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

被引：15

作者：

Chauvin, M. ^{[1
,2
]}

Friis, M. ^{[1
,2
]}

Jackson, M. ^{[1
,4
]}

Kawano, T. ^{[3
]}

Kiss, M. ^{[1
,2
]}

Mikhalev, V. ^{[1
,2
]}

Ohashi, N. ^{[3
]}

Stana, T. ^{[1
]}

Takahashi, H. ^{[3
]}

Pearce, M. ^{[1
,2
]}

机构：

[1] KTH Royal Inst Technol, Dept Phys, S-10691 Stockholm, Sweden

[2] AlbaNova Univ Ctr, Oskar Klein Ctr Cosmoparticle Phys, S-10691 Stockholm, Sweden

[3] Hiroshima Univ, Dept Phys Sci, Hiroshima 7398526, Japan

[4] Cardiff Univ, Phys & Astron, Cardiff CF24 3AA, Wales

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2017年 / 859卷

基金：

瑞典研究理事会;

关键词：

X-ray; Polarisation; Compton scattering; Scientific ballooning; Crab; Cygnus X-1; Monte Carlo simulations; CYGNUS X-1; POLARIZATION MEASUREMENTS; CRAB-NEBULA; EMISSION; PATHFINDER; ASTRONOMY; DETECTOR;

D O I：

10.1016/j.nima.2017.03.027

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

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.

引用

页码：125 / 133

页数：9

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