J/MNRAS/499/524ivo://CDS.VizieR/J/MNRAS/499/524doi:10.26093/cds/vizier.74990524CDSGiles D.K.Walkowicz L.2024-08-21T20:16:33Z2023-11-07T07:53:46ZCDS support team

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

cds-question@unistra.frsurveysvisible-astronomyIn the present era of large-scale surveys, big data present new challenges to the discovery process for anomalous data. Such data can be indicative of systematic errors, extreme (or rare) forms of known phenomena, or most interestingly, truly novel phenomena that exhibit as-of-yet unobserved behaviours. In this work, we present an outlier scoring methodology to identify and characterize the most promising unusual sources to facilitate discoveries of such anomalous data. We have developed a data mining method based on k-nearest neighbour distance in feature space to efficiently identify the most anomalous light curves. We test variations of this method including using principal components of the feature space, removing select features, the effect of the choice of k, and scoring to subset samples. We evaluate the performance of our scoring on known object classes and find that our scoring consistently scores rare (<1000) object classes higher than common classes. We have applied scoring to all long cadence light curves of Quarters 1-17 of Kepler's prime mission and present outlier scores for all 2.8 million light curves for the roughly 200k objects.2020MNRAS.499..524Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/499/524CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/133 : Kepler Input Catalog (Kepler Mission Team, 2009)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/499/524https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/499/524http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/499/524https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/499/524https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/499/524http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/499/524GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/499/524/table3 (Summary information for each object in the KIC without the column references from Simbad)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/499/524/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/499/524/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/499/524/table3?GETtext/xml+votable180.050000true291.0387336.5981290.0055555555555555564/922-923 933-935 944-946 5/3645-3647 3683 3704 3706 3729-3731 3760 3765 3788-3789 3792-3793 6/14559 14567 14573 14575 14577-14579 14730-14731 14738 14744 14746-14747 14749-14751 14792 14794-14795 14822 14828 14830-14831 14914-14915 15044-15045 15056-15057 15059 15160-15161 15164 15176-15178 15200 15202 15232-15233https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/499/524?format=asciiOpticaldefaultJ/MNRAS/499/524/table1Outlier scores min-max scaled from zero to onerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintKICKIC identifiermeta.id;meta.mainlongQ1[0/1]? Outlier score for Quarter 1 (1)meta.code.qualdoublenullableQ2[0/1]? Outlier score for Quarter 2 (1)meta.code.qualdoublenullableQ3[0/1]? Outlier score for Quarter 3 (1)meta.code.qualdoublenullableQ4[0/1]? Outlier score for Quarter 4 (1)meta.code.qualdoublenullableQ5[0/1]? Outlier score for Quarter 5 (1)meta.code.qualdoublenullableQ6[0/1]? Outlier score for Quarter 6 (1)meta.code.qualdoublenullableQ7[0/1]? Outlier score for Quarter 7 (1)meta.code.qualdoublenullableQ8[0/1]? Outlier score for Quarter 8 (1)meta.code.qualdoublenullableQ9[0/1]? Outlier score for Quarter 9 (1)meta.code.qualdoublenullableQ10[0/1]? Outlier score for Quarter 10 (1)meta.code.qualdoublenullableQ11[0/1]? Outlier score for Quarter 11 (1)meta.code.qualdoublenullableQ12[0/1]? Outlier score for Quarter 12 (1)meta.code.qualdoublenullableQ13[0/1]? Outlier score for Quarter 13 (1)meta.code.qualdoublenullableQ14[0/1]? Outlier score for Quarter 14 (1)meta.code.qualdoublenullableQ15[0/1]? Outlier score for Quarter 15 (1)meta.code.qualdoublenullableQ16[0/1]? Outlier score for Quarter 16 (1)meta.code.qualdoublenullableQ17[0/1]? Outlier score for Quarter 17 (1)meta.code.qualdoublenullableJ/MNRAS/499/524/table3Summary information for each object in the KIC without the column references from SimbadSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPositions from KIC (Cat. V/133) catalog (right ascension part)degpos.eq.ra;meta.mainnullableindexed_DEPositions from KIC (Cat. V/133) catalog (declination part)degpos.eq.dec;meta.mainnullableindexedQminQuarter of minimummeta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintKICKIC identifiermeta.id;meta.mainlongrankmedMedian rank (1)meta.code.qualdoublerankminMinimum rank (1)meta.code.qualdoubleTypeObject type from Simbad (2)src.classcharJ/MNRAS/499/524/tableb1Full machine readable table of file names for long cadence light curves from MASTrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintKICKIC identifiermeta.id;meta.mainlongFileQ1File name for long cadence light curve in quarter 1meta.id;meta.filecharFileQ2File name for long cadence light curve in quarter 2meta.id;meta.filecharFileQ3File name for long cadence light curve in quarter 3meta.id;meta.filecharFileQ4File name for long cadence light curve in quarter 4meta.id;meta.filecharFileQ5File name for long cadence light curve in quarter 5meta.id;meta.filecharFileQ6File name for long cadence light curve in quarter 6meta.id;meta.filecharFileQ7File name for long cadence light curve in quarter 7meta.id;meta.filecharFileQ8File name for long cadence light curve in quarter 8meta.id;meta.filecharFileQ9File name for long cadence light curve in quarter 9meta.id;meta.filecharFileQ10File name for long cadence light curve in quarter 10meta.id;meta.filecharFileQ11File name for long cadence light curve in quarter 11meta.id;meta.filecharFileQ12File name for long cadence light curve in quarter 12meta.id;meta.filecharFileQ13File name for long cadence light curve in quarter 13meta.id;meta.filecharFileQ14File name for long cadence light curve in quarter 14meta.id;meta.filecharFileQ15File name for long cadence light curve in quarter 15meta.id;meta.filecharFileQ16File name for long cadence light curve in quarter 16meta.id;meta.filecharFileQ17File name for long cadence light curve in quarter 17meta.id;meta.filecharJ/MNRAS/499/524/tablec1Outlier scores scaled with respect to an artificial reference sourceQ12? Outlier score scaled for Quarter 12 (1)meta.code.qualfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintKICKIC identifiermeta.id;meta.mainlongQ1? Outlier score scaled for Quarter 1 (1)meta.code.qualfloatnullableQ2? Outlier score scaled for Quarter 2 (1)meta.code.qualfloatnullableQ3? Outlier score scaled for Quarter 3 (1)meta.code.qualfloatnullableQ4? Outlier score scaled for Quarter 4 (1)meta.code.qualfloatnullableQ5? Outlier score scaled for Quarter 5 (1)meta.code.qualfloatnullableQ6? Outlier score scaled for Quarter 6 (1)meta.code.qualfloatnullableQ7? Outlier score scaled for Quarter 7 (1)meta.code.qualfloatnullableQ8? Outlier score scaled for Quarter 8 (1)meta.code.qualfloatnullableQ9? Outlier score scaled for Quarter 9 (1)meta.code.qualfloatnullableQ10? Outlier score scaled for Quarter 10 (1)meta.code.qualfloatnullableQ11? Outlier score scaled for Quarter 11 (1)meta.code.qualfloatnullableQ13? Outlier score scaled for Quarter 13 (1)meta.code.qualfloatnullableQ14? Outlier score scaled for Quarter 14 (1)meta.code.qualfloatnullableQ15? Outlier score scaled for Quarter 15 (1)meta.code.qualfloatnullableQ16? Outlier score scaled for Quarter 16 (1)meta.code.qualfloatnullableQ17? Outlier score scaled for Quarter 17 (1)meta.code.qualfloatnullable