@inproceedings{oai:jaxa.repo.nii.ac.jp:00005311,
 author = {岸本, 祐二 and 郡司, 修一 and 石川, 優詩 and 高田, 真 and 東海林, 礼之 and 田中, 佑麿 and 門叶, 冬樹 and 櫻井, 敬久 and 三原, 建弘 and 林田, 清 and 穴吹, 直久 and 常深, 博 and 斎藤, 芳隆 and 小浜, 光洋 and 鈴木, 素子 and 岸本, 俊二 and Kishimoto, Yuji and Gunji, Shuichi and Ishikawa, Y and Takada, M. and Toukairin, N and Tanaka, Y and Tokanai, Fuyuki and Sakurai, Hirohisa and Mihara, Tatehiro and Sato, T and Hayashida, Kiyoshi and Anabuki, Naohisa and Ota, M and Tsunemi, Hiroshi and Narita, Tomohiko and Saito, Yoshitaka and Kohama, Mitsuhiro and Suzuki, Motoko and Kishimoto, Shunji},
 book = {宇宙航空研究開発機構特別資料, JAXA Special Publication: Astrophysics with All-Sky X-Ray observations: 3rd International MAXI Workshop},
 month = {Feb},
 note = {Astrophysics with All-Sky X-Ray observations: 3rd International MAXI Workshop (RIKEN, 10-12 June 2008), On X-ray and hard X-ray astronomy, the polarization is the last key. It is very useful to understand the radiation mechanism of gamma-ray bursts and pulsars, magnetic structure of supernova remnants, space-time curvature near black hole, and so on. However, the observation for the polarization has been rarely carried out for about 30 years since the observation of the Crab Nebula in X-ray region. It is because of the difficulty for development of the polarimeter with high sensitivity. We have been developing a hard X-ray polarimeter with high sensitivity, called as a PHENEX (Polarimetry for High ENErgy X rays) polarimeter. The PHENEX polarimeter is Compton scattering type polarimeter sensitive to the energy range from 40 keV to 200 keV and is constructed assembling several detectors called as "unit counter". The unit counter is a detector utilizing Compton scattering and it has a modulation factor of 53 % and a detection efficiency of 20 % at 80 keV. We constructed prototype PHENEX polarimeter with four unit counters and carried out a preliminary observation of the Crab Nebula on Jun. 13th 2006 as a balloon-borne experiment. Though we confirmed that the PHENEX detected hard X rays from the Crab Nebula with significance of 8 sigma, the degree and the direction of the polarization could not be determined with high accuracy because the attitude control system does not function correctly. Now we are improving the performance of the ACS and the polarimeter to realize the observation of the Crab Nebula with higher accuracy in the next balloon-borne experiment. In this paper, we will present the follows: (1) summary of the PHENEX polarimeter and preliminary observation of Crab Nebula; (2) fix of the ACS trouble; (3) improvement of the PHENEX polarimeter; (4) expected performance for the next observation., Physical characteristics: Original contains color illustrations, 資料番号: AA0064306072, レポート番号: JAXA-SP-08-014E},
 pages = {380--385},
 publisher = {宇宙航空研究開発機構, Japan Aerospace Exploration Agency (JAXA)},
 title = {Observation of polarization in hard X-Ray region with PHENEX polarimeter},
 volume = {JAXA-SP-08-014E},
 year = {2009}
}