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The NASA/ASI imaging x-ray polarimetry explorer, which will be launched in 2021, will be the first instrument to perform spatially resolved x-ray polarimetry on several astronomical sources in the 2- to 8-keV energy band. These measurements are made possible owing to the use of a gas pixel detector (GPD) at the focus of three x-ray telescopes. The GPD allows simultaneous measurements of the interaction point, energy, arrival time, and polarization angle of detected x-ray photons. The increase in sensitivity, achieved 40 years ago, for imaging and spectroscopy with the Einstein satellite will thus be extended to x-ray polarimetry for the first time. The characteristics of gas multiplication detectors are subject to changes over time. Because the GPD is a novel instrument, it is particularly important to verify its performance and stability during its mission lifetime. For this purpose, the spacecraft hosts a filter and calibration …
Publication date: 
1 Oct 2020

Riccardo Ferrazzoli, Fabio Muleri, Carlo Lefevre, Alfredo Morbidini, Fabrizio Amici, Daniele Brienza, Enrico Costa, Ettore Del Monte, Alessandro Di Marco, Giuseppe Di Persio, Immacolata Donnarumma, Sergio Fabiani, Fabio La Monaca, Pasqualino Loffredo, Luca Maiolo, Francesco Maita, Raffaele Piazzolla, Brian Ramsey, John Rankin, Ajay Ratheesh, Alda Rubini, Paolo Sarra, Paolo Soffitta, Antonino Tobia, Fei Xie

Biblio References: 
Volume: 6 Issue: 4 Pages: 048002
Journal of Astronomical Telescopes, Instruments, and Systems