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Calibration of the IXPE focal plane X-ray polarimeters to polarized radiation

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arxiv 2206.07582 v1 pith:ZMWNFWDD submitted 2022-06-15 astro-ph.IM

Calibration of the IXPE focal plane X-ray polarimeters to polarized radiation

Alessandro Di Marco , Sergio Fabiani , Fabio La Monaca , Fabio Muleri , John Rankin , Paolo Soffitta , Fei Xie , Fabrizio Amici
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Primo attin\`a Matteo Bachetti Luca Baldini Mattia Barbanera Wayne Baumgartner Ronaldo Bellazzini Fabio Borotto Alessandro Brez Daniele Brienza Ciro Caporale Claudia Cardelli Rita Carpentiero Simone Castellano Marco Castronuovo Luca Cavalli Elisabetta Cavazzuti Marco Ceccanti Mauro Centrone Saverio Citraro Enrico Costa Elisa D'Alba Fabio D'Amico Ettore Del Monte Sergio Di Cosimo Niccol\`o Di Lalla Giuseppe Di Persio Immacolata Donnarumma Yuri Evangelista Riccardo Ferrazzoli Luca Latronico Carlo Lefevre Pasqualino Loffredo Paolo Lorenzi Leonardo Lucchesi Carlo Magazz\`u Guido Magazz\`u Simone Maldera Alberto Manfreda Elio Mangraviti Marco Marengo Giorgio Matt Paolo Mereu Massimo Minuti Alfredo Morbidini Federico Mosti Hikmat Nasimi Barbara Negri Alessio Nuti Stephen L. O'Dell Leonardo Orsini Matteo Perri Melissa Pesce-Rollins Raffaele Piazzolla Stefano Pieraccini Maura Pilia Michele Pinchera Alessandro Profeti Simonetta Puccetti Brian D. Ramsey Ajay Ratheesh Alda Rubini Francesco Santoli Paolo Sarra Emanuele Scalise Andrea Sciortino Carmelo Sgr\`o Gloria Spandre Marcello Tardiola Allyn F. Tennant Antonino Tobia Alessio Trois Marco Vimercati Martin C. Weisskopf Davide Zanetti Francesco Zanetti
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classification astro-ph.IM
keywords detectorixpecalibrationx-raydedicatedexplorerfocalplane
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IXPE (Imaging X-ray Polarimetry Explorer) is a NASA Small Explorer mission -- in partnership with the Italian Space Agency (ASI) -- dedicated to X-ray polarimetry in the 2--8 keV energy band. The IXPE telescope comprises three grazing incidence mirror modules coupled to three detector units hosting each one a Gas Pixel Detector (GPD), a gas detector that allows measuring the polarization degree by using the photoelectric effect. A wide and accurate ground calibration was carried out on the IXPE Detector Units (DUs) at INAF-IAPS, in Italy, where a dedicated facility was set-up at this aim. In this paper, we present the results obtained from this calibration campaign to study the IXPE focal plane detector response to polarized radiation. In particular, we report on the modulation factor, which is the main parameter to estimate the sensitivity of a polarimeter.

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Cited by 4 Pith papers

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

  1. Peering through the dip: IXPE unveils the extended scattering environment of GX 13+1

    astro-ph.HE 2026-07 conditional novelty 6.0

    During the periodic dip of GX 13+1, X-ray polarization rises to 9.1%±1.1% and rotates by ~60° relative to the off-dip state, consistent with scattering in an oblate corona or disk wind.

  2. Unchanged X-Ray Polarization During Accretion Dips in the Low Hard State of Cygnus X-1

    astro-ph.HE 2026-07 conditional novelty 6.0

    During Cygnus X-1 accretion dips the 2–8 keV polarization is unchanged within errors, indicating the absorbed disk does not contribute and supporting an extended oblate corona.

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

    astro-ph.HE 2026-04 conditional novelty 3.0

    A consolidated IXPE data-analysis recipe, with new post-DU2-anomaly background-rejection thresholds fitted to one observation.

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

    astro-ph.HE 2026-04 accept novelty 2.0

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