A ∼4.6 h quasi-periodic oscillation in the BL Lacertae PKS 2155-304?

dc.contributor.author	Lachowicz, P.
dc.contributor.author	Gupta, A. C.
dc.contributor.author	Gaur, H.
dc.contributor.author	Wiita, P. J.
dc.date.accessioned	2009-10-30T10:00:54Z
dc.date.available	2009-10-30T10:00:54Z
dc.date.issued	2009
dc.identifier.uri	http://hdl.handle.net/123456789/330
dc.description.abstract	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 a total modulation of ̴5% in the light curve and confirm that nominal period by periodogram, structure function, and wavelet analyses. The limited light curve duration allows the capture of only 3.8 cycles of this oscillation and thus precludes a very strong claim for this QPO, despite a nominally high (≥3σ) statistical significance. We briefly discuss models capable of producing an X-ray QPO of such a period in a blazar.	en_US
dc.language.iso	en	en_US
dc.relation.ispartofseries	aa506-L17
dc.subject	Galaxies, Active- BL Lacertae Objects, PK2155-304-X-rays	en_US
dc.title	A ∼4.6 h quasi-periodic oscillation in the BL Lacertae PKS 2155-304?	en_US
dc.type	Article	en_US