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The optical blocking filter for the ATHENA wide field imager: ongoing activities towards the conceptual design
Barbera, M.; Branduardi-Raymont, G.; Collura, A. et al.
2015In Siegmund, Oswald H. (Ed.) UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XIX
 

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Abstract :
[en] ATHENA is the L2 mission selected by ESA to pursue the science theme "Hot and Energetic Universe" (launch scheduled in 2028). One of the key instruments of ATHENA is the Wide Field Imager (WFI) which will provide imaging in the 0.1-15 keV band over a 40'x40' large field of view, together with spectrally and time-resolved photon counting. The WFI camera, based on arrays of DEPFET active pixel sensors, is also sensitive to UV/Vis photons. Optically generated electron-hole pairs may degrade the spectral resolution as well as change the energy scale by introducing a signal offset. For this reason, the use of an X-ray transparent optical blocking filter is needed to allow the observation of all type of X-ray sources that present a UV/Visible bright counterpart. In this paper, we describe the main activities that we are carrying on for the conceptual design of the optical blocking filter, that will be mounted on the filter wheel, in order to satisfy the scientific requirements on optical load from bright UV/Vis astrophysical source, to maximize the X-ray transmission, and to withstand the severe acoustic and vibration loads foreseen during launch.
Research center :
LiSRI - Liège Space Research Institute - ULiège
Disciplines :
Aerospace & aeronautics engineering
Space science, astronomy & astrophysics
Author, co-author :
Barbera, M.;  Univ. degli Studi di Palermo (Italy)
Branduardi-Raymont, G.;  Univ. College London (United Kingdom)
Collura, A.;  INAF - Osservatorio Astronomico di Palermo Giuseppe S. Vaiana (Italy)
Comastri, A.;  INAF - Osservatorio Astronomico di Bologna (Italy)
Eder, J.;  Max-Planck-Institut für extraterrestrische Physik (Germany)
Kamisiński, T.;  AGH Univ. of Science and Technology (Poland)
Lo Cicero, U.;  INAF - Osservatorio Astronomico di Palermo Giuseppe S. Vaiana (Italy)
Meidinger, N.;  Max-Planck-Institut für extraterrestrische Physik (Germany)
Mineo, T.;  INAF - Istituto di Astrofisica Spaziale e Fisica Cosmica di Palermo (Italy)
Molendi, S.;  INAF - IASF Milano (Italy)
Parodi, G.;  BCV Progetti S.r.l. (Italy)
Pilch, A.;  AGH Univ. of Science and Technology (Poland)
Piro, L.;  INAF - Istituto di Astrofisica e Planetologia Spaziali (Italy)
Rataj, M.;  Space Research Ctr. (Poland)
Rauw, Gregor  ;  Université de Liège - ULiège
Sciortino, L.;  Univ. degli studi di Palermo (Italy)
Sciortino, S.;  INAF - Istituto di Astrofisica Spaziale e Fisica Cosmica di Palermo (Italy)
Wawer, P.;  INAF - Istituto di Astrofisica e Planetologia Spaziali (Poland))
More authors (8 more) Less
Language :
English
Title :
The optical blocking filter for the ATHENA wide field imager: ongoing activities towards the conceptual design
Publication date :
01 August 2015
Event name :
UV, X-ray, and Gamma-Ray Space Instrumentation for Astronomy XIX
Event organizer :
Society of Photo-Optical Instrumentation Engineers (SPIE)
Event place :
San Diego, United States
Event date :
from 09-08-2015 to 10-08-2015
Audience :
International
Main work title :
UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XIX
Editor :
Siegmund, Oswald H.
Publisher :
SPIE Digital Library, Washington, United States
ISBN/EAN :
9781628417678
Collection name :
Proceedings of SPIE; 9601
Pages :
13
Commentary :
ISBN: 9601
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