6 papers
Learning about Jets from Observations of Blazars
Marek Sikora, Greg Madejski
Jets, paving their way outward through the inner regions of active nuclei, Compton-interact with the UV radiation from an accretion disc and broad emission line region. We calculat…
Synergy Between Observations of AGN with GLAST and MAXI - Detecting X-ray Precursors of Gamma-ray Flares in Blazars
Greg Madejski, Marek Sikora, Tsuneyoshi Kamae
The EGRET instrument onboard of CGRO detected a number of gamma-ray flares from blazars, and it is expected that GLAST, to be launched in 2006, should detect many more such flares.…
Five-year Monitorings of TeV Blazars with ASCA and RXTE
J. Kataoka, T. Takahashi, F. Takahara +8
We study the temporal/spectral variability of two extragalactic TeV sources, Mrk 421 and Mrk 501, based on 5-year observations with the ASCA and RXTE satellites. We found that the…
Modeling Flares Produced in Blazars
M. Sikora, M. Blazejowski, R. Moderski +1
We model light curves of flares observed in blazars, assuming that they are produced by relativistic electrons/positrons injected by forward-reverse shocks traveling down the jet w…
Black holes in Active Galactic Nuclei: observations
Greg M. Madejski
This paper summarizes the observations which provide the best evidence for the presence of black holes in active galactic nuclei. This includes: X-ray variability; kinematical stud…
Variability, Power, and Pair Content of AGN Jets
Marek Sikora, Greg Madejski, Mitchell Begelman
Simultaneous observations of blazars in different spectral regimes imply that the amplitude of variability depends on the observational band. Both in the low energy spectral compon…