Singh, J; Sakurai, Takashi; Ichimoto, K; Takeda, Aki
(Astronomical Society of Japan, 2002)
We have obtained spectrographic observations of several coronal regions in three emission lines (6374Å [Fe X ], 10747Å [Fe XIII ], and 10798Å [Fe XIII ]) simultaneously. The 25-cm coronagraph at Norikura Observatory and ...