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An algorithm to calibrate and correct the response to unpolarized radiation of the X-ray polarimeter on board IXPE

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arxiv 2111.14867 v1 pith:LSNKBLJH submitted 2021-11-29 astro-ph.IM astro-ph.HE

classification astro-ph.IMastro-ph.HE
keywords ixperesponsepolarizationsourcesalgorithmcorrectcorrectioncorrectly
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The Gas Pixel Detector is an X-ray polarimeter to fly on-board IXPE and other missions. To correctly measure the source polarization, the response of IXPE's GPDs to unpolarized radiation has to be calibrated and corrected. In this paper we describe the way such response is measured with laboratory sources and the algorithm to apply such correction to the observations of celestial sources. The latter allows to correct the response to polarization of single photons, therefore allowing great flexibility in all the subsequent analysis. Our correction approach is tested against both monochromatic and non-monochromatic laboratory sources and with simulations, finding that it correctly retrieves the polarization up to the statistical limits of the planned IXPE observations.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. The hitchhiker's guide to the IXPE data analysis

    astro-ph.HE 2026-04 conditional novelty 3.0 of 10

    A user-oriented guide that collects best practices, data formats, and analysis strategies for extracting polarimetric information from IXPE observations.

  2. Imaging X-ray Polarimetry Explorer

    astro-ph.IM 2026-07 unverdicted

    IXPE, launched in December 2021, is the first dedicated imaging X-ray polarimetry observatory and has measured X-ray polarization for about 110 cosmic sources.

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