J/A+A/618/A56ivo://CDS.VizieR/J/A+A/618/A56doi:10.26093/cds/vizier.36180056CDSDucourant C.Wertz O.Krone-Martins A.Teixeira R.Le Campion J.-F.,Galluccio L.Klueter J.Delchambre L.Surdej J.Mignard F.,Wambsganss J.Bastian U.Graham M.J.Djorgovski S.G.Slezak E.2020-02-21T08:55:33Z2018-10-12T08:15:37ZCDS support team

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

cds-question@unistra.frgravitational-lensingastrometryThanks to its spatial resolution the ESA/Gaia space mission offers a unique opportunity to discover new multiply-imaged quasars and to study the already known lensed systems at sub-milliarcsecond astrometric precisions. Aims : In this paper, we address the detection of the known multiply-imaged quasars from the Gaia Data Release 2 and determine the astrometric and photometric properties of the individually detected images found in the Gaia DR2 catalogue. We have compiled an exhaustive list of quasar gravitational lenses from the literature to search for counterparts in the Gaia Data Release 2. We then analyze the astrometric and photometric properties of these Gaia's detections. To highlight the tremendous potential of Gaia at the sub-milliarcsecond level we finally perform a simple Bayesian modeling of the well-known gravitational lens system HE0435-1223, using Gaia Data Release 2 and HST astrometry. From 478 known multiply imaged quasars, 200 have at least one image found in the Gaia Data Release 2. Among the 41 known quadruply-imaged quasars of the list, 26 have at least one image in the Gaia Data Release 2, 12 of which are fully detected (2MASX J01471020+4630433, HE 0435-1223, SDSS1004+4112, PG1115+080, RXJ1131-1231, 2MASS J11344050-2103230, 2MASS J13102005-1714579, B1422+231, J1606-2333, J1721+8842, WFI2033-4723, WGD2038-4008), 6 have three counterparts, 7 have two and 1 has only one. As expected, the modeling of HE0435-1223 shows that the model parameters are significantly better constrained when using Gaia astrometry compared to HST astrometry, in particular the relative positions of the background quasar source and the centroid of the deflector. The Gaia sub-milliarcsecond astrometry also significantly reduces the parameter correlations. Besides providing an up-to-date list of multiply imaged quasars and their detection in the Gaia DR2, this paper shows that more complex modeling scenarios will certainly benefit from Gaia sub-milliarcsecond astrometry.2018A&A...618A..56Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/618/A56CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/345 : Gaia DR2 (Gaia Collaboration, 2018)Aug/01 : Gaia GraL. III. New lensed systems (Delchambre+, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/618/A56https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/618/A56http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/618/A56https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/618/A56https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/618/A56http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/618/A56GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/618/A56/table4 (Compiled list of 478 known gravitationally lensed systems)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/618/A56/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/618/A56/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/618/A56/table4?GETtext/xml+votable180.050000true0.56625-1.474721940.0055555555555555566/8 558 1248 2331 2493 2820 4124 4135 4163 4179 4210 4315 4415 4442 4494-4495 4596 4615 4631 4650 4699 4713 4728 4764 4769 4793 4850 4876 4942 4990 5002 5098-5099 5164 5171 5190 5233 5259 5392 5398 5433 5450 5571 5619 5733 5739 5760 5817 5876 5905 5922-5923 5927 5943 5966 6017 6133 6166 6217 6364 6383 6470 6508 6539 6559 6578-6579 6598 6600 6608 6632 6926 6933 7051 7220 7242 7266 7309 7331 7334 7378 7385 7426 8286 8316 8378 8407 8423 8426 8451 8562 8611 8617 8670 8707 8748 8794 8842 8912 8915 8932 8959 9026 9046 9051 9130 9143 9148 9152 9198 9205-9206 9327 9342 9354 9387 9409 9528 9629 9639 9757 9790 9797 9821 9837 9850 9907 10033 10126 10334 10390 10408 10439 10461 10483 10491 10500 10583-10584 10662 10680 10687 10743 10873 10923 10925 10950 11063 11110 11223 11226 11252 11347 11364 11397-11398 11424 11496 11667 11804 11821 11942 12241 12285 12370 12631 12634 12675 12719 12763 