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Galaxies 2018, 6(1), 30;

The PoGO+ Balloon-Borne Hard X-ray Polarimetry Mission

KTH Royal Institute of Technology, Department of Physics, 106 91 Stockholm, Sweden
The Oskar Klein Centre for Cosmoparticle Physics, AlbaNova University Center, 106 91 Stockholm, Sweden
Department of Physical Science, Hiroshima University, Hiroshima 739-8526, Japan
On behalf of the PoGO+ Collaboration.
Author to whom correspondence should be addressed.
Received: 31 January 2018 / Revised: 23 February 2018 / Accepted: 26 February 2018 / Published: 2 March 2018
(This article belongs to the Special Issue The Bright Future of Astronomical X-ray Polarimetry)
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The PoGO mission, including the PoGOLite Pathfinder and PoGO+, aims to provide polarimetric measurements of the Crab system and Cygnus X-1 in the hard X-ray band. Measurements are conducted from a stabilized balloon-borne platform, launched on a 1 million cubic meter balloon from the Esrange Space Center in Sweden to an altitude of approximately 40 km. Several flights have been conducted, resulting in two independent measurements of the Crab polarization and one of Cygnus X-1. Here, a review of the PoGO mission is presented, including a description of the payload and the flight campaigns, and a discussion of some of the scientific results obtained to date. View Full-Text
Keywords: Compton polarimeter; hard X-rays; Crab, Cygnus X-1; scientific ballooning; payload design, attitude control Compton polarimeter; hard X-rays; Crab, Cygnus X-1; scientific ballooning; payload design, attitude control

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Friis, M.; Kiss, M.; Mikhalev, V.; Pearce, M.; Takahashi, H. The PoGO+ Balloon-Borne Hard X-ray Polarimetry Mission. Galaxies 2018, 6, 30.

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