PROF. L. VEGARD'S recent note 1 on the atomic lines in the auroral spectrum calls for some comments. While it is true that the presence of the Vegard-Kaplan bands in auroral spectra was first observed ...
Figure 1: Simultaneous spectral fits to the stacked XMM-Newton RGS and EPIC/PN spectra of NGC 1313 X-1. The emission lines that appear in the two ultraluminous X-ray sources NGC 1313 X-1 and NGC 5408 ...
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