Calibration and performance studies of the balloon-borne hard X-ray polarimeter PoGO

Kawano, T. (author)

Ohashi, N. (author)

Takahashi, H. (author)

Pearce, Mark, 1970- (author): KTH,Fysik,The Oskar Klein Centre for Cosmoparticle Physics, AlbaNova University Centre, 106 91 Stockholm, Sweden

(creator_code:org_t)

ELSEVIER SCIENCE BV, 2017
2017
English.
In: Nuclear Instruments and Methods in Physics Research Section A. - : ELSEVIER SCIENCE BV. - 0168-9002 .- 1872-9576. ; 859, s. 125-133

Related links:: http://arxiv.org/pdf...; show more...; https://urn.kb.se/re...; https://doi.org/10.1...; show less...

Abstract Subject headings

Polarimetric observations of celestial sources in the hard X-ray band stand to provide new information on emission mechanisms and source geometries. PoGO+ is a Compton scattering polarimeter (20-150 keV) optimised for the observation of the Crab (pulsar and wind nebula) and Cygnus X-1 (black hole binary), from a stratospheric balloon-borne platform launched from the Esrange Space Centre in summer 2016. Prior to flight, the response of the polarimeter has been studied with polarised and unpolarised X-rays allowing a Geant4-based simulation model to be validated. The expected modulation factor for Crab observations is found to be M-Crab = (41.75 +/- 0.85)%, resulting in an expected Minimum Detectable Polarisation (MDP) of 7.3% for a 7 day flight. This will allow a measurement of the Crab polarisation parameters with at least 5 sigma statistical significance assuming a polarisation fraction similar to 20% - a significant improvement over the PoGOLite Pathfinder mission which flew in 2013 and from which the PoGO+ design is developed.

By the author/editor: Chauvin, Maxime; Friis, Mette; Jackson, Miranda; Kawano, T.; Kiss, Mózsi, 198 ...; Mikhalev, Victor; show more...; Ohashi, N.; Stana, Theodor-A ...; Takahashi, H.; Pearce, Mark, 19 ...; show less...

About the subject

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