Harrison, F., Craig, W., Christensen, F., Hailey, C., Zhang, W., Boggs, S., …Urry, C. (2013). The Nuclear Spectroscopic Telescope Array (NuSTAR) high-energy X-ray mission. Astrophysical Journal, 770(2), Article 103. https://doi.org/10.1088/0004-637x/770/2/103