J/MNRAS/426/1767ivo://CDS.VizieR/J/MNRAS/426/1767doi:10.26093/cds/vizier.74261767CDSPancino E.Altavilla G.Marinoni S.Cocozza G.Carrasco J.M.,Bellazzini M.Bragaglia A.Federici L.Rossetti E.Cacciari C.,Balaguer Nunez L.Castro A.Figueras F.Fusi Pecci F.Galleti S.,Gebran M.Jordi C.Lardo C.Masana E.Monguio M.Montegriffo P.,Ragaini S.Schuster W.Trager S.Vilardell F.Voss H.2024-07-19T20:16:24Z2013-12-16T13:47:50ZCDS support team

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

cds-question@unistra.frsurveysstandard-starsapparent-magnitudeWe describe two ground-based observing campaigns aimed at building a grid of approximately 200 spectrophotometric standard stars (SPSS), with an internal =~1% precision and tied to Vega within =~3%, for the absolute flux calibration of data gathered by Gaia, the European Space Agency (ESA) astrometric mission. The criteria for the selection and a list of candidates are presented, together with a description of the survey strategy and the adopted data analysis methods. We also discuss a short list of notable rejected SPSS candidates and difficult cases, based on identification problems, literature discordant data, visual companions and variability. In fact, all candidates are also monitored for constancy (within +/-5mmag, approximately). In particular, we report on a CALSPEC standard, 1740346, that we found to be a {delta} Scuti variable during our short-term monitoring (1-2h) campaign.2012MNRAS.426.1767Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/426/1767CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/462/3616 : SPSS III. (Marinoni+, 2016)J/MNRAS/462/3616 : SPSS V. (Pancino+, 2021)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/426/1767https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/426/1767http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/426/1767https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/426/1767https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/426/1767http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/426/1767GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/426/1767/table2 (Primary spectrophotometric standard candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/426/1767/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/426/1767/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/426/1767/table2?GETtext/xml+votable180.050000true47.62925-68.60094170.005555555555555556Cone search capability for table J/MNRAS/426/1767/table3 (Notable rejected standard candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/426/1767/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/426/1767/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/426/1767/table3?GETtext/xml+votable180.050000true62.715416759.41805560.005555555555555556Cone search capability for table J/MNRAS/426/1767/table4 (Secondary spectrophotometric standard candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/426/1767/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/426/1767/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/426/1767/table4?GETtext/xml+votable180.050000true0.544875-43.16556110.0055555555555555566/1908 2263 2536 2808 2973 3169 3258 3313 3343 3693 3781 4067 5550 5555 5827 6009 6040 6070 6118 6705 7019 7036 7043 7267 7476 7678 8093 8135 9040 9071 9154 9235 9322 9424 9458 9747 9788 9840 9944 9992 10149 10464 10471 10504 10571 10683 10928 10969 11020 11113 11176 11604-11605 11607 11612 11652 11984 12068 12541 12621 12738 12746 12791 12936 13013 13085 13133 13295 13428 13480 13628 13652 13668 13689 14289 14533 14667 14672 15353 15355 15359 15391 15462 16042-16043 16078 16089 16344 16508 17039 17094 17879 18061 18139 18195 18712 18790 19141 19306 19409 19673 19970 20423 20680 20760 20904 21479 21953 22211 22638 23101 23286 23476 23789 24204 24472 24813 25018 25792 25988 26024-26025 26175 26187 26261 26678 26808 26916 27049 27128 27380 27693 27844 27963 28018 28134 28494 28559 29855 30040 30042 30406 30528 30694 30696 30754 31227 31354 31382 31416 32051 32115 32149 32468 32783 32847 33015 33109 33792 34502 34652 34676 34975 35490 35570 35573 35576 35626 35670 35702 35721 35767 35790 37248 37546 37890 38036 38164 38324 38682 38912 39353 39612 39880 40070 40908 40944 41638 42091 42760 43130 43513 44125 45017 45110 45433 45506 45649 45782 45802 45815 45909 45921 45962 45979 46385 46612 47122 47676 47957 48728 49120https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/426/1767?format=asciiOpticaldefaultJ/MNRAS/426/1767/table2Primary spectrophotometric standard candidatesSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGroup[WOC] Group: White dwarf, hot or cool star (1)meta.idcharStarStar namemeta.id;meta.maincharf_Star[y*] Identification problems (2)meta.codecharr_StarReference for position, in refs.dat filemeta.ref;pos.framecharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainBmag? B magnitudemagphot.mag;em.opt.Bfloatnullabler_BmagReference for Bmag, in refs.dat filemeta.ref;pos.framecharVmag? V magnitudemagphot.mag;em.opt.Vfloatnullabler_VmagReference for Vmag, in refs.dat filemeta.ref;pos.framecharSpTypeMk spectral typesrc.spTypecharr_SpTypeReference for SpType, in refs.dat filemeta.ref;pos.framecharJ/MNRAS/426/1767/table3Notable rejected standard candidatesSimbadNameSimbad column added by the CDSmeta.idcharStarStar namemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintf_Star[y*] Identification problems (2)meta.codecharr_StarReference for position, in refs.dat filemeta.ref;pos.framecharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainBmag? B magnitudemagphot.mag;em.opt.Bfloatnullabler_BmagReference for Bmag, in refs.dat filemeta.ref;pos.framecharVmag? V magnitudemagphot.mag;em.opt.Vfloatnullabler_VmagReference for Vmag, in refs.dat filemeta.ref;pos.framecharSpTypeMk spectral typesrc.spTypecharr_SpTypeReference for SpType, in refs.dat filemeta.ref;pos.framecharNoteReason of rejection for table3 starsmeta.notecharJ/MNRAS/426/1767/table4Secondary spectrophotometric standard candidatesSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar namemeta.id;meta.maincharf_Star[*i] Identification problems (1)meta.codecharn_StarNote and reference for position, in notes.dat filemeta.noteintRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainBmag? B magnitudemagphot.mag;em.opt.Bfloatnullablen_Bmag? Note and reference for Bmag, in notes.dat filemeta.noteintnullableVmag? V magnitudemagphot.mag;em.opt.Vfloatnullablen_VmagNote and reference for Vmag, in notes.dat filemeta.noteintSpTypeMK spectral typesrc.spTypecharn_SpType? Note and reference for SpType, in notes.dat filemeta.noteintnullableJ/MNRAS/426/1767/notesNotesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNoteNote codemeta.noteintTextText of the notemeta.notecharJ/MNRAS/426/1767/refsReferencesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefReference codemeta.notecharBibCodeBibCodemeta.bib.bibcodecharAutAuthor's namemeta.bib.authorcharComCommentsmeta.notechar