JUXTA: A new probe of X-ray emission from the Jupiter system

Yuichiro Ezoe, Tomoki Kimura, Satoshi Kasahara, Atsushi Yamazaki, Kazuhisa Mitsuda, Masaki Fujimoto, Yoshizumi Miyoshi, Graziella Branduardi-Raymont, Kumi Ishikawa, Ikuyuki Mitsuishi, Tomohiro Ogawa, Takuya Kakiuchi, Takaya Ohashi

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


For the future Japanese exploration mission of the Jupiter's magnetosphere (JMO: Jupiter Magnetospheric Orbiter), a unique instrument named JUXTA (Jupiter X-ray Telescope Array) is being developed. It aims at the first in-situ measurement of X-ray emission associated with Jupiter and its neighborhood. Recent observations with Earth-orbiting satellites have revealed various X-ray emission from the Jupiter system. X-ray sources include Jupiter's aurorae, disk emission, inner radiation belts, the Galilean satellites and the Io plasma torus. X-ray imaging spectroscopy can be a new probe to reveal rotationally driven activities, particle acceleration and Jupiter-satellite binary system. JUXTA is composed of an ultra-light weight X-ray telescope based on micromachining technology and a radiation-hard semiconductor pixel detector. It covers 0.3-2 keV with the energy resolution of <100 eV at 0.6 keV. Because of proximity to Jupiter (∼30 Jovian radii at periapsis), the image resolution of <5 arcmin and the on-Axis effective area of >3 cm 2 at 0.6 keV allow extremely high photon statistics and high resolution observations.

Original languageEnglish
Pages (from-to)1605-1621
Number of pages17
JournalAdvances in Space Research
Issue number9
Publication statusPublished - 2013 May 1
Externally publishedYes


  • Instrumentation for space plasma physics
  • Ionosphere and magnetosphere
  • Jovian satellites
  • Jupiter
  • Radiation belts
  • X-ray

ASJC Scopus subject areas

  • Aerospace Engineering
  • Astronomy and Astrophysics
  • Geophysics
  • Atmospheric Science
  • Space and Planetary Science
  • Earth and Planetary Sciences(all)


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