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The contribution from blazar cascade emission to the extragalactic gamma-ray background: What a role does the extragalactic magnetic field play?
diffuse radiation galaxies active gamma rays general
2012/2/21
We estimate the contribution to the extragalactic gamma-ray background (EGRB) from both intrinsic and cascade emissions produced by blazars using a simple semi- analysis method for two models of the b...
Unveiling the nature of IGR J17177-3656 with X-ray, NIR and Radio observations
Unveiling IGR J17177-3656 X-ray NIR Radio observations
2011/9/26
We report on the first broad-band (1-200 keV) simultaneous Chandra-INTEGRAL observations of the recently discovered hard X-ray transient IGR J17177-3656 that took place on 2011, March 22, about two we...
Quark-Nova Explosion inside a Collapsar：Application to Gamma Ray Bursts
Quark-Nova Explosion Collapsar Gamma Ray Bursts
2009/9/4
If a quark-nova occurs inside a collapsar, the interaction between the quark-nova ejecta (relativistic iron-rich chunks) and the collapsar envelope leads to features indicative of those observed in Ga...
INFLUENCE OF SOLAR X-RAY FLARES ON THE EARTH-IONOSPHERE WAVEGUIDE
Earth-Sun ares-Sun x-rays, gamma rays
2009/2/24
A simultaneous analysis of solar
are X-ray irradiance and VLF
signal amplitude on the GQD/22.1 kHz trace was carried out. Solar
are data were
taken from GOES 12 satellite listings. The VLF ampli...