Auroral X-ray images observed by B15-3 balloon over Syowa Station, Antarctica

• Main Authors: Hiromu Suzuki, Hisao Yamagishi, Toshiharu Kojima, Yo Hirasima, Hiroyuki Murakami, Natsuo Sato, Takamasa Yamagami, Masahiro Kodama, Hiroshi Fukunishi
• Format: Report
• Language: English
• Published: Department of Physics, Rikkyo University/National Institute of Polar Research/University of Electro-Communications/Department of Physics, Rikkyo University/Department of Physics, Rikkyo University/National Institute of Polar Research/The Institute of Space and Astronautical Science/Department of Physics, Yamanashi Medical College/Faculty of Science, Tohoku University 1988
• Subjects: Syowa Station; Antarc*; Antarctica
• Online Access: https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=4033; http://id.nii.ac.jp/1291/00004033/; https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=4033&item_no=1&attribute_id=18&file_no=1

A balloon observation of auroral X-rays was carried out over Syowa Station in Antarctica on December, 1985 by using a set of three inclined NaI (T1) scintillation counters. The energy-dependent structures of X-rays with energies greater than 22keV were measured. In a case study of the X-ray event occurred at 0145 UT on December 14,an X-ray source region moved toward lower latitudes with a velocity of about 1km/s. This experimental result was confirmed by a simulation calculation for auroral X-ray sources. The spatial distributions of auroral X-rays were found to be consistent with the north-south dependence of 30MHz cosmic noise absorption observed by a scanning-beam riometer at Syowa Station.