J/ApJ/894/78ivo://CDS.VizieR/J/ApJ/894/78doi:10.26093/cds/vizier.18940078CDSHuang X.Storfer C.Ravi V.Pilon A.Domingo M.Schlegel D.J.,Bailey S.Dey A.Gupta R.R.Herrera D.Juneau S.Landriau M.Lang D.,Meisner A.Moustakas J.Myers A.D.Schlafly E.F.Valdes F.Weaver B.A.,Yang J.Yeche C.2024-04-19T13:24:43Z2021-10-21T08:13:27ZCDS support team

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

cds-question@unistra.frgravitational-lensinginfrared-photometryvisible-astronomybroad-band-photometryredshiftedsurveysgalaxiesphotometryWe perform a semi-automated search for strong gravitational lensing systems in the 9000 deg2 Dark Energy Camera Legacy Survey (DECaLS), part of the Dark Energy Spectroscopic Instrument Legacy Imaging Surveys. The combination of the depth and breadth of these surveys are unparalleled at this time, making them particularly suitable for discovering new strong gravitational lensing systems. We adopt the deep residual neural network architecture developed by Lanusse+ (2018MNRAS.473.3895L) for the purpose of finding strong lenses in photometric surveys. We compile a training sample that consists of known lensing systems in the Legacy Surveys and the Dark Energy Survey as well as non-lenses in the footprint of DECaLS. In this paper we show the results of applying our trained neural network to the cutout images centered on galaxies typed as ellipticals in DECaLS. The images that receive the highest scores (probabilities) are visually inspected and ranked. Here we present 335 candidate strong lensing systems, identified for the first time.2020ApJ...894...78Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/894/78CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/284 : COSMOS Multi-Wavelength Photometry Catalog (Capak+, 2007)II/344 : KiDS-ESO-DR2 multi-band source catalog (de Jong+, 2015)J/ApJ/749/38 : CFHTLS-SL2S-ARCS strong lens candidates (More+, 2012)J/ApJ/755/31 : Compilation of 122 strong gravitational lenses (Cao+, 2012)J/MNRAS/465/4914 : R-band light curves of HE 0435-1223 (Bonvin+, 2017)J/ApJ/834/210 : Spectroscopy of strong lensing clusters (Carrasco+, 2017)J/ApJS/232/15 : Candidate strong lens systems from DES obs. (Diehl+, 2017)J/ApJ/856/68 : COSMOS lens candidates with LensFlow (Pourrahmani+, 2018)J/ApJ/857/144 : Tidal features from RESOLVE & DECaLS (Hood+, 2018)J/ApJS/247/12 : Strong lens models for 37 clusters from SGAS (Sharon+, 2020)J/MNRAS/500/859 : Ridges in the Dark Energy Survey (Moews+, 2021)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/894/78https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/894/78http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/894/78https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/894/78https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/894/78http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/894/78GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/894/78/lens (Grade A (Table 1), B (Table 2) and C (Table 3) candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/894/78/lens?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/894/78/lens?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/894/78/lens?GETtext/xml+votable180.050000true11.5084-1.94120.0055555555555555565/4420 4505 6/4150 4161 4177 4179 4247 4288 4307 4329 4432 4495 4528 4957 5299 8353 8374 8378 8514 8738 8853 8923-8924 9142 10256 10338 10434 12306 12316 16731 16733 16743 16747 16753-16754 16760 16762 16764 16888 17119 17141 17149 17239 17312 17420 17423 17431 17450 17453 17455 17481-17482 17485 17487 17496 17500 17507 17522 17599 17605 17607 17614 17622 17635 17638 17643 17669 17686 17689-17694 17730 17735 17741 17746-17747 17750 17752 17761 17769 17772 17780 17787-17788 17807 17816 17825 17828 17833 17873 17933 17938 17951 17957 17977 17980 17982 17984-17985 17990 17992-17993 17999 18004-18006 18010 18016 18019 18032 18034-18035 18038 18040 18043-18044 18068 18071 18077 18096 18099 18128-18129 18176 18180 18196 18200 18210 18787 19052 19104 19108-19109 19201 19459 21849 21864 22359 22761 22766 25599 25710 25772 25810 25822 25846 25849 25865 25872 25934 25963 25968 26080 26125 26266 26321 26377 26394 26404 26554 26854 26870 27043 27048 27171 27175 27202 27206 27208 27216 27219 27224 27229 27238 27244 27251 27253-27254 27256 27259 27302 27330 27367 27395 27458 27509 27549 27633 27800 27933 27943 28034 28039 28190 28197 28367 28379 28469 31149 31359 31447 31453 31510 31617-31619 31624-31625 31679 32419 36217 36219 36222 36271 36305 36308-36309 36311 36462 36471 36527 36543 36560 36563 36568 36573 36578-36579 36582 36586 36595 36632 36638 36740 36750 36766 36772 36783 36791 36796 36798 36834 40905 40935 449861.9810291497828372e-19 4.973527819473193e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/894/78?format=asciiOpticalInfrareddefaultJ/ApJ/894/78/lensGrade A (Table 1), B (Table 2) and C (Table 3) candidatesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameName of the source (DESI-DDD.dddd+DD.dddd; J2000)meta.id;meta.maincharQGrade of the lens candidate (A=high level of confidence)meta.code.qualcharTypeSource type (1)meta.codechargmag[17.44/29.52] CTIO/DECam g-band magnitudephot.mag;em.opt.Bfloatrmag[15.82/23.38] CTIO/DECam r-band magnitudephot.mag;em.opt.Rfloatzmag[14.95/20.87] CTIO/DECam z-band magnitudephot.mag;em.opt.IfloatProb[0.45/1] Probability (>0.9 = best lens candidates; see Section 4.2)stat.probabilityfloatSimbadNameSimbad column added by the CDSmeta.idcharnullablez[0.13/0.91]? Redshift from Survey; redshift uncertainties <3.7x10^-4^ for Grades A and B and <3.9x10^-4^ for Grade Csrc.redshiftfloatnullableSurveySurvey identifier (BOSS, eBOSS or SDSS) (2)meta.idcharDR8Display data from DESI DR8 (VII/292) within 2"meta.ref.urlcharSloanDisplay the online SDSS-DR16 data for the nearest objectmeta.ref.urlchar_RAPositions from names (right ascension part)degpos.eq.ra;meta.main_DEPositions from names (declination part)degpos.eq.dec;meta.main