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Proceedings Paper

Development micro-satellite TSUBAME for polarimetry of gamma-ray bursts
Author(s): Yoichi Yatsu; Takahiro Enomoto; Kosuke Kawakami; Kazuki Tokoyoda; Takahiro Toizumi; Nobuyuki Kawai; Kazuya Ishizaka; Saburo Matsunaga; Takeshi Nakamori; Jun Kataoka; Sin Kubo
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Paper Abstract

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.

Paper Details

Date Published: 13 September 2011
PDF: 11 pages
Proc. SPIE 8145, UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XVII, 814508 (13 September 2011); doi: 10.1117/12.893372
Show Author Affiliations
Yoichi Yatsu, Tokyo Institute of Technology (Japan)
Takahiro Enomoto, Tokyo Institute of Technology (Japan)
Kosuke Kawakami, Tokyo Institute of Technology (Japan)
Kazuki Tokoyoda, Tokyo Institute of Technology (Japan)
Takahiro Toizumi, Tokyo Institute of Technology (Japan)
Nobuyuki Kawai, Tokyo Institute of Technology (Japan)
Kazuya Ishizaka, Tokyo Institute of Technology (Japan)
Saburo Matsunaga, Tokyo Institute of Technology (Japan)
Japan Aerospace Exploration Agency (Japan)
Takeshi Nakamori, Waseda Univ. (Japan)
Jun Kataoka, Waseda Univ. (Japan)
Sin Kubo, Clear Pulse Co., Ltd. (Japan)

Published in SPIE Proceedings Vol. 8145:
UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XVII
Oswald H. Siegmund, Editor(s)

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