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An unfolding method for X-ray spectro-polarimetry.

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Title: An unfolding method for X-ray spectro-polarimetry.
Authors: Kislat, F.1 fkislat@physics.wustl.edu, Beilicke, M.1, Guo, Q.1, Zajczyk, A.1, Krawczynski, H.1
Source: Astroparticle Physics. Apr2015, Vol. 64, p40-48. 9p.
Subjects: Polarimetry, Photons, Potential theory (Physics), Energy levels (Quantum mechanics), Iterative methods (Mathematics), Spectrum analysis
Abstract: X-ray polarimetry has great scientific potential and new experiments, such as X-Calibur, PoGOLite, XIPE, and GEMS, will not only be orders of magnitude more sensitive than previous missions, but also provide the capability to measure polarization over a wide energy range. However, the measured spectra depend on the collection area, detector responses, and, in case of balloon-borne experiments, the absorption of X-rays in the atmosphere, all of which are energy dependent. Combined with the typically steep source spectra, this leads to significant biases that need to be taken into account to correctly reconstruct energy-resolved polarization properties. In this paper, we present a method based on an iterative unfolding algorithm that makes it possible to simultaneously reconstruct the energy spectrum and the polarization properties as a function of true photon energy. We apply the method to a simulated X-Calibur data set and show that it is able to recover both the energy spectrum and the energy-dependent polarization fraction. [ABSTRACT FROM AUTHOR]
Copyright of Astroparticle Physics is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 100234105
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: An unfolding method for X-ray spectro-polarimetry.
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  Data: <searchLink fieldCode="AR" term="%22Kislat%2C+F%2E%22">Kislat, F.</searchLink><relatesTo>1</relatesTo><i> fkislat@physics.wustl.edu</i><br /><searchLink fieldCode="AR" term="%22Beilicke%2C+M%2E%22">Beilicke, M.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Guo%2C+Q%2E%22">Guo, Q.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Zajczyk%2C+A%2E%22">Zajczyk, A.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Krawczynski%2C+H%2E%22">Krawczynski, H.</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Astroparticle+Physics%22">Astroparticle Physics</searchLink>. Apr2015, Vol. 64, p40-48. 9p.
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  Data: <searchLink fieldCode="DE" term="%22Polarimetry%22">Polarimetry</searchLink><br /><searchLink fieldCode="DE" term="%22Photons%22">Photons</searchLink><br /><searchLink fieldCode="DE" term="%22Potential+theory+%28Physics%29%22">Potential theory (Physics)</searchLink><br /><searchLink fieldCode="DE" term="%22Energy+levels+%28Quantum+mechanics%29%22">Energy levels (Quantum mechanics)</searchLink><br /><searchLink fieldCode="DE" term="%22Iterative+methods+%28Mathematics%29%22">Iterative methods (Mathematics)</searchLink><br /><searchLink fieldCode="DE" term="%22Spectrum+analysis%22">Spectrum analysis</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: X-ray polarimetry has great scientific potential and new experiments, such as X-Calibur, PoGOLite, XIPE, and GEMS, will not only be orders of magnitude more sensitive than previous missions, but also provide the capability to measure polarization over a wide energy range. However, the measured spectra depend on the collection area, detector responses, and, in case of balloon-borne experiments, the absorption of X-rays in the atmosphere, all of which are energy dependent. Combined with the typically steep source spectra, this leads to significant biases that need to be taken into account to correctly reconstruct energy-resolved polarization properties. In this paper, we present a method based on an iterative unfolding algorithm that makes it possible to simultaneously reconstruct the energy spectrum and the polarization properties as a function of true photon energy. We apply the method to a simulated X-Calibur data set and show that it is able to recover both the energy spectrum and the energy-dependent polarization fraction. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Astroparticle Physics is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.astropartphys.2014.11.003
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      – Code: eng
        Text: English
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        PageCount: 9
        StartPage: 40
    Subjects:
      – SubjectFull: Polarimetry
        Type: general
      – SubjectFull: Photons
        Type: general
      – SubjectFull: Potential theory (Physics)
        Type: general
      – SubjectFull: Energy levels (Quantum mechanics)
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      – SubjectFull: Iterative methods (Mathematics)
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      – SubjectFull: Spectrum analysis
        Type: general
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      – TitleFull: An unfolding method for X-ray spectro-polarimetry.
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              Text: Apr2015
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              Y: 2015
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              Value: 64
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