@article{oai:jaxa.repo.nii.ac.jp:00033143,
 author = {Takahashi, T. and Braga, J. and Gunji, S. and Kamae, T. and Miyazaki, S. and Murakami, H. and Neri, A. and Nomachi, M. and Sekimoto, Y. and Tanaka, M. and Tamura, T. and Yamaoka, N. and Yamagami, T.},
 journal = {宇宙科学研究所報告. 特集: 大気球研究報告},
 month = {Feb},
 note = {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 ^<57>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^<-6>/cm^2/s/keV and &acd;10^<-4>/cm^2/s by 10^4s observation for the continuum spectrum and line spectrum respectively., 資料番号: SA0167027000},
 pages = {61--81},
 title = {New Hard X-ray/Gamma-ray Telescope-Welcome 1 and Observation of SN 1987 A},
 volume = {30},
 year = {1992}
}