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Radio core dominance of Fermi/LAT-detected AGNs
We present a sample of 4388 AGNs with available radio core-dominance parameters-defined as the ratio of the core flux densities to the extended ones, R=S_core_/S_ext._ - which... -
Extragalactic linear polarization meas. agglomeration
In the framework of the Standard Model Extension (SME), we present improved constraints on anisotropic Lorentz invariance and Charge-Parity-Time (CPT) violation by searching for... -
Hard X-ray catalog of Sagittarius arm
The images of the Sagittarius arm tangent obtained with the IBIS telescope of the INTEGRAL observatory in the energy range 18-120keV during their observations in the spring of... -
INTEGRAL X-ray source in Galactic center
From August 23 through September 24, 2003, the INTEGRAL