J/A+A/651/A108ivo://CDS.VizieR/J/A+A/651/A108doi:10.26093/cds/vizier.36510108CDSPoliszczuk A.Pollo A.Malk K.Durkalec A.Pearson W.J.Goto T.,Kim S.-J.Malkan M.Oi N.Ho S.C.-C.Shim H.Pearson C.Hwang H.-S.,Toba Y.Kim E.2022-01-17T11:28:50Z2021-07-27T07:40:01ZCDS support team

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

cds-question@unistra.fractive-galactic-nucleiastrometryphotometryThe North Ecliptic Pole (NEP) field provides a unique set of panchromatic data, well suited for active galactic nuclei (AGN) studies. Selection of AGN candidates is often based on mid-infrared (MIR) measurements. Such method, despite its effectiveness, strongly reduces a catalog volume due to the MIR detection condition. Modern machine learning techniques can solve this problem by finding similar selection criteria using only optical and near-infrared (NIR) data. Aims of this work were to create a reliable AGN candidates catalog from the NEP field using a combination of optical SUBARU/HSC and NIR AKARI/IRC data and, consequently, to develop an efficient alternative for the MIR-based AKARI/IRC selection technique. A set of supervised machine learning algorithms was tested in order to perform an efficient AGN selection. Best of the models were formed into a majority voting scheme, which used the most popular classification result to produce the final AGN catalog. Additional analysis of catalog properties was performed in form of the spectral energy distribution (SED) fitting via the CIGALE software. The obtained catalog of 465 AGN candidates (out of 33119 objects) is characterized by 73% purity and 64% completeness. This new classification shows consistency with the MIR-based selection. Moreover, 76% of the obtained catalog can be found only with the new method due to the lack of MIR detection for most of the new AGN candidates. Training data, codes and final catalog are available via the github repository. Final AGN candidates catalog is also available via the CDS service.2021A&A...651A.108Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/651/A108CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/PASJ/59/S529 : NEP deep survey at 11um (Lee+, 2007)J/A+A/517/A54 : 20cm survey of the AKARI NEP (White+, 2010)J/ApJS/190/166 : Optical catalog of AKARI NEP-wide survey (Jeon+, 2010)J/A+A/537/A24 : AKARI NEP-Deep field mid-IR source catalogue (Takagi+, 2012)J/A+A/548/A29 : IR source catalog of AKARI NEP-Wide field (Kim+, 2012)J/A+A/559/A132 : AKARI NEP Deep Survey revised catalog (Murata+, 2013)J/ApJS/207/37 : IR sources spectroscopy in the AKARI NEP (Shim+, 2013)J/A+A/566/A60 : Optical-NIR catalog of AKARI NEP Deep Field (Oi+, 2014)J/ApJS/214/20 : AKARI NEP field J- and H- band source catalog (Jeon+, 2014)J/MNRAS/444/846 : AKARI NEP Survey sources at 18um (Pearson+, 2014)J/MNRAS/446/911 : X-ray sources in the AKARI NEP deep field (Krumpe+, 2015)J/A+A/645/A95 : NEP raster ROSAT X-ray/Optical catalog (Hasinger+, 2021)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/651/A108https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/651/A108http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/651/A108https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/651/A108https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/651/A108http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/651/A108GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/651/A108/catalog (Catalog of AGN candidates (465 objects))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/651/A108/catalog?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/651/A108/catalog?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/651/A108/catalog?GETtext/xml+votable180.050000true269.411285465.23753360.0055555555555555565/4010 6/10237 10239 11605-11607 15358-15359 160467.665958069654821e-21 9.776927937927772e-20https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/651/A108?format=asciidefaultJ/A+A/651/A108/catalogCatalog of AGN candidates (465 objects)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainAKRID of the object in the AKARI database.meta.id;meta.mainintHSCID of the object in the North Ecliptic Pole SUBARU/HSC catalog (1)meta.idgmagBrightness in g filter of SUBARU/HSC (AB)magphot.mag;em.opt.Bfloate_gmaggmag measurement uncertaintymagstat.error;phot.magfloatrmagBrightness in r filter of SUBARU/HSC (AB)magphot.mag;em.opt.Rfloate_rmagrmag measurement uncertaintymagstat.error;phot.magfloatimagBrightness in i filter of SUBARU/HSC (AB)magphot.mag;em.opt.Ifloate_imagimag measurement uncertaintymagstat.error;phot.magfloatzmagBrightness in z filter of SUBARU/HSC (AB)magphot.mag;em.opt.Ifloate_zmagzmag measurement uncertaintymagstat.error;phot.magfloatYmagBrightness in Y filter of SUBARU/HSC (AB)magphot.mag;em.IR.Jfloate_YmagYmag measurement uncertaintymagstat.error;phot.magfloatN2magBrightness in N2 filter of AKARI/IRC (AB)magphot.mag;em.IR.8-15umfloate_N2magN2mag measurement uncertaintymagstat.error;phot.magfloatN3magBrightness in N3 filter of AKARI/IRC (AB)magphot.mag;em.IR.8-15umfloate_N3magN3mag measurement uncertaintymagstat.error;phot.magfloatN4magBrightness in N4 filter of AKARI/IRC (AB)magphot.mag;em.IR.4-8umfloate_N4magN4mag measurement uncertaintymagstat.error;phot.magfloatS7mag? Brightness in S7 filter of AKARI/IRC (AB)magphot.flux.density;em.IR.4-8umfloatnullablee_S7mag? S7mag measurement uncertaintymagstat.error;phot.magfloatnullableS9mag? Brightness in S9 filter of AKARI/IRC (AB)magphot.flux.density;em.IR.8-15umfloatnullablee_S9mag? S9mag measurement uncertaintymagstat.error;phot.magfloatnullableS11mag? Brightness in S11 filter of AKARI/IRC (AB)magphot.flux.density;em.IR.8-15umfloatnullablee_S11mag? S11mag measurement uncertaintymagstat.error;phot.magfloatnullableL15mag? Brightness in L15 filter of AKARI/IRC (AB)magphot.flux.density;em.IR.8-15umfloatnullablee_L15mag? L15mag measurement uncertaintymagstat.error;phot.magfloatnullableL18mag? Brightness in L18 filter of AKARI/IRC (AB)magphot.flux.density;em.IR.15-30umfloatnullablee_L18mag? L18mag measurement uncertaintymagstat.error;phot.magfloatnullableL24mag? Brightness in L24 filter of AKARI/IRC (AB)magphot.flux.density;em.IR.15-30umfloatnullablee_L24mag? L24mag measurement uncertaintymagstat.error;phot.magfloatnullablesumy[11/21] Sum of predictions from the voting scheme (see paper for more information)meta.numberintypred[0/1] Final classifier prediction (2)meta.codeint