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Preflight performance studies of the PoGOLite hard X-ray polarimeter
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics. Oskar Klein Centre for Cosmoparticle Physics, Sweden.ORCID iD: 0000-0003-1999-2161
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics. Oskar Klein Centre for Cosmoparticle Physics, Sweden.ORCID iD: 0000-0001-5191-9306
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2016 (English)In: Astroparticle physics, ISSN 0927-6505, E-ISSN 1873-2852, Vol. 72, 1-10 p.Article in journal (Refereed) Published
Abstract [en]

Polarimetric studies of astrophysical sources can make important contributions to resolve the geometry of the emitting region and determine the photon emission mechanism. PoGOLite is a balloon-borne polarimeter operating in the hard X-ray band (25-240 key), with a Pathfinder mission focussing on Crab observations. Within the polarimeter, the distribution of Compton scattering angles is used to determine the polarisation fraction and angle of incident photons. To assure an unbiased measurement of the polarisation during a balloon flight it is crucial to characterise the performance of the instrument before the launch. This paper presents the results of the PoGOLite calibration tests and simulations performed before the 2013 balloon flight. The tests performed confirm that the polarimeter does not have any intrinsic asymmetries and therefore does not induce bias into the measurements. Generally, good agreement is found between results from test data and simulations which allows the polarimeter performance to be estimated for Crab observations.

Place, publisher, year, edition, pages
2016. Vol. 72, 1-10 p.
Keyword [en]
Polarimeter, X-ray, Crab, Balloon
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-175895DOI: 10.1016/j.astropartphys.2015.05.003ISI: 000362143000001Scopus ID: 2-s2.0-84933575687OAI: oai:DiVA.org:kth-175895DiVA: diva2:871381
Funder
Swedish National Space BoardSwedish Research CouncilKnut and Alice Wallenberg Foundation
Note

QC 20151113

Available from: 2015-11-13 Created: 2015-10-26 Last updated: 2017-12-01Bibliographically approved

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Chauvin, MaximeKiss, MózsiMikhalev, VictorPearce, Mark

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