J/MNRAS/522/1951ivo://CDS.VizieR/J/MNRAS/522/1951CDSDal Ponte M.Santiago B.Carnero Rosell A.De Paris L.Pace A.B.,Bechtol K.Abbott T.M.C.Aguena M.Allam S.Alves O.Bacon D.,Bertin E.Bocquet S.Brooks D.Burke D.L.Carrasco Kind M.,Carretero J.Conselice C.Costanzi M.Desai S.De Vicente J.Doel P.,Everett S.Ferrero I.Flaugher B.Frieman J.Garcia-Bellido J.,Gerdes D.W.Gruendl R.A.Gruen D.Gutierrez G.Hinton S.R.,Hollowood D.L.James D.J.Kuehn K.Kuropatkin N.Marshall J.L.,Mena-fernandez J.Menanteau F.Miquel R.Ogando R.L.C.Palmese A.,Paz-chinchon F.Pereira M.E.S.Plazas Malagon A.A.Pieres A.Raveri M.,Rodriguez-Monroy M.Sanchez E.Scarpine V.Schubnell M.,Sevilla-Noarbe I.Smith M.Soares-Santos M.Suchyta E.Swanson M.E.C.,Tarle G.Thomas D.To C.Weaverdyck N.(the Des Collaboration)2026-09-03T13:35:24Z2026-09-03T14:16:34ZCDS support team

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

cds-question@unistra.frmilky-way-galaxydwarf-starsm-starsl-dwarfsphotometryvisible-astronomyinfrared-astronomystellar-spectral-typesstellar-distancetrigonometric-parallaxproper-motionsvariable-starsWe present a sample of 19583 ultracool dwarf candidates brighter than z <= 23 selected from the Dark Energy Survey DR2 coadd data matched to VHS DR6, VIKING DR5, and AllWISE covering ~ 480 deg^2^. The ultracool candidates were first pre-selected based on their (i-z), (z-Y), and (Y-J) colours. They were further classified using a method that compares their optical, near-infrared, and mid-infrared colours against templates of M, L, and T dwarfs. 14099 objects are presented as new L and T candidates and the remaining objects are from the literature, including 5342 candidates from our previous work. Using this new and deeper sample of ultracool dwarf candidates we also present: 20 new candidate members to nearby young moving groups and associations, variable candidate sources and four new wide binary systems composed of two ultracool dwarfs. Finally, we also show the spectra of 12 new ultracool dwarfs discovered by our group and presented here for the first time. These spectroscopically confirmed objects are a sanity check of our selection of ultracool dwarfs and photometric classification method.2023MNRAS.522.1951Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/522/1951CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/499/5302 : Ultracool dwarfs in wide binaries (dal Ponte+, 2020)J/MNRAS/489/5301 : DES Y3 substellar LT and M catalogs (Carnero Rosell+, 2019)J/A+A/619/L8 : Ultra-cool dwarfs candidates in Gaia DR2 (Reyle, 2018)J/A+A/589/A49 : Photometric brown-dwarf classification (Skrzypek+, 2016)J/ApJ/911/109 : RR Lyrae variable stars in DES Y6 (Stringer+, 2021)J/ApJ/710/1627 : Mid-IR photometry of cold brown dwarfs (Leggett+, 2010)J/ApJ/564/421 : Spectra of T dwarfs. I. (Burgasser+, 2002)J/ApJS/253/7 : A full-sky census of brown dwarfs within 20pcJ/ApJS/234/1 : Catalog of M, L, & T dwarfs from PS1 3{pi} SurveyJ/AJ/157/231 : MLSDSS-GaiaDR2 sample of M and L dwarfs (Kiman+, 2019)J/AJ/153/95 : Catalog of Suspected Nearby Young Stars (Riedel+, 2017)J/AJ/150/57 : SLoWPoKES-II catalog (Dhital+, 2015)J/AJ/149/158 : The BUD sample. I. L dwarf activity sample (Schmidt+, 2015)J/AJ/141/97 : SDSS DR7 M dwarfs (West+, 2011)J/AJ/133/439 : Luminosity function of M7-L8 ultracool dwarfs (Cruz+, 2007)VII/233 : 2MASS All-Sky Extended Source Catalog (XSC)II/371 : The Dark Energy Survey (DES): Data Release 2 (Abbott+, 