J/AJ/161/177ivo://CDS.VizieR/J/AJ/161/177doi:10.26093/cds/vizier.51610177CDSKrick J.E.Lowrance P.Carey S.Laine S.Grillmair C.Van Dyk S.D.,Glaccum W.J.Ingalls J.G.Rieke G.Hora J.L.Fazio G.G.Gordon K.D.,Bohlin R.C.2022-01-19T09:16:02Z2021-08-16T07:27:32ZCDS support team

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

cds-question@unistra.frstandard-starsinfrared-photometrystellar-spectral-typesWe present infrared photometry of all 36 potential JWST calibrators for which there is archival Spitzer IRAC data. This photometry can then be used to inform the stellar models necessary to provide absolute calibration for all JWST instruments. We describe in detail the steps necessary to measure IRAC photometry from archive retrieval to photometric corrections. To validate our photometry, we examine the distribution of uncertainties from all detections in all four IRAC channels as well as compare the photometry and its uncertainties to those from models, ALLWISE, and the literature. Seventy-five percent of our detections have standard deviations per star of all observations within each channel of less than 3%. The median standard deviations are 1.2%, 1.3%, 1.1%, and 1.9% in 3.6-8.0, respectively. We find less than 8% standard deviations in differences of our photometry with ALLWISE and excellent agreement with literature values (less than 3% difference), lending credence to our measured fluxes. JWST is poised to do groundbreaking science, and accurate calibration and cross-calibration with other missions will be part of the underpinnings of that science.2021AJ....161..177Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/161/177CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/132/1445 : Standard calibration stars infrared spectra (Engelke+, 2006)J/ApJ/790/53 : Photometric data of HD 209458b (Zellem+, 2014)J/AJ/150/204 : Spectroscopy of standard stars (Joner+, 2015)http://jwst-docs.stsci.edu/ : JWST User Documentation homepagehttp://irsa.ipac.caltech.edu/ : NASA/IPAC Infrared science archive homepagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/161/177https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/161/177http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/161/177https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/161/177https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/161/177http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/161/177GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/161/177/table1 (*JWST calibrators observed with Spitzer IRAC)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/161/177/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/161/177/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/161/177/table1?GETtext/xml+votable180.050000true7.8270417-43.60638890.0055555555555555566/1890 7631 9322 9492 10194 10197 10202 11017 11416 11607 11732 12255 13557 15174 15291 15338 15353 16016 16058 19097 20613 20621 20716 21233 22504 23789 24472 27750 28026 30878 33722 35473 35935 37546 38262 483942.483060040379131e-20 5.517906024225661e-20https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/161/177?format=asciiInfrareddefaultJ/AJ/161/177/table1*JWST calibrators observed with Spitzer IRACSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameCalibrator star namemeta.id;meta.maincharprimaryRAJ2000[0/22] Hour of Right Ascension from SIMBAD (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination from SIMBAD (J2000)pos.eq.dec;meta.mainSpTSpectral Typesrc.spTypecharVmag[4.29/16.7] V-band magnitudemagphot.mag;em.opt.VfloatKmag[4.19/15.5] K-band magnitudemagphot.mag;em.IR.KfloatAV[0/0.26]? Extinction, V-bandmagphys.absorptionfloatnullableONameOther or Alternative namesmeta.idcharfluxesMeasured IRAC fluxes (table3)meta.ref.urlcharJ/AJ/161/177/table3Measured IRAC fluxes for JWST calibratorsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameCalibrator star namemeta.id;meta.maincharF3.6[0.14/7387]? mean 3.6um fluxmJyphot.mag;em.IR.3-4umfloatnullablee_F3.6[0.5/5.3]? Standard deviation for F3.6%stat.errorfloatnullableNF3.6[4/7082]? Number of F3.6um measurementsmeta.numberintnullableF4.5[0.11/3659]? mean 4.5um fluxmJyphot.mag;em.IR.4-8umfloatnullablee_F4.5[0.7/7.6]? Standard deviation for F4.5%stat.errorfloatnullableNF4.5[5/7516]? Number of F4.5um measurementsmeta.numberintnullableF5.8[0.8/970]? mean 5.8um fluxmJyphot.flux.density;em.IR.4-8umfloatnullablee_F5.8[0.3/8.8]? Standard deviation for F5.8%stat.errorfloatnullableNF5.8[5/725]? Number of F5.8um measurementsmeta.numberintnullableF8.0[0.45/627]? mean 8.0um fluxmJyphot.flux.density;em.IR.8-15umfloatnullablee_F8.0[0.4/14]? Standard deviation for F8.0%stat.errorfloatnullableNF8.0[4/738]? Number of F8.0um measurementsmeta.numberintnullableJ/AJ/161/177/InstrespCombined table from original tablesChannelIRAC channelmeta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintWaveWavelength in micronsumem.wldoubleResponseInstrument response in electrons/photon (1)instr.paramdouble