BL Lac X-ray Spectra: simpler than we thought

Details BL Lac X-ray Spectra: simpler than we thought BL Lac X-ray Spectra: simpler than we thought

2004-03-24

arxiv.org/abs/astro-ph/0403575v1

Astronomy and Astrophysics

Astrophysics

4 pages, 1 figure; to be published in proceedings of the Cozumel meeting on "Multiwavelength Surveys for AGN", Cozumel 2003

Scientific paper

We report results from {\it XMM-Newton} observations of thirteen X-ray bright BL Lacertae objects, selected from the {\it Einstein} Slew Survey sample. The spectra are generally well fit by power-law models, with four objects having hard ($\alpha<1; F_\nu \propto \nu^{-\alpha}$) spectra that indicates synchrotron peaks at $>5$ keV. None of our spectra show line features, indicating that soft X-ray absorption ``notches'' must be rare amongst BL Lacs, rather than common or ubiquitous as had previously been asserted. We find significant curvature in most of the spectra. This curvature is almost certainly intrinsic, as it appears nearly constant from 0.5 to 6 keV, an observation which is inconsistent with the small columns seen in these sources.

Affiliated with

Also associated with

No associations

Rating

BL Lac X-ray Spectra: simpler than we thought does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with BL Lac X-ray Spectra: simpler than we thought, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and BL Lac X-ray Spectra: simpler than we thought will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-89177