Muno et al. demonstrate a correlation between SiO and X-rays in the Galactic Center
M. A. Amo-Baladrón, J. Martín-Pintado, M. R. Morris, M. P. Muno and N. J. Rodríguez-Fernández. (2008) Correlation between SiO and X-ray emission in the Galactic Center. Journal of Physics: Conference Series, 131: 012017. CaltechAUTHORS