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Proceedings Paper

The optical blocking filter for the ATHENA wide field imager: ongoing activities towards the conceptual design
Author(s): M. Barbera; G. Branduardi-Raymont; A. Collura; A. Comastri; J. Eder; T. Kamisiński; U. Lo Cicero; N. Meidinger; T. Mineo; S. Molendi; G. Parodi; A. Pilch; L. Piro; M. Rataj; G. Rauw; L. Sciortino; S. Sciortino; P. Wawer
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Paper Abstract

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.

Paper Details

Date Published: 24 August 2015
PDF: 13 pages
Proc. SPIE 9601, UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XIX, 960109 (24 August 2015); doi: 10.1117/12.2189326
Show Author Affiliations
M. Barbera, Univ. degli Studi di Palermo (Italy)
INAF - Osservatorio Astronomico di Palermo Giuseppe S. Vaiana (Italy)
G. Branduardi-Raymont, Univ. College London (United Kingdom)
A. Collura, INAF - Osservatorio Astronomico di Palermo Giuseppe S. Vaiana (Italy)
A. Comastri, INAF - Osservatorio Astronomico di Bologna (Italy)
J. Eder, Max-Planck-Institut für extraterrestrische Physik (Germany)
T. Kamisiński, AGH Univ. of Science and Technology (Poland)
U. Lo Cicero, INAF - Osservatorio Astronomico di Palermo Giuseppe S. Vaiana (Italy)
Univ. degli Studi di Palermo (Italy)
N. Meidinger, Max-Planck-Institut für extraterrestrische Physik (Germany)
T. Mineo, INAF - Istituto di Astrofisica Spaziale e Fisica Cosmica di Palermo (Italy)
S. Molendi, INAF - IASF Milano (Italy)
G. Parodi, BCV Progetti S.r.l. (Italy)
A. Pilch, AGH Univ. of Science and Technology (Poland)
L. Piro, INAF - Istituto di Astrofisica e Planetologia Spaziali (Italy)
M. Rataj, Space Research Ctr. (Poland)
G. Rauw, Univ. de Liège (Belgium)
L. Sciortino, Univ. degli studi di Palermo (Italy)
INAF - Osservatorio Astronomico di Palermo Giuseppe S. Vaiana (Italy)
S. Sciortino, INAF - Istituto di Astrofisica Spaziale e Fisica Cosmica di Palermo (Italy)
P. Wawer, INAF - Istituto di Astrofisica e Planetologia Spaziali (Poland)


Published in SPIE Proceedings Vol. 9601:
UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XIX
Oswald H. Siegmund, Editor(s)

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