Lachowicz, P.; Gupta, A. C.; Gaur, H.; Wiita, P. J.
(2009)
We report a possible detection of an ̴4.6-h quasi-periodic oscillation (QPO) in the 0.3–10 keV emission of the high-energy peaked blazar PKS 2155−304 from a 64 ks observation by the XMM-Newton EPIC/pn detector. We identify ...