منابع مشابه
X-ray spectral variability of TeV blazars during rapid flares
The spectral energy distribution (SED) of TeV blazars peaks both at keV and TeV energies. The X-ray emission is generally believed to originate in the synchrotron emission from relativistic electrons (and positrons) in the jet of these sources, while the origin of the gamma-ray emission is still being debated. We report results from a systematic study of X-ray spectral variability of Mrk 421 an...
متن کاملX-ray Intraday Variability of Five Tev Blazars with Nustar
We have examined 40 NuSTAR light curves (LCs) of five TeV emitting high synchrotron peaked blazars: 1ES 0229+200, Mrk 421, Mrk 501, 1ES 1959+650 and PKS 2155−304. Four of the blazars showed intraday variability in the NuSTAR energy range of 3–79 keV. Using an auto correlation function analysis we searched for intraday variability timescales in these LCs and found indications of several between ...
متن کاملX–ray Observations of TeV Blazars and Multi-Frequency Analysis
The non-thermal spectra of blazars, observed from radio to GeV/TeV γ–rays, reveal two pronounced components, both produced by radiation by energetic particles. One peaks in the IR to soft X–ray band, radiating via the synchrotron process; the other, peaking in the high-energy γ–rays, is produced by the Compton process. These spectra – and, in particular, the ASCA data – suggest that the origin ...
متن کاملVariability Time Scales of TeV Blazars Observed in the ASCA Continuous Long-Look X–ray Monitoring
Three uninterrupted, long (lasting respectively 7, 10, and 10 days) ASCA observations of the well-studied TeV-bright blazars Mrk 421, Mrk 501 and PKS 2155–304 all show continuous strong X–ray flaring. Despite the relatively faint intensity states in 2 of the 3 sources, there was no identifiable quiescent period in any of the observations. Structure function analysis shows that all blazars have ...
متن کاملX–ray Emission in Gamma-ray Blazars
As shown by Maraschi (this volume) the overall spectral energy distribution (SED) of the blazars detected by EGRET shows two peaks, in a ν–νF (ν) plot. With few exceptions, the minimum between these two peaks occurs in the X–ray range. We can exploit this observational fact to constrain the models proposed to account for the SED of blazars, and to reach an important conclusion: the conversion o...
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ژورنال
عنوان ژورنال: Journal of Astrophysics and Astronomy
سال: 2011
ISSN: 0250-6335,0973-7758
DOI: 10.1007/s12036-011-9045-0