2021)II/365 : The CatWISE2020 catalog (updated version 28-Jan-2021)II/359 : The VISTA Hemisphere Survey (VHS) catalog DR4.1II/329 : VIKING catalogue data release 1 (Edge+, 2013)II/314 : UKIDSS-DR8 LAS, GCS and DXS Surveys (Lawrence+ 2012)I/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/522/1951https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/522/1951http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/522/1951https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/522/1951https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/522/1951http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/522/1951GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/522/1951/table (Astrometrics and photometry data of the ultra cool dwarfs candidate sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/522/1951/table?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/522/1951/table?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/522/1951/table?GETtext/xml+votable180.050000true0.015775-52.920651110.0055555555555555563/524 543 721 4/1028-1029 1095 1101-1104 1106 1108 1112 1122-1123 1128 1130 1174 1178 1189-1190 1193 1290 1314-1315 1320-1321 2078 2104 2107 2109-2110 2114 2116 2120-2122 2124-2126 2131 2136 2139 2141-2142 2145 2147 2150 2153-2154 2161 2164 2166 2169-2170 2177 2181 2183-2184 2186 2189-2190 2192-2194 2196 2207 2209-2212 2216-2217 2223 2227-2230 2232-2234 2243-2244 2246 2248-2250 2256-2258 2265 2268 2270 2279 2288 2291 2297 2845 2847 2866-2870 2873-2875 2877-2878 2881-2882 2888 2890 2892-2894 2896-2898 2900 2914 2920-2921 5/4096 4099-4100 4102-4103 4109 4120-4121 4124 4160 4167 4171 4173-4174 4178 4181 4183 4185 4187-4188 4319 4339 4341-4343 4349 4352 4372 4377 4379 4399 4401 4403 4421 4423 4429-4431 4437-4438 4440-4442 4444 4452-4454 4456-4458 4483 4485-4487 4496-4497 4499 4501-4504 4506 4516-4518 4524 4528 4544 4671 4687 4691-4694 4707-4710 4771 4776-4777 4864 5121 5123-5124 5126 5128-5129 5132-5133 5135 5156-5157 5168 5177 5248 5250-5252 5254-5255 5270 5273-5275 5289-5292 5632 8287 8294-8295 8297 8299-8300 8302-8303 8305-8307 8309-8310 8317-8319 8343 8347 8349-8350 8363-8366 8370-8374 8376-8378 8380-8381 8383 8400-8402 8404 8406 8408 8410-8413 8415 8421-8424 8426-8427 8433-8435 8444-8446 8453-8455 8460 8462-8463 8470-8473 8475-8478 8492-8493 8495 8508-8510 8514 8518-8521 8523 8530 8533-8534 8536-8538 8541 8543 8548-8549 8552-8554 8561-8563 8572 8574-8577 8579 8584 8586-8587 8593-8594 8596-8597 8599 8607-8608 8610-8611 8620 8624 8627 8629-8630 8633-8634 8636-8638 8640-8642 8648-8649 8652 8654-8655 8660-8662 8668 8670 8672-8674 8684 8686-8687 8704-8706 8713-8717 8719-8720 8722-8723 8728-8729 8731 8740 8742-8743 8748 8750-8754 8764-8766 8780-8781 8783 8788 8790 8792-8794 8796 8799 8801-8802 8805 8807-8808 8815-8816 8819-8820 8823-8824 8827 8834-8835 8854-8858 8873-8876 8879 8883 8885-8887 8889-8891 8902-8904 8906-8907 8924 8940 8944 8960 8964-8965 8967 8971 8980-8982 8988-8989 9004-9005 9008-9009 9013-9015 9036-9038 9040-9042 9044-9045 9047 9049-9052 9056 9059 9064 9066-9070 9077-9078 9086 9088 9109-9110 9113-9114 9125-9127 9129-9132 9136 9138-9142 9145 9147-9148 9150 9156-9158 9160 9162-9163 9168-9170 9176-9178 9184 9186 9192 9194-9196 9198-9199 9202 9214 11355 11357-11359 11373-11374 11377 11379 11384-11385 11423 11447 11453 11457-11459 11462-11463 11485-11490 11504 11506 11516-11518 11521-11523 11532 11534-11535 11556 11558-11559 