt.Rfloate_rmagS[0.004/0.05] Uncertainty in rmagSmagstat.error;phot.mag;em.opt.RfloatTelTelescope used; "LT" (Liverpool Telescope) or "NOT" (Nordic Optical Telescope)meta.id;instr.telchar