J/ApJS/213/11ivo://CDS.VizieR/J/ApJS/213/11doi:10.26093/cds/vizier.22130011CDSWarren H.P.Ugarte-Urra I.Landi E.2017-06-30T05:47:50Z2014-09-15T15:10:35ZCDS support team

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

cds-question@unistra.frthe-sunspectroscopyultraviolet-astronomyWe investigate the absolute calibration of the EUV Imaging Spectrometer (EIS) on Hinode by comparing EIS full-disk mosaics with irradiance observations from the EUV Variability Experiment on the Solar Dynamics Observatory. We also use extended observations of the quiet corona above the limb combined with a simple differential emission measure model to establish new effective area curves that incorporate information from the most recent atomic physics calculations. We find that changes to the EIS instrument sensitivity are a complex function of both time and wavelength. We find that the sensitivity is decaying exponentially with time and that the decay constants vary with wavelength. The EIS short wavelength channel shows significantly longer decay times than the long wavelength channel.2014ApJS..213...11Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/213/11CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/ApJ/759/141 : Emission measures in solar active regions (Warren+, 2012)J/A+A/432/1063 : Analysis of inner solar corona in EUV (Lanzafame+, 2005)J/ApJ/543/1016 : Solar active region EUV spectrum from SERTS-97 (Brosius+ 2000)J/A+AS/125/149 : CHIANTI: An Atomic Database For Emission Lines I. (Dere+ 1997)J/ApJS/91/461 : EUV spectrum of solar active region (Thomas+, 1994)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/213/11https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/213/11http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/213/11https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/213/11https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/213/11http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/213/11GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapUVdefaultJ/ApJS/213/11/fig2*Spectrum of the quiet Sun above the limbrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDateDate of the observation (UT): 2007-11-04, 2010-10-16, 2012-08-09 or 2013-07-20time.epochnullablelambda[166/292] Wavelength {lambda} in Angstroms0.1nmem.wlfloatIrawUncalibrated intensity (1)count.s**-1.pixel**-1phot.flux.densitydoublee_IrawUncertainty on Idncount.s**-1.pixel**-1stat.errordoubleIprePre-flight calibrated intensity (2)cW.m**-2.sr**-1.nm**-1spect.line.intensitydoublee_IpreUncertainty on PreCint (2)cW.m**-2.sr**-1.nm**-1stat.errordoubleIcalCorrected calibrated intensity (2)cW.m**-2.sr**-1.nm**-1spect.line.intensitydoublee_IcalUncertainty on CCInt (2)cW.m**-2.sr**-1.nm**-1stat.errordouble