Aharonian, F., Akhperjanian, A.G., Anton, G., Barres de Almeida, U., Bazer-Bachi, A.R., Becherini, Y., Behera, B., Bernlöhr, K., Boisson, C., Bochow, A., et al.,, "Simultaneous Observations of PKS 2155-304 with HESS, Fermi, RXTE, and Atom: Spectral Energy Distributions and Variability in a Low State", , 2009