Publications of Yaël Nazé
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See detailDes miroirs... liquides!
Nazé, Yaël ULg

Article for general public (2000)

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See detailPSF modeling of the XMM flight mirror modules
Stockman, Yvan ULg; Houbrechts, Yvette ULg; Nazé, Yaël ULg et al

in Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series (1999, October 01)

In the frame of XMM testing, all the mirror modules have been illuminated by a vertical EUV collimated beam a the Centre Spatial de Liege. A mirror module consists in 58 co- focal and co-axial Wolter I ... [more ▼]

In the frame of XMM testing, all the mirror modules have been illuminated by a vertical EUV collimated beam a the Centre Spatial de Liege. A mirror module consists in 58 co- focal and co-axial Wolter I mirrors. Up to now the images obtained at CSL have been used to assess the Mirror Module optical performances in a flight representative configuration, and also to verify the impact of the thermal environmental and vibration test on the optical performance. Due to the highly complex design of the Mirror Modules, simulating XMM images in details is very difficult. The Point Spread Function of some of the mirror modules presents slight asymmetry. In the facility design study, it has been demonstrated that the diffraction impact at 58.4 nm is negligible with respect to the half energy width mirror module specification. Presently all the mirror modules are better than 165 arcsec. This paper presents first the diffraction contribution on the image. In a second step a point spread function is built by using the metrological mirror shell data. EUV images are then analyzed to evaluate the impact of the mirror interface structure integration process on the PSF. An analytical model of the measured EUV pSF is developed. The modelization technique is applied to simulate in-orbit image. Finally the different modelizations are evaluated and compared. [less ▲]

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See detailL'ombre gothique
Nazé, Yaël ULg

Article for general public (1999)

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See detailLe programme scientifique de l'ESA (2)
Nazé, Yaël ULg

Article for general public (1999)

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See detailLe programme scientifique de l'ESA (1)
Nazé, Yaël ULg

Article for general public (1999)

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See detailPetite mythologie astronomique (3): la Lune
Nazé, Yaël ULg

Article for general public (1998)

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See detailPetite mythologie astronomique (2): le Soleil
Nazé, Yaël ULg

Article for general public (1998)

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See detailLa détermination des distances en astronomie
Nazé, Yaël ULg

Article for general public (1998)

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See detailPetite mythologie astronomique (1): le ciel
Nazé, Yaël ULg

Article for general public (1998)

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See detailEcho des nocturnes
Nazé, Yaël ULg; Lo Bue, Francesco

Article for general public (1998)

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See detailTycho: premières observations
Nazé, Yaël ULg

Article for general public (1998)

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See detailUne visite à l'ESO
Nazé, Yaël ULg

Article for general public (1998)

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See detailL'Univers est l'avenir de l'homme
Nazé, Yaël ULg

Article for general public (1997)

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