Development of the small satellite "tsubame"

T. Toizumi, T. Enomoto, Y. Yatsu, T. Nakamori, N. Kawai, K. Ishizaka, A. Muta, H. Morishita, K. Akiyama, N. Kisa, S. Inagawa, M. Kawakubo, J. Nishida, S. Mizunuma, S. Matsunaga, J. Kataoka

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


Tsubame is a university-built small satellite mission to measure polarization of hard X-ray photons (30200 keV) from gamma-ray bursts (GRB) using azimuthal angle anisotropy of Compton-scattered photons. Polarimetry in the hard X-ray and soft gamma-ray band should play a crucial role in understanding of high energy emission mechanisms, the distribution of magnetic fields and radiation fields of gamma-ray bursts. Tsubame has two instruments: the Wide-field Bust Monitor (WBM) and the Hard X-ray Compton Polarimeter (HXCP). The WBM detects a burst and determines on board the direction of the burst occurrence with an accuracy of 10°. The spacecraft is then slewed to point the GRB within 15 s from the WBM trigger using the Control Moment Gyro (CMG), a high speed attitude control device. HXCP will measure the polarized X-ray photons from the GRB while the spacecraft spins slowly around the bore sight. In this paper, we present an overview of the Tsubame mission, the results of a test experiment for HXCP using a polarized hard X-ray beam, and its comparison with a Monte Carlo simulation.

Original languageEnglish
Pages (from-to)685-688
Number of pages4
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Issue number3
Publication statusPublished - 2011 Jan

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

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