J/ApJS/263/1ivo://CDS.VizieR/J/ApJS/263/1doi:10.26093/cds/vizier.22630001CDSRubin D.Aldering G.Antilogus P.Aragon C.Bailey S.Baltay C.,Bongard S.Boone K.Buton C.Copin Y.Dixon S.Fouchez D.Gangler E.,Gupta R.Hayden B.Hillebrandt W.Kim A.G.Kowalski M.Kusters D.,Leget P.-F.Mondon F.Nordin J.Pain R.Pecontal E.Pereira R.,Perlmutter S.Ponder K.A.Rabinowitz D.Rigault M.Runge K.,Saunders C.Smadja G.Suzuki N.Tao C.Taubenberger S.Thomas R.C.,Vincenzi M.The Nearby Supernova Factory2023-10-03T13:01:44Z2022-12-21T12:12:49ZCDS support team

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

cds-question@unistra.frstandard-starsvisible-astronomyspectroscopystellar-spectral-typesastronomical-modelsWe calibrate spectrophotometric optical spectra of 32 stars commonly used as standard stars, referenced to 14 stars already on the Hubble Space Telescope-based CALSPEC flux system. Observations of CALSPEC and non-CALSPEC stars were obtained with the SuperNova Integral Field Spectrograph over the wavelength range 3300-9400{AA} as calibration for the Nearby Supernova Factory cosmology experiment. In total, this analysis used 4289 standard-star spectra taken on photometric nights. As a modern cosmology analysis, all presubmission methodological decisions were made with the flux scale and external comparison results blinded. The large number of spectra per star allows us to treat the wavelength-by-wavelength calibration for all nights simultaneously with a Bayesian hierarchical model, thereby enabling a consistent treatment of the Type Ia supernova cosmology analysis and the calibration on which it critically relies. We determine the typical per-observation repeatability (median 14mmag for exposures >=5s), the Maunakea atmospheric transmission distribution (median dispersion of 7mmag with uncertainty 1mmag), and the scatter internal to our CALSPEC reference stars (median of 8mmag). We also check our standards against literature filter photometry, finding generally good agreement over the full 12mag range. Overall, the mean of our system is calibrated to the mean of CALSPEC at the level of ~3mmag. With our large number of observations, careful cross-checks, and 14 reference stars, our results are the best calibration yet achieved with an integral-field spectrograph, and among the best calibrated surveys.2022ApJS..263....1Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/263/1CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/179 : Southern Spectrophotometric Standards. I + II (Hamuy+ 1992,94)I/345 : Gaia DR2 (Gaia Collaboration, 2018)J/A+AS/105/503 : Binary star speckle measurements (Balega+ 1994)J/A+AS/125/497 : Theta Vir and 109 Vir uvby photometry (Adelman 1997)J/AJ/124/1144 : Orbits of 171 single-lined sp. binaries (Latham, 2002)J/AJ/133/768 : KPNO's UBVRI transmission characteristics (Landolt+, 2007)J/other/AstBu/63.278 : Metal-poor stars speckle interferom. (Rastegaev+, 2008)J/AJ/137/4186 : UBVRI standards around celestial equator (Landolt, 2009)J/MNRAS/403/1949 : UBV(RcIc)JHK photometry of HIP nearby stars (Koen+, 2010)J/PASP/124/140 : UBVRI Hp BT and VT photonic responses (Bessell+, 2012)J/MNRAS/426/1767 : Gaia spectrophotometric standard stars I. (Pancino+, 2012)J/ApJ/750/99 : The Pan-STARRS1 photometric system (Tonry+, 2012)J/A+A/552/A124 : SNLS and SDSS SN surveys phot. calibration (Betoule+, 2013)J/A+A/549/A8 : Atmospheric extinction above Mauna Kea (Buton+, 2013)J/MNRAS/462/3616 : Gaia SPSS variability monitoring (Marinoni+, 2016)J/AJ/157/229 : CALSPEC: WFC3 IR grism spectrophotometry (Bohlin+, 2019)J/A+A/649/A3 : Gaia EDR3 photometric passbands (Riello+, 2021)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/263/1https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/263/1http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/263/1https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/263/1https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/263/1http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/263/1GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/263/1/table1 (Spectrophotometric standard stars used or considered in this analysis)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/263/1/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/263/1/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/263/1/table1?GETtext/xml+votable180.050000true332.8807291718.092822220.0055555555555555566/161 1890 4376 5506 5550 8068 9322 9733 9944 10386 10471 12068 12621 12765 13480 15291 17039 17094 17395 18712 19097 19309 20680 21879 22211 23375 23468 23789 24472 25487 25789 25950 27844 27963 28026 28134 28538 29855 30106 34502 34684 35570 35702 38682 40567 43513 44125 47100 49049https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/263/1?format=asciiOpticaldefaultJ/ApJS/263/1/table1Spectrophotometric standard stars used or considered in this analysisSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameOur namemeta.id;meta.maincharf_NameFlag(s) on Name (1)meta.codecharANameAlternative namemeta.idcharf_ANameFlag on Aname (1)meta.codecharRefReference (2)meta.ref;pos.framecharSetSample (3)src.samplecharRAJ2000Hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of declination (J2000)pos.eq.dec;meta.mainVmag[3.4/14.7] V magnitudemagphot.mag;em.opt.VfloatSpTMK spectral typesrc.spTypecharNn[1/228] Number of photometric nights on which the star was observedmeta.numberintExp[1/601] Median exposure timestime.duration;stat.medianintFileName of the TSV file in "sp" subdirectorymeta.id;meta.filecharSpInteractive spectrum plotmeta.ref.urlcharJ/ApJS/263/1/table3Atmospheric extinction in magnitudes from our radiative-transfer model (convolved to SNIFS resolution), evaluated at three different airmass valuesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambda[6000/11000] Wavelength, Angstroms0.1nmem.wlfloatEXT-X1.0[0/0.92] Median extinction for Airmass=1.0magphys.absorption;stat.median;meta.modelledfloatRMS-X1.0[0/0.13] RMS for Airmass=1.0magstat.stdevfloatEXT-X1.5[0/1.2] Median extinction for Airmass=1.5magphys.absorption;stat.median;meta.modelledfloatRMS-X1.5[0/0.17] RMS for Airmass=1.5magstat.stdevfloatEXT-X2.0[0/1.43] Median extinction for Airmass=2.0magphys.absorption;stat.median;meta.modelledfloatRMS-X2.0[0/0.2] RMS for Airmass=2.0magstat.stdevfloatJ/ApJS/263/1/table4Atmospheric extinction, measured vs modeledrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambda[3298.68/9701.23] Wavelength, Angstroms0.1nmem.wlfloatEXT-MES-Med[-0.019/0.57] Median measured extinctionmagphys.absorption;stat.medianfloatEXT-MES-RMS[0.005/0.041] RMS in measured extinctionmagstat.errorfloatEXT-MES-Unc[0.0012/0.0041] Uncertainty on mean, measuredmagstat.errorfloatEXT-MOD-Med[0.013/0.6] Median modeled extinction (1)magphys.absorption;stat.median;meta.modelledfloatEXT-MOD-RMS[0.0038/0.024] RMS in modeled extinction (1)magstat.errorfloatEXT-MOD-Unc[-0.0009/0.0013] Uncertainty on mean, modeled (1)magstat.errorfloat