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Titolo: Solar EUV spectroscopic observations with SOHO/CDS - I. An in-flight calibration study
Autore: Del Zanna, G; Bromage, BJI; Landi, E; Landini, M;
- Indirizzi:
- Univ Cent Lancashire, Ctr Astrophys, Preston PR1 2HE, Lancs, England Univ Cent Lancashire Preston Lancs England PR1 2HE R1 2HE, Lancs, England USN, Res Lab, Washington, DC 20375 USA USN Washington DC USA 20375USN, Res Lab, Washington, DC 20375 USA Univ Florence, Dipartimento Astron & Sci Spazio, I-50125 Florence, Italy Univ Florence Florence Italy I-50125 Sci Spazio, I-50125 Florence, Italy
- Titolo Testata:
- ASTRONOMY & ASTROPHYSICS
fascicolo: 2,
volume: 379,
anno: 2001,
pagine: 708 - 734
- SICI:
- 1432-0746(200111)379:2<708:SESOWS>2.0.ZU;2-T
- Fonte:
- ISI
- Lingua:
- ENG
- Soggetto:
- CORONAL DIAGNOSTIC SPECTROMETER; ELECTRON-IMPACT-EXCITATION; BE-LIKE IONS; EXTREME-ULTRAVIOLET; QUIET-SUN; ATOMIC DATABASE; EMISSION-LINES; CDS-NIS; INTENSITY CALIBRATION; COLLISION STRENGTHS;
- Keywords:
- Sun : corona; techniques : spectroscopic;
- Tipo documento:
- Article
- Natura:
- Periodico
- Settore Disciplinare:
- Physical, Chemical & Earth Sciences
- Citazioni:
- 54
- Recensione:
- Indirizzi per estratti:
- Indirizzo: Del Zanna, G Univ Cambridge, Dept Appl Math & Theoret Phys, Silver St, Cambridge CB3 9EW, England Univ Cambridge Silver St Cambridge England CB3 9EW, England
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- Citazione:
- G. Del Zanna et al., "Solar EUV spectroscopic observations with SOHO/CDS - I. An in-flight calibration study", ASTRON ASTR, 379(2), 2001, pp. 708-734
Abstract
An in-flight calibration study of the Coronal Diagnostic Spectrometer (CDS) instrument on board SOHO (Solar and Heliospheric Observatory) is presented. The relative intensity calibration of CDS is a fundamental requirement for deriving important physical parameters of the solar transition region and corona from the observations. This comprehensive study provides the firstcomplete in-flight relative calibration of all nine CDS channels, first and second order. This has been achieved with the use of a spectroscopic calibration method, mainly based on the comparison between observed line ratiosand theoretical predictions provided by the CHIANTI atomic database. The calibration method has been applied to a large number of observations (on-disc, off-limb, quiet sun, active region), to enable the use of a wide range of spectral lines from low to high temperatures of formation. The results are compared to the pre-launch calibration and other post-launch studies. Significant differences with the ground calibration results are found, while there is good agreement with the post-launch studies, based on rocket flights. It is also shown that the relative calibration has not significantly changed over a long period of time, thus confirming the excellent stability of the CDS instrument.
ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 18/06/13 alle ore 23:32:03