منابع مشابه
Intrinsic Spectra of the TeV Blazars Mrk 421 and Mrk 501
Energy spectra of γ-ray blazars may contain an imprint from the cosmic infrared background radiation due to γ-ray absorption (pair-production) by soft photons constituting the extragalactic background light (EBL). The signature of this imprint depends on the spectral shape of the EBL. In this work we correct the observed spectra of Mrk 421 and Mrk 501 for absorption using different possible rea...
متن کاملLimits from rapid TeV variability of Mrk 421
The extreme variability event in the TeV emission of Mrk 421, recently reported by the Whipple team, imposes the tightest limits on the typical size of the TeV emitting regions in Active Galactic Nuclei (AGN). We examine the consequences that this imposes on the bulk Lorentz factor of the emitting plasma and on the radiation fields present in the central region of this Active Nucleus. No strong...
متن کاملNewton timing mode observations of Mrk 421
We present the results of a detailed temporal analysis of the bright BL Lac object Mrk 421 using the three available long timing mode observations by the EPIC PN camera. This detector mode is characterized by its long life time and is largely free of photon pile-up problems. The source was found in different intensity and variability states differing by up to more than a factor of three in coun...
متن کاملNear Infrared Intraday Variability of Mrk 421
We report results from our monitoring of the BL Lac object Mrk 421 in the near-IR J band. The observations, aimed at studying the intraday variability (IDV) of the object, were carried out systematically over an extended (and near-continuous) period of eight nights from the 1.2m Mount Abu Infrared Telescope, India. There are limited studies for Mrk 421 in the J band for such an extended period....
متن کاملSpectral Monitoring of Mrk 421 during 2004
Daily monitoring of Mrk 421 in the X-ray and TeV bands during the first half of 2004 showed rapid flaring events above an elevated base flux level, culminating from March to May 2004 at an average flux level matching the highest detected flux state in 2001. Here we summarise the daily X-ray spectral variability observed with the RXTE-PCA instrument. We also explore the X-ray and TeV gamma-ray c...
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ژورنال
عنوان ژورنال: International Journal of Modern Physics: Conference Series
سال: 2014
ISSN: 2010-1945,2010-1945
DOI: 10.1142/s2010194514602063