Gamma-ray observations of blazars and the intergalactic magnetic field spectrum
نویسندگان
چکیده
منابع مشابه
Radio Observations of Gamma-ray Blazars
Starting in 1991 we have performed a regular monitoring of EGRET sources with the Effelsberg 100-m telescope and the IRAM 30-m at Pico Veleta. In comparison with data on a sample of flat-spectrum quasars which have not been seen by EGRET we search for correlations of any kind in the behaviour of FSRQ's in the radio and gamma-ray regime. While there is no radio-to-gamma-ray luminosity correlatio...
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The intergalactic magnetic field (IGMF) may leave an imprint on the angular anisotropy of the extragalactic gamma-ray background through its effect on electromagnetic cascades triggered by interactions between very high energy photons and the extragalactic background light. A strong IGMF will deflect secondary particles produced in these cascades and will thus tend to isotropize lower energy ca...
متن کاملGamma-Ray Blazars
Roughly 60 blazars have been identiied with > 100 MeV EGRET gamma-ray sources, and exhibit inferred isotropic luminosities as large as 3 10 49 ergs s ?1. The two most remarkable characteristics about the EGRET observations are that the-ray luminosity often dominates the bolometric power, and that variability on timescales at least as short as a day is seen from several sources in their aring st...
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We will present a summary of the observations of blazars by the Energetic Gamma Ray Experiment Telescope (EGRET) on the Compton Gamma Ray Observatory (CGRO). EGRET has detected high energy γray emission at energies greater than 100 MeV from more that 50 blazars. These sources show inferred isotropic luminosities as large as 3× 10 ergs s. One of the most remarkable characteristics of the EGRET o...
متن کاملBlazars and Gamma Ray Bursts
Blazars and Gamma Ray Bursts (GRBs) are the fastest objects known so far. The radiation we see from these sources originates in a jet of similar aperture angle, and we think it is the result of the conversion of some of the jet kinetic energy into random motion of the emitting particles. Mechanisms for producing, collimating and accelerating the jets in these sources are uncertain, and it is fr...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2015
ISSN: 1550-7998,1550-2368
DOI: 10.1103/physrevd.91.123514