Development of the hard X-ray detector for the ASTRO-E mission

T. Takahashi*, H. Ezawa, Y. Fukazawa, M. Hirayama, E. Idesawa, H. Ikeda, Y. Ishisaki, N. Lyomoto, T. Kamae, J. Kataoka, H. Kaneda, H. Kubo, K. Makishima, K. Matsushita, K. Matsuzaki, T. Mizuno, T. Murakami, K. Nagata, S. Nakamae, M. NomachiH. Obayashi, T. Ohtsuka, H. Ozawa, Y. Saito, M. Sugizaki, T. Tamura, M. Tashiro, N. Tsuchida, K. Tsukada, A. Yoshida

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)


The Hard X-ray Detector (HXD) is one of three instruments on the fifth Japanese X-ray astronomy satellite, ASTRO-E, scheduled for launch in 2000. The HXD consists of a 4x4 = 16 modular assembly of identical counters, each consisting of a combination of YAP(or GSO)/BGO well-type phoswich counters and silicon PIN diodes. The field of view of the detector for high energy photons is restricted to 4° x 4° by active collimators made of BGO and the fov for low energy photons is restricted to 0.5° x 0.5° by the fine passive collimators made of phosphor bronze. The detector is characterized by a low background reaching severalxlO~6c/s/cm2/keV. Combined with the other two instruments for soft X-ray observations (0.5-12 keV), the ASTRO-E mission will cover the entire range of soft and hard X-rays with the highest sensitivity ever achieved. Furthermore, thick BGO counters which surround the 4x4 matrix of well-type phoswich counters act as a 7-ray burst detector in the energy band of 100-2000 keV.

Original languageEnglish
Pages (from-to)645-648
Number of pages4
JournalAstronomy and Astrophysics Supplement Series
Issue number4
Publication statusPublished - 1996 Dec 1
Externally publishedYes


  • Gamma-ray
  • Instrumentation: Detectors telescopes

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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