12789 12804 13103 13365-13366 13370 13404 13613 15036 15176 15258 15896 15979 16536 16686 16836 16866 16943 16999 17117 17260 17278 17303 17334 17337 17340 17342-17343 17353 17361 17375 17380 17386 17390-17391 17402 17405 17461 17483 17510 17514 17607 17615 17622 17636 17638 17696 17727 17770 17803 17814-17815 17827 17829 17834 17840 17854 17856 17982 17985 17996-17997 18003 18005 18009 18012 18014 18017 18020 18022-18023 18026 18034 18053 18060 18065 18068 18071 18075 18101 18103 18106-18107 18114 18118 18125 18142 18147 18161 18164 18170 18172 18178 18212 18304 18309 18389 18703 18708 18712-18713 18717-18719 18750 18760 18767 18776 18786-18788 18804 18809 18824 18907 18939 19007 19109 19131 19162 19200 19216 19258 19307 19352 19357 19422 19460 19467 19478 19524 19739 19741 19974 19991 20073 20104 20200 20234 20389 20486 21000 21317 21854 21972 22007 22354 22581 23210 23339 23419 24950 25166 25245 25480 25592 25914 25957 26054 26222 26256 26266 26372 26381-26382 26460 26483 26489 26506 26525 26578 26618 26621 26886 26967 26970 27004 27075 27095 27107 27127 27135 27204 27232 27252 27256 27258 27273 27281 27318 27367 27373 27446 27460 27508 27510 27577 27635 27668 27727 27756 27978 28003 28005 28085-28086 28112 28115 28146 28245 28249 28260 28371 28449 28628 28633 29072 30036 31146 31402 31412 31434 31480 31598 31615 31641 31661 31690 31727 32479 32648 32994 33633 33762 33836 33963 33991 34033 34070 34291 34312 34437 34527 34681 34926 35035 35053 35067 35123 35218 35248 35935 36080 36331 36373 36427 36573 36620 36766 36834 40274 40957 43947 44354 44523 44673 44848 44927 45052 45526 45850 45891 45907 45943 46060 46193 46369 46603 46637 46737 46760 46987 47424 47434 47467 47473 47847 48389 48876 490411.9867573869263685e-19 3.916500758235022e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/618/A56?format=asciidefaultJ/A+A/618/A56/table4Compiled list of 478 known gravitationally lensed systemsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameName of the gravitational lens systemmeta.id;pos.framecharCompName of the image component (A, B, C, D, E); G for galaxymeta.code.multipcharNimgNumber of images of the GL with astrometry the discovery publicationmeta.numberintNgNumber of galaxies of the GL system with astrometry the discovery publicationmeta.numberintAuthorYear of publication and first author nametime.epochcharBibCodeBibliographic code of the publication of the discovery (when found)meta.bib.bibcodecharRAICRSRight ascension (ICRS, epoch=2000) of the GL's image from the discovery publicationpos.eq.ra;meta.mainDEICRSDeclination (ICRS, epoch=2000) of the GL's image from the discovery publicationpos.eq.dec;meta.mainDR2SId? Unique source identifier in Gaia DR2meta.idnullableRAGdeg? Gaia DR2 barycentric right ascension (ICRS) at Ep=2015.5 (1)degpos.eq.ranullablee_RAGdeg? Standard error of right ascension (e_RA*cosDE) (1)degstat.errorfloatnullableDEGdeg? Gaia DR2 barycentric declination (ICRS) at Ep=2015.5 (1)degpos.eq.decnullablee_DEGdeg? Standard error of declination (e_DE*cosDE) (1)degstat.errorfloatnullableGmag? G-band mean magnitude from Gaia DR2magphot.mag;em.optfloatnullablee_Gmag? Standard error of G-band mean magnitude (added by CDS)magstat.error;phot.mag;em.opt.BfloatnullablepmRA? Proper motion in right ascension direction (pmRA*cosDE) from Gaia DR2mas/yrpos.pm;pos.eq.rafloatnullablee_pmRA? Standard error of proper motion in right ascension direction from Gaia DR2mas/yrstat.error;pos.pm;pos.eq.rafloatnullablepmDE? Proper motion in declination direction from Gaia DR2mas/yrpos.pm;pos.eq.decfloatnullablee_pmDE? Standard error of proper motion in declination direction from Gaia DR2mas/yrstat.error;pos.pm;pos.eq.decfloatnullablePlx? Absolute stellar parallax from Gaia DR2maspos.parallaxdoublenullablee_Plx? Standard error of parallax from Gaia DR2masstat.error;pos.parallaxfloatnullableBPmag? Integrated BP mean magnitude from Gaia DR2magphot.mag;em.opt.Bfloatnullablee_BPmag? Standard error of BP mean magnitude (added by CDS)magstat.error;phot.magfloatnullableRPmag? Integrated RP mean magnitude from Gaia DR2magphot.mag;em.opt.Rfloatnullablee_RPmag? Standard error of RP mean magnitude (added by CDS)magstat.error;phot.magfloatnullabletestDR2[0/1] Flag of presence in GDR2 (2)meta.codecharStatus[0/1] Status of the lens system (3)meta.codechar