New Hard X-ray/Gamma-ray Telescope-Welcome 1 and Observation of SN 1987 A

Authors :: Takahashi, T.
Braga, J.
Gunji, S.
Kamae, T.
Miyazaki, S.
Murakami, H.
Neri, A.
Nomachi, M.
Sekimoto, Y.
Tanaka, M.
Tamura, T.
Yamaoka, N.
Yamagami, T.
Source :: 宇宙科学研究所報告. 特集: 大気球研究報告. 30:61-81
Publication Year :: 1992
Publisher :: 宇宙科学研究所, 1992.
Abstract: We have developed a new kind of phoswih counters (the well-type phoswich counter) that is capable of detecting very low flux hard X-rays/gamma-rays (60-800 keV) from astronomical object. We flew the first prototype detector system (Welcome-1) from Cachoeira Paulista, Brazil in November 1990. The objective was to detect ^Co (122,136keV) and continuum emission from SN1987A. The background spectrum taken at an altitude of 4g/cm^2 indicates that the 3σ sensitivity reaches &acd;a few×10^/cm^2/s/keV and &acd;10^/cm^2/s by 10^4s observation for the continuum spectrum and line spectrum respectively.<br />資料番号: SA0167027000

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