Long-Term X-Ray and TeV variability of Mrk 501
Abstract
We present X-ray observations of the blazar Mrk501 obtained with RXTE during 1997, 1998, 1999, 2000, and 2004. The goal of this study is twofold: 1) characterize the long-term X-ray flux and spectral variability of the source with a model-independent analysis, and 2) investigate the X-ray and TeV correlation on long timescales. The spectral and temporal variability properties appear to be markedly different compared to those of non-jet-dominated radio-loud and radio-quiet AGN monitored with RXTE. To investigate the X-ray/TeV correlation on long timescales we compared RXTE data with HEGRA and Whipple historical light curves. We confirm the presence of a direct correlation, which appears to be stronger when the source is brighter. The analysis of individual flares shows that the X-ray\TeV correlated activity is heterogeneous. However, more sensitive TeV observations are necessary to confirm these findings, and to put tighter constraints on jet models (abridged).
Cite
@article{arxiv.astro-ph/0603693,
title = {Long-Term X-Ray and TeV variability of Mrk 501},
author = {M. Gliozzi and R. Sambruna and I. Jung and H. Krawczynski and D. Horan and F. Tavecchio},
journal= {arXiv preprint arXiv:astro-ph/0603693},
year = {2009}
}
Comments
20 pages, 11 figures, accepted for publication in ApJ