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The Athena X-ray Integral Field Unit (X-IFU)

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arxiv 1608.08105 v1 pith:BJMJQZPN submitted 2016-08-29 astro-ph.IM astro-ph.COastro-ph.GAastro-ph.HE

The Athena X-ray Integral Field Unit (X-IFU)

Didier Barret , Thien Lam Trong , Jan-Willem den Herder , Luigi Piro , Xavier Barcons , Juhani Huovelin , Richard Kelley , J. Miguel Mas-Hesse
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Kazuhisa Mitsuda St\'ephane Paltani Gregor Rauw Agata Ro\.zanska Joern Wilms Marco Barbera Enrico Bozzo Maria Teresa Ceballos Ivan Charles Anne Decourchelle Roland den Hartog Jean-Marc Duval Fabrizio Fiore Flavio Gatti Andrea Goldwurm Brian Jackson Peter Jonker Caroline Kilbourne Claudio Macculi Mariano Mendez Silvano Molendi Piotr Orleanski Fran\c{c}ois Pajot Etienne Pointecouteau Frederick Porter Gabriel W. Pratt Damien Pr\^ele Laurent Ravera Etienne Renotte Joop Schaye Keisuke Shinozaki Luca Valenziano Jacco Vink Natalie Webb Noriko Yamasaki Fran\c{c}oise Delcelier-Douchin Michel Le Du Jean-Michel Mesnager Alice Pradines Graziella Branduardi-Raymont Mauro Dadina Alexis Finoguenov Yasushi Fukazawa Agnieszka Janiuk Jon Miller Ya\"el Naz\'e Fabrizio Nicastro Salvatore Sciortino Jose Miguel Torrejon Herv\'e Geoffray Isabelle Hernandez Laure Luno Philippe Peille J\'er\^ome Andr\'e Christophe Daniel Christophe Etcheverry Emilie Gloaguen J\'er\'emie Hassin Gilles Hervet Irwin Maussang J\'er\^ome Moueza Alexis Paillet Bruno Vella Gonzalo Campos Garrido Jean-Charles Damery Chantal Panem Johan Panh Simon Bandler Jean-Marc Biffi Kevin Boyce Antoine Cl\'enet Michael DiPirro Pierre Jamotton Simone Lotti Denis Schwander Stephen Smith Bert-Joost van Leeuwen Henk van Weers Thorsten Brand Beatriz Cobo Thomas Dauser Jelle de Plaa Edoardo Cucchetti
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classification astro-ph.IM astro-ph.COastro-ph.GAastro-ph.HE
keywords x-ifufieldathenaperformanceresolutionspectralx-raycount
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The X-ray Integral Field Unit (X-IFU) on board the Advanced Telescope for High-ENergy Astrophysics (Athena) will provide spatially resolved high-resolution X-ray spectroscopy from 0.2 to 12 keV, with 5 arc second pixels over a field of view of 5 arc minute equivalent diameter and a spectral resolution of 2.5 eV up to 7 keV. In this paper, we first review the core scientific objectives of Athena, driving the main performance parameters of the X-IFU, namely the spectral resolution, the field of view, the effective area, the count rate capabilities, the instrumental background. We also illustrate the breakthrough potential of the X-IFU for some observatory science goals. Then we briefly describe the X-IFU design as defined at the time of the mission consolidation review concluded in May 2016, and report on its predicted performance. Finally, we discuss some options to improve the instrument performance while not increasing its complexity and resource demands (e.g. count rate capability, spectral resolution). The X-IFU will be provided by an international consortium led by France, The Netherlands and Italy, with further ESA member state contributions from Belgium, Finland, Germany, Poland, Spain, Switzerland and two international partners from the United States and Japan.

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