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Proceedings Paper

X-ray polarimetry on-board of HXMT
Author(s): Paolo Soffitta; Ronaldo Bellazzini; Gianpiero Tagliaferri; Enrico Costa; Giovanni Pareschi; Stefano Basso; Vincenzo Cotroneo; Massimo Frutti; Francesco Lazzarotto; Fabio Muleri; Alda Rubini; Gloria Spandre; Alessandro Brez; Luca Baldini; Jean Bregeon; Massimo Minuti; Giorgio Matt; Filippo Frontera
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Paper Abstract

The development of micropixel gas detectors, capable to image tracks produced in a gas by photoelectrons, makes possible to perform polarimetry of X-ray celestial sources in the focus of grazing incidence X-ray telescopes. HXMT is a mission by the Chinese Space Agency aimed to survey the Hard X-ray Sky with Phoswich detectors, by exploitation of the direct demodulation technique. Since a fraction of the HXMT time will be spent on dedicated pointing of particular sources, it could host, with moderate additional resources a pair of X-ray telescopes, each with a photoelectric X-ray polarimeter (EXP2, Efficient X-ray Photoelectric Polarimeter) in the focal plane. We present the design of the telescopes and the focal plane instrumentation and discuss the performance of this instrument to detect the degree and angle of linear polarization of some representative sources. Notwithstanding the limited resources, the proposed instrument can represent a breakthrough in X-ray Polarimetry.

Paper Details

Date Published: 15 July 2008
PDF: 10 pages
Proc. SPIE 7011, Space Telescopes and Instrumentation 2008: Ultraviolet to Gamma Ray, 701128 (15 July 2008); doi: 10.1117/12.789363
Show Author Affiliations
Paolo Soffitta, Istituto di Astrofisica Spaziale e Fisica Cosmica (Italy)
Ronaldo Bellazzini, Istituto Nazionale di Fisica Nucleare (Italy)
Gianpiero Tagliaferri, Osservatorio Astronomico di Merate (Italy)
Enrico Costa, Istituto di Astrofisica Spaziale e Fisica Cosmica (Italy)
Giovanni Pareschi, Osservatorio Astronomico di Merate (Italy)
Stefano Basso, Osservatorio Astronomico di Merate (Italy)
Vincenzo Cotroneo, Osservatorio Astronomico di Merate (Italy)
Massimo Frutti, Istituto di Astrofisica Spaziale e Fisica Cosmica (Italy)
Francesco Lazzarotto, Istituto di Astrofisica Spaziale e Fisica Cosmica (Italy)
Fabio Muleri, Istituto di Astrofisica Spaziale e Fisica Cosmica (Italy)
Univ. di Roma Tor Vergata (Italy)
Alda Rubini, Istituto di Astrofisica Spaziale e Fisica Cosmica (Italy)
Gloria Spandre, Istituto Nazionale di Fisica Nucleare (Italy)
Alessandro Brez, Istituto Nazionale di Fisica Nucleare (Italy)
Luca Baldini, Istituto Nazionale di Fisica Nucleare (Italy)
Jean Bregeon, Istituto Nazionale di Fisica Nucleare (Italy)
Massimo Minuti, Istituto Nazionale di Fisica Nucleare (Italy)
Giorgio Matt, Univ. degli Studi di Roma Tre (Italy)
Filippo Frontera, Univ. degli Studi di Ferrara (Italy)


Published in SPIE Proceedings Vol. 7011:
Space Telescopes and Instrumentation 2008: Ultraviolet to Gamma Ray
Martin J. L. Turner; Kathryn A. Flanagan, Editor(s)

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