Article (Scientific journals)
SOLAR-ISS: A new reference spectrum based on SOLAR/SOLSPEC observations
Meftah, M.; Damé, L.; Bolsée, D. et al.
2018In Astronomy and Astrophysics, 611
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Originally published in Astronomy and Astropysics: https://www.aanda.org/articles/aa/abs/2018/03/aa31316-17/aa31316-17.html


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Keywords :
Sun: fundamental parameters; Sun: general
Abstract :
[en] Context. Since April 5, 2008 and up to February 15, 2017, the SOLar SPECtrometer (SOLSPEC) instrument of the SOLAR payload on board the International Space Station (ISS) has performed accurate measurements of solar spectral irradiance (SSI) from the middle ultraviolet to the infrared (165 to 3088 nm). These measurements are of primary importance for a better understanding of solar physics and the impact of solar variability on climate. In particular, a new reference solar spectrum (SOLAR-ISS) is established in April 2008 during the solar minima of cycles 23-24 thanks to revised engineering corrections, improved calibrations, and advanced procedures to account for thermal and aging corrections of the SOLAR/SOLSPEC instrument. <BR /> Aims: The main objective of this article is to present a new high-resolution solar spectrum with a mean absolute uncertainty of 1.26% at 1σ from 165 to 3000 nm. This solar spectrum is based on solar observations of the SOLAR/SOLSPEC space-based instrument. <BR /> Methods: The SOLAR/SOLSPEC instrument consists of three separate double monochromators that use concave holographic gratings to cover the middle ultraviolet (UV), visible (VIS), and infrared (IR) domains. Our best ultraviolet, visible, and infrared spectra are merged into a single absolute solar spectrum covering the 165-3000 nm domain. The resulting solar spectrum has a spectral resolution varying between 0.6 and 9.5 nm in the 165-3000 nm wavelength range. We build a new solar reference spectrum (SOLAR-ISS) by constraining existing high-resolution spectra to SOLAR/SOLSPEC observed spectrum. For that purpose, we account for the difference of resolution between the two spectra using the SOLAR/SOLSPEC instrumental slit functions. <BR /> Results: Using SOLAR/SOLSPEC data, a new solar spectrum covering the 165-3000 nm wavelength range is built and is representative of the 2008 solar minimum. It has a resolution better than 0.1 nm below 1000 nm and 1 nm in the 1000-3000 nm wavelength range. The new solar spectrum (SOLAR-ISS) highlights significant differences with previous solar reference spectra and with solar spectra based on models. The integral of the SOLAR-ISS solar spectrum yields a total solar irradiance of 1372.3 ± 16.9 Wm[SUP]-2[/SUP] at 1σ, that is yet 11 Wm[SUP]-2[/SUP] over the value recommended by the International Astronomical Union in 2015. The spectrum shown in Fig. B.1 is available at the CDS via anonymous ftp to <A href="http://cdsarc.u-strasbg.fr">http://cdsarc.u-strasbg.fr</A> (<A href="http://cdsarc.u-strasbg.fr">http://130.79.128.5</A>) or via <A href="http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/611/A1">http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/611/A1</A>
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Meftah, M.;  CNRS, LATMOS, Université Paris Saclay, Université Pierre et Marie Curie, UVSQ, INSU, IPSL, 75005, Paris, France
Damé, L.;  CNRS, LATMOS, Université Paris Saclay, Université Pierre et Marie Curie, UVSQ, INSU, IPSL, 75005, Paris, France
Bolsée, D.;  Royal Belgian Institute for Space Aeronomy (BIRA-IASB), 1180, Brussels, Belgium
Hauchecorne, A.;  CNRS, LATMOS, Université Paris Saclay, Université Pierre et Marie Curie, UVSQ, INSU, IPSL, 75005, Paris, France
Pereira, N.;  Royal Belgian Institute for Space Aeronomy (BIRA-IASB), 1180, Brussels, Belgium
Sluse, Dominique  ;  BIRA-IASB > Solar Irradiance
Cessateur, G.;  Royal Belgian Institute for Space Aeronomy (BIRA-IASB), 1180, Brussels, Belgium
Irbah, A.;  CNRS, LATMOS, Université Paris Saclay, Université Pierre et Marie Curie, UVSQ, INSU, IPSL, 75005, Paris, France
Bureau, J.;  Institute of Environmental Physics, University of Bremen, 28359, Bremen, Germany
Weber, M.;  Institute of Environmental Physics, University of Bremen, 28359, Bremen, Germany
Bramstedt, K.;  Institute of Environmental Physics, University of Bremen, 28359, Bremen, Germany
Hilbig, T.;  Institute of Environmental Physics, University of Bremen, 28359, Bremen, Germany
Thiéblemont, R.;  CNRS, LATMOS, Université Paris Saclay, Université Pierre et Marie Curie, UVSQ, INSU, IPSL, 75005, Paris, France) AN(CNRS, LATMOS, Université Paris Saclay, Université Pierre et Marie Curie, UVSQ, INSU, IPSL, 75005, Paris, France
Marchand, M.;  CNRS, LATMOS, Université Paris Saclay, Université Pierre et Marie Curie, UVSQ, INSU, IPSL, 75005, Paris, France
Lefèvre, F.;  CNRS, LATMOS, Université Paris Saclay, Université Pierre et Marie Curie, UVSQ, INSU, IPSL, 75005, Paris, France
Sarkissian, A.;  CNRS, LATMOS, Université Paris Saclay, Université Pierre et Marie Curie, UVSQ, INSU, IPSL, 75005, Paris, France)
Bekki, S.
More authors (7 more) Less
Language :
English
Title :
SOLAR-ISS: A new reference spectrum based on SOLAR/SOLSPEC observations
Publication date :
01 March 2018
Journal title :
Astronomy and Astrophysics
ISSN :
0004-6361
eISSN :
1432-0746
Publisher :
EDP Sciences
Volume :
611
Peer reviewed :
Peer Reviewed verified by ORBi
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