J/MNRAS/504/565ivo://CDS.VizieR/J/MNRAS/504/565doi:10.26093/cds/vizier.75040565CDSJones O.C.Nally C.Sharp M.J.McDonald I.Boyer M.L.Meixner M.,Kemper F.Ferguson A.M.N.Goldman S.R.Rich R.M.2024-08-21T20:17:51Z2022-03-16T08:00:48ZCDS support team

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

cds-question@unistra.frgalaxiesvariable-starsinfrared-photometryVariable stars in the compact elliptical galaxy M32 are identified, using three epochs of photometry from the Spitzer Space Telescope at 3.6 and 4.5{mu}m, separated by 32 to 381d. We present a high-fidelity catalogue of sources detected in multiple epochs at both 3.6 and 4.5{mu}m, which we analysed for stellar variability using a joint probability error-weighted flux difference. Of these, 83 stars are identified as candidate large-amplitude, long-period variables, with 28 considered high-confidence variables. The majority of the variable stars are classified as asymptotic giant branch star candidates using colour-magnitude diagrams. We find no evidence supporting a younger, infrared-bright stellar population in our M32 field.2021MNRAS.504..565Jhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/504/565CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/539/A138 : RR Lyr variable stars in M32 (Fiorentino+, 2012)J/MNRAS/446/1584 : IRAC point sources for M32 (Jones+, 2015)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/504/565https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/504/565http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/504/565https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/504/565https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/504/565http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/504/565GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/504/565/table2 (Catalogue of point sources for M32)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/504/565/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/504/565/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/504/565/table2?GETtext/xml+votable180.050000true10.605740.862540.0055555555555555566/2622-2623https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/504/565?format=asciiInfrareddefaultJ/MNRAS/504/565/table2Catalogue of point sources for M32recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[1/1387] Point-source IDmeta.id;meta.mainintRAJ2000Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.main[3.6]-1[0/18.6]? Epoch 1 magnitude in [3.6]magphot.mag;em.IR.3-4umfloatnullablee_[3.6]-1[0/0.2]? Error epoch 1 magnitude in [3.6]magstat.errorfloatnullable[3.6]-2[0/18.3]? Epoch 2 magnitude in [3.6]magphot.mag;em.IR.3-4umfloatnullablee_[3.6]-2[0/0.2]? Error epoch 2 magnitude in [3.6]magstat.errorfloatnullable[3.6]-3[0/18.5]? Epoch 3 magnitude in [3.6]magphot.mag;em.IR.3-4umfloatnullablee_[3.6]-3[0/0.2]? Error epoch 3 magnitude in [3.6]magstat.errorfloatnullable[4.5]-1[0/18.8]? Epoch 1 magnitude in [4.5]magphot.mag;em.IR.4-8umfloatnullablee_[4.5]-1[0/0.3]? Error epoch 1 magnitude in [4.5]magstat.errorfloatnullable[4.5]-2[0/18.9]? Epoch 2 magnitude in [4.5]magphot.mag;em.IR.4-8umfloatnullablee_[4.5]-2[0/0.3]? Error epoch 2 magnitude in [4.5]magstat.errorfloatnullable[4.5]-3[0/19.1]? Epoch 3 magnitude in [4.5]magphot.mag;em.IR.4-8umfloatnullablee_[4.5]-3[0/0.3]? Error epoch 3 magnitude in [4.5]magstat.errorfloatnullableV[3.6]-12[0/16.1]? Variability index at [3.6] for interval 12meta.code;src.var.indexfloatnullableV[3.6]-13[0/17.3]? Variability index at [3.6] for interval 13meta.code;src.var.indexfloatnullableV[3.6]-23[0/13.2]? Variability index at [3.6] for interval 23meta.code;src.var.indexfloatnullableV[4.5]-12[0/7.7]? Variability index at [4.5] for interval 12meta.code;src.var.indexfloatnullableV[4.5]-13[0/9.6]? Variability index at [4.5] for interval 13meta.code;src.var.indexfloatnullableV[4.5]-23[0/10.2]? Variability index at [4.5] for interval 23meta.code;src.var.indexfloatnullable[3.6]mean[14.8/18.3] Mean [3.6] magnitudemagphot.mag;em.IR.3-4um;stat.meanfloat[4.5]mean[14.3/18.9] Mean [4.5] magnitudemagphot.mag;em.IR.4-8um;stat.meanfloatAmp[3.6][0.0/1.8] Observed [3.6] Amplitudemagphot.magfloatAmp[4.5][0.0/1.5] Observed [4.5] Amplitudemagphot.magfloatVar[0.0/2.0] Variable star classificationmeta.code;src.varint