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Title:
Intrinsic Curvature in the X-ray Spectra of BL Lacertae Objects
Authors:
Perlman, E. S.; Daugherty, T.; Georganopoulos, M.; Koratkar, A.; Madejski, G.; Andersson, K.; Krolik, J.; Rector, T.; Stocke, J. T.; Wagner, S.; Aller, M.; Aller, H.; Allen, M. G.
Publication:
Blazar Variability Workshop II: Entering the GLAST Era ASP Conference Series, Vol. 350, Proceedings of the Conference Held 10-12 April, 2005 at Florida International University, Miami, Florida, USA. Edited by H. R. Miller, K. Marshall, J. R. Webb, and M. F. Aller. San Francisco: Astronomical Society of the Pacific, 2006., p.191
Publication Date:
07/2006
Origin:
ASP
Bibliographic Code:
2006ASPC..350..191P

Abstract

We report results from XMM-Newton observations of thirteen X-ray bright BL Lacertae objects, selected from the Einstein Slew Survey sample. The survey was designed to look for evidence of either curvature or line features in the X-ray spectra. Previous data had suggested absorption features in the X-ray spectra of some BL Lacs; however, none of our spectra show convincing examples of lines, either in absorption or emission. We find significant evidence for a constant, likely intrinsic, curvature in 14 of 17 X-ray spectra. We model the curvature as resulting from episodic particle acceleration.

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