11564-11566 11580 11583 11596-11597 11599 11604 11606-11607 11612 11616-11618 11620-11622 11624-11626 11648-11649 11651-11652 11654-11655 11660 11662-11663 11665 11667-11670 11672-11674 11676 11688-11690 11696 11712 11841 11845 11847 11856-11858 11860-11862 11864-11865 6/0 2-3 16388 16390 16392-16393 16395 16405-16407 16420 16432-16433 16488-16489 16492-16493 16500-16502 16504-16506 16644-16646 16648-16650 16656 16660-16662 16665-16667 16677-16679 16682-16683 16688 16690-16691 16700-16702 16705-16710 16717-16719 16723 16728 16731 16737-16739 16744-16746 16756 16760 16773 16784-16785 16788-16789 16832 16836 17269 17275 17361-17363 17381 17393-17394 17401 17403-17405 17407 17412 17416 17477 17487 17493-17495 17497-17501 17503 17512 17515 17591 17601 17603 17611 17680-17682 17688 17690-17691 17712-17713 17715 17744-17746 17756-17758 17772-17774 17784 17821-17822 17836-17838 17840-17842 17856-17858 17860 17864 17927 17929 17931 17936-17937 17939 17992-17993 18000 18002-18003 18020 18022-18023 18028-18030 18032-18034 18076-18078 18104 18120 18678-18679 18681 18683 18741 18743 18745-18747 18757-18759 18762-18763 18780-18782 18800-18802 18804 18822-18823 18825-18827 18844-18846 18864-18866 18880-18882 18998-18999 19001 19003 19005-19007 19013 19015 19019-19021 19023 19056-19058 19078 19083 19112-19113 19116-19118 19120-19122 19136-19138 19140 19144 19200-19202 19204 19464 20480 20483 20489-20491 20508 20510 20521-20522 20536-20537 20539 20578 20584 20586 20608 20615-20616 20618 20621-20623 20633-20636 20656 20666 20686 20717-20720 20722 20728-20729 20996-20998 21012 21059-21062 21064-21066 21070-21071 21074-21075 21084 21086 21088 21090-21091 21105-21107 21152 21154-21155 21176 21184 21186 21188 21192 22532 22562 22568 22570 33131 33134-33135 33141-33142 33145-33147 33166-33167 33171 33174-33175 33193 33195 33204-33205 33207 33217-33219 33232 33234-33235 33244-33245 33247 33265-33267 33367 33371 33383 33393-33395 33404-33406 33435 33437-33439 33447 33468 33470-33474 33476-33478 33500-33501 33503 33517-33518 33529 33531 33613-33615 33620-33622 33628-33630 33636-33637 33639 33657-33659 33681-33683 33701-33703 33728-33729 33731 33788-33789 33791 33803 33805-33807 33809-33811 33845-33847 33873-33874 33878-33879 33896-33898 33916-33918 33977-33979 34045-34047 34050 34053-34055 34061-34063 34067 34070 34088-34090 34114-34117 34119 34125-34128 34130-34131 34140 34143 34156 34158-34160 34163 34169-34171 34200 34202-34204 34206-34207 34221 34223 34240 34243 34292-34294 34312 34314-34315 34341-34343 34368-34369 34371 34380-34382 34392 34394-34395 34417-34419 34421-34425 34427 34436-34437 34439 34488 34491 34493-34494 34500 34503 34507 34512 34514-34515 34525-34527 34529-34531 34540-34541 34543 34556 34558-34559 34573-34575 34601-34604 34606-34607 34612-34613 34615 34652 34654-34655 34676 34678-34679 34684 34686-34687 34700 34702-34703 34740-34742 34828-34829 34831 34848-34849 34851 34873-34875 34884 34886 34920-34921 34923 34964-34965 34967 34997-34999 35020 35022-35023 35068-35069 35071 35128-35130 35156-35158 35164-35166 35181-35183 35188 35191-35192 35195 35200 35202-35203 35212 35216-35217 35219 35225 35227 35239-35240 35245-35246 35249-35252 35255-35256 35268 35275 35285-35287 35289-35291 35300 35302-35303 35305-35307 35329-35331 35333-35335 35408 35410-35411 35414 35436 35438-35442 35444 35447-35448 35451 35453-35455 35489-35491 35508 35511-35512 35520 35522-35524 35527-35528 35536-35538 35552-35554 35585 35587-35588 35591-35592 35597-35602 35605-35607 35621-35623 35700-35702 35704-35706 35708 35764-35766 35768-35770 35780-35782 35784-35786 35788 35807 35821-35823 35826-35828 35830 35832 35834 35838-35839 35844 35847-35848 35851 35853-35855 35865-35867 35873 35875 35877-35879 35881-35883 35934-35935 35960-35962 35965-35967 36024-36026 36040-36042 36045 36047 36049-36051 36077-36081 36083-36084 36086-36090 36093-36095 36157-36159 36172-36174 36184-36185 36187 36192-36194 36212-36214 36216 36218-36219 36221-36223 36228-36230 36233-36235 36261-36263 36284 36286-36287 36304 36306-36307 36316-36318 36337-36340 36342 36348 36350 36356-36358 36360-36362 36382-36384 36386 36395 36397-36399 36402-36406 36408-36410 36415 36417-36422 36424-36426 36430-36431 36435 36444-36445 36447 36450-36451 36460 36462-36463 36481-36486 36488-36490 36494-36495 36497-36499 36515 36532-36533 36548 36550-36551 36573-36575 36577-36578 36585 36596 36598-36599 36604-36606 36636 36638-36639 36644-36645 36647 36684-36686 36688-36689 36696 36716 36740-36742 36748 36750-36751 36772-36774 36788 36790-36791 36802 36806 36812 36814-36815 36832-36834 36842 36847 36854 36860 36862-36863 38927 38945-38946 38948 38952 38954 39040 39562 39584 39586 39592 39594 39608 39610 45399 45406-45407 45425-45427 45467 45469-45471 45485-45487 45489 45491 45501-45504 45506-45507 45512 45514 45544-45545 45547 45549-45551 45655 45661-45663 45681 45683-45686 45689 45691 45781 45783 45787 45820-45821 45823 45825-45827 45840-45842 45844 45846-45847 45936-45938 45965-45967 46021-46023 46028-46029 46031 46076-46078 46081-46082 46132-46133 46135 46228 46230-46231 46268-46270 46324-46325 46327-46329 46331 46392 46394-46395 46420 46422-46423 46432-46434 46436 46438-46441 46443-46446 46456 46477-46479 46492-46494 46508 46510-46512 46514 46529-46532 46600-46602 46612 46614-46615 46644-46646 46656-46657 46659 46664 46666-46667 46684 46700-46701 46703 46708 46764 46766 46768-46770 46788 46856 47189 47361-47363 47369 47371-47373 47376-47377 47379 47413 47436 47438-47439 47452-47454 47464-47465 47468-47470 47472-47474 48128-48130https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/522/1951?format=asciiOpticalInfrareddefaultJ/MNRAS/522/1951/tableAstrometrics and photometry data of the ultra cool dwarfs candidate sampleCatWISE2020CatWISE2020 ID Number from proper motion section 5.2 only 1501 missing sources (CATWISE2020 OBJECT_ID)meta.id.assoccharNSCDR2NSC DR2 ID Number from proper motion section 5.2 only 640 missing sources (NSCDR2_ID)meta.id.assoccharFVarVariable object candidate as 291 yes for cross-match with DES Y6 RRab candidates of Stringer et al. 2021ApJ...911..109S, Cat. J/ApJ/911/109 (VARIABILITY_FLAG)meta.codecharAssosDisplay the DES/VHS/VIKING/AllWISE ancillary datameta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCoadIDDES DR2 ID Number (DES_COADD_OBJECT_ID)meta.id;meta.mainRAJ2000Right ascension (J2000) (DES_RA)degpos.eq.ra;meta.mainindexedDEJ2000Declination (J2000) (DES_DEC)degpos.eq.dec;meta.mainindexedDESimag? DES Y6 i band psf magnitude in AB System (DES_PSF_MAG_I)magphot.mag;em.opt.Idoublenullablee_DESimag[] Error in the DES Y6 i band psf magnitude (DES_PSF_MAG_I_ERR)magstat.error;phot.magdoubleDESzmagDES Y6 z band psf magnitude in AB System (DES_PSF_MAG_Z)magphot.mag;em.opt.Idoublee_DESzmagError in the DES Y6 z band psf magnitude (DES_PSF_MAG_Z_ERR)magstat.error;phot.magdoubleDESymagDES Y6 Y band psf magnitude in AB System (DES_PSF_MAG_Y)magphot.mag;em.IR.Jdoublee_DESymagError in the DES Y6 Y band psf magnitude (DES_PSF_MAG_Y_ERR)magstat.error;phot.magdoubleJap3magVHS or VIKING J band aper3 magnitude in Vega System (VHS_VIKING_JAPERMAG3)magphot.mag;em.IR.Jdoublee_Jap3magError in the VHS or VIKING J band aper3 magnitude (VHS_VIKING_JAPERMAG3_ERR)magstat.error;phot.magdoubleHap3mag? VHS or VIKING H band aper3 magnitude in Vega System (VHS_VIKING_HAPERMAG3)magphot.mag;em.IR.Hdoublenullablee_Hap3mag? Error in the VHS or VIKING H band aper3 magnitude (VHS_VIKING_HAPERMAG3_ERR)magstat.error;phot.magdoublenullableKsap3mag? VHS or VIKING Ks band aper3 magnitude in Vega System (VHS_VIKING_KSAPERMAG3)magphot.mag;em.IR.Kdoublenullablee_Ksap3mag? Error in the VHS or VIKING Ks band aper3 magnitude (VHS_VIKING_KSAPERMAG3_ERR)magstat.error;phot.magdoublenullableW1mag? AllWISE W1 band pro magnitude in Vega System (ALLWISE_W1)magphot.mag;em.IR.3-4umfloatnullablee_W1mag? Error in the AllWISE W1 band pro magnitude (ALLWISE_W1_ERR)magstat.error;phot.magfloatnullableW2mag? AllWISE W2 band pro magnitude in Vega System (ALLWISE_W2)magphot.mag;em.IR.4-8umfloatnullablee_W2mag? Error in the AllWISE W2 band pro magnitude (ALLWISE_W2_ERR)magstat.error;phot.magfloatnullableSPTypePhotometric spectral type ranging L0 to T9 with L0=10 and T9 = 29 from the updated template colours as presented in sect. 3 (PHOTO_TYPE)src.spTypeintDphotDistance calculated from apparent magnitudes in all the available bands (in parsecs) (PHOTOMETRIC_DISTANCE)pcpos.distancedoublee_DphotDistance uncertainty (PHOTOMETRIC_DISTANCE_UNC)pcstat.errordoubleGaiaDR3? Gaia DR3 ID Number from proper motion section 5.2 as 320 sources (GAIADR3_SOURCE_ID)meta.id.assocnullablePlx? Gaia DR3 parallax (in mas) (PLX)maspos.parallax.trigdoublenullablee_Plx? Error in Gaia DR3 parallax (in mas) (PLX_ERR)masstat.error;pos.parallaxfloatnullablepmRAgdr3? Gaia DR3 proper motion in right ascension direction (PMRA_GAIADR3)mas/yrpos.pm;pos.eq.radoublenullablee_pmRAgdr3? Error in Gaia DR3 proper motion in right ascension direction (PMRA_GAIADR3_ERR)mas/yrstat.error;pos.pm;pos.eq.rafloatnullablepmDEgdr3? Gaia DR3 proper motion in declination direction (PMDEC_GAIADR3)mas/yrpos.pm;pos.eq.decdoublenullablee_pmDEgdr3? Error in Gaia DR3 proper motion in declination direction (PMDEC_GAIADR3_ERR)mas/yrstat.error;pos.pm;pos.eq.decfloatnullablepmRAcwis? CatWISE2020 proper motion in right ascension direction (PMRA_CATWISE2020)mas/yrpos.pm;pos.eq.radoublenullablee_pmRAcwis? Error in CatWISE2020 proper motion in right ascension direction (PMRA_CATWISE2020_ERR)mas/yrstat.error;pos.pm;pos.eq.radoublenullablepmDEcwis? CatWISE2020 proper motion in declination direction (PMDEC_CATWISE2020)mas/yrpos.pm;pos.eq.decdoublenullablee_pmDEcwis? Error in CatWISE2020 proper motion in declination direction (PMDEC_CATWISE2020_ERR)mas/yrstat.error;pos.pm;pos.eq.decdoublenullablepmRAnsc? NSC DR2 proper motion in right ascension direction (PMRA_NSCDR2)mas/yrpos.pm;pos.eq.radoublenullablee_pmRAnsc? Error in NSC DR2 proper motion in right ascension direction (PMRA_NSCDR2_ERR)mas/yrstat.error;pos.pm;pos.eq.radoublenullablepmDEnsc? NSC DR2 proper motion in declination direction (PMDEC_NSCDR2)mas/yrpos.pm;pos.eq.decdoublenullablee_pmDEnsc? Error in NSC DR2 proper motion in declination direction (PMDEC_NSCDR2_ERR)mas/yrstat.error;pos.pm;pos.eq.decdoublenullable