Development micro-satellite TSUBAME for polarimetry of gamma-ray bursts

Yoichi Yatsu*, Takahiro Enomoto, Kosuke Kawakami, Kazuki Tokoyoda, Takahiro Toizumi, Nobuyuki Kawai, Kazuya Ishizaka, Saburo Matsunaga, Takeshi Nakamori, Jun Kataoka, Sin Kubo

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)


Gamma-ray bursts (GRBs) are the most drastic and intriguing phenomena in high energy astrophysics. The nature of relativistic collimated outflows that bight be generated by gravitational collapses of massive stars is to investigate the physical process just around the central engines by constraining magnetic environment. For this purpose we developed a compact and high sensitive hard x-ray polarimeter aboard a university class micro-satellite "TSUBAME." Unsurprisingly, any micro-satellites have stringent limitations on size, mass, and power consumption restricting the effective area of detectors. However, high luminosities of GRBs allow us to measure their polarizations only if we start observations just after the ignitions. TSUBAME overcomes this problem by using compact an high-torque actuators, control moment gyroscopes, that enable high speed attitude control faster than 6°s-1. Cooperating with a wide field burst monitor on board for real time position determination of GRBs, TSUBAME can start a pointing observation within ∼15 s after the detection for any GRBs in the half-sky field of view of the burst monitor.

Original languageEnglish
Title of host publicationUV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XVII
Publication statusPublished - 2011 Nov 2
EventUV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XVII - San Diego, CA, United States
Duration: 2011 Aug 212011 Aug 24

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


ConferenceUV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XVII
Country/TerritoryUnited States
CitySan Diego, CA


  • Polarimeter
  • Polarimetry
  • X-rays astronomy
  • gamma-ray astronomy
  • gamma-ray burst
  • micro-satellites

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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