J/MNRAS/536/1057ivo://CDS.VizieR/J/MNRAS/536/1057doi:10.26093/cds/vizier.75361057CDSInight K.Gaensicke B.T.Schwope A.Anderson S.F.Breedt E.,Brownstein J.R.Demasi S.Friedrich S.Hermes J.J.Long K.S.,Mulvany T.Pallathadka G.A.Salvato M.Scaringi S.Schreiber M.R.,Stringfellow G.S.Thorstensen J.R.Tovmassian G.Zakamska N.L.2025-02-24T20:16:58Z2024-12-31T09:23:41ZCDS support team

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

cds-question@unistra.frcataclysmic-variable-starswhite-dwarf-starsvisible-astronomysloan-photometryorbitsSDSS-V is carrying out a dedicated survey for white dwarfs, single and in binaries, and we report the analysis of the spectroscopy of 504 cataclysmic variables (CVs) and CV candidates obtained during the first 34 months of observations of SDSS-V. We developed a convolutional neural network (CNN) to aid with the identification of CV candidates among the over 2 million SDSS-V spectra obtained with the BOSS spectrograph. The CNN reduced the number of spectra that required visual inspection to ~=2 per cent of the total. We identified 776 CV spectra among the CNN-selected candidates, plus an additional 27 CV spectra that the CNN misclassified, but that were found serendipitously by human inspection of the data. Analysing the SDSS-V spectroscopy and ancillary data of the 504 CVs in our sample, we report 61 new CVs, spectroscopically confirm 248 and refute 13 published CV candidates, and we report 82 new or improved orbital periods. We discuss the completeness and possible selection biases of the machine learning methodology, as well as the effectiveness of targeting CV candidates within SDSS-V. Finally, we re-assess the space density of CVs, and find 1.2x10^-5^pc^-3^2025MNRAS.536.1057Ihttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/536/1057CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/524/4867 : CVs from SDSS (Inight+, 2023)J/MNRAS/525/3597 : CVs from SDSS V (Inight+, 2023)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/536/1057https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/536/1057http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/536/1057https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/536/1057https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/536/1057http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/536/1057GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/536/1057/table1 (Summary of the spectroscopic samples used to train and test the CNN)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/536/1057/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/536/1057/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/536/1057/table1?GETtext/xml+votable180.050000true0.47976-67.12870.0055555555555555566/1242 1253 1781 1807 1816 1866 1929 2149 3041 3058 3235 3247 3287 3295 3299 3410 3589 3874 3886 4104 4117 4120 4129-4130 4138 4144 4196 4206 4216 4271 4341 4453 4723 4761 4768 4782 4804 4818 5064 5341 5485 5558 5569 5727 5809 5918 5947 6007 6052 6075 6148 6214 6223 6242 6245 6258 6266 6438-6439 6528 6530-6531 6598 6797 6799 7106 7210 7233 7306 7320 7577 7582 7636 7752 7917 7962 8085 8198 8224 8330 8359 8562 8755 9150 9165 9340 9467 9829 9849 9923 10055 10126 10153 10214 10232 10316 11072 11168 11217 11230 11351 11725 11760 11803 12106 12116 12135 12186 12321 12326 12419 12627 12630 12636 12932-12933 12975 14184 14254 14312 14336 14431 14452 14454 14625 14694 15099 15102 15165 15167 15177 15201 15205 15255 15340 15345-15346 15368 15373 15430 15531 15588-15590 15689-15690 15694 15786 15886 15894 15916 15944 15949 15974 16035 16046 16072 16078 16280 17723 17767 17818 17836 17983 17986 18027 18061 18071 18082 18095 18777 19062 19070 19076 19085 19089 19128 19134 19180 19197 19460 19523 19943 21572 21634-21635 21822 21831 21854-21855 21879 21907 21917 21949 21966 21984 22010 22020 22062 22140 22145 22166 22170 22197 22240 22247 22273 22280 22337 22340 22360 22362 22377 22384 22781 22789 22813 22830 22838 22840 22978 23100 23767 23940 23953 24288 24348 24506 25566-25567 25577 25818 25834 25933-25934 25950 25964 25982 26157 26161 26241 26554 26586 26588 26861 26898 26979 27161 27208 27291 27294 27301-27302 27309 27313 27325 27343 27362 27386 27446 27480 28082 29202 29400 29412 29739 29781 29826-29827 29836 29841 29844 29849 29877 29950 29969 30034 30041 30044 30052-30053 30075 30129 30142 30155 30172 30177 30180 30183 30196 30303 30324 30387 30450 30464 30468-30469 30473-30474 30500 30502 30521 30530 30543 30566 30570-30571 30588 30684 30764 30786 30788 30848 30982 30993 31000 31095 31145 31166 31192 31361 31397 31520 31535 31545 31584 31586 31588 31669 31681 31699-31701 31708 31747 31755 31764 31767 31778 31786 31804 31808 31819 31828 31836 31842 31850 31852 31866-31867 31873 31904 31942 31952 31965-31966 31972 31980 32017 32197 32273 32294 32423 32579 32581 33225 33284 33294 33296 33440 33448 33546 33574 33802 34884 37022 37201 37441 37443 37494 37535 37868 37917 38954-38955 39063 39428 40935 40955 40957 41238-41239 41281 41292 41323 41329 41332 41390 41589 41991 42002 42049 42072 42122 42124 42144 42148 42181 42192 42200 42271 42276 42337 42342 42347 42349 42493 42584 42617 42779 42903 43022 43056 44407 44926 45030 45493 45519 45579 45585 45666 45732 45739 45748 45751 45756-45757 45807 45815 45819 45823 45840 45854-45855 45859 45955 45958-45959 45961 45963 45987 45993 46102 46105 46254 47142 47147 47162 47181 47192 47210 47215 47217 47224 47263 47275 47279 47288 47313 47315 47331 47345 47496 48973 49070 49097 49100 49120 49129 491411.9867573869263685e-19 3.916500758235022e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/536/1057?format=asciiOpticaldefaultJ/MNRAS/536/1057/table1Summary of the spectroscopic samples used to train and test the CNNrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSDSSUnique reference for the SDSS object (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharNameOther name (where available)meta.idcharGaiaEDR3? The unique source_id of the Gaia EDR3 counterpart source_idmeta.idnullablePer? Orbital periodhtime.perioddoublenullablee_Per? Orbital period errorhstat.errordoublenullablen_Per[*: ] Note on Per (1)meta.notecharGmag? G-band magnitude from the Gaia EDR3 surveymagphot.mag;em.optdoublenullableDistance? Distance from Bailer-Jones et al. (2021AJ....161..147B, Cat. I/352)pcpos.distancedoublenullableVtypeClassification using the taxonomy defined in 2023MNRAS.524.4867I (2)meta.code.class;src.classcharRef-discBibCode of the earliest identification of this CVmeta.bib.bibcodecharRef-spBibCode of the first published spectrummeta.bib.bibcodecharRef-PBibCode of the source of the orbital periodmeta.bib.bibcodecharRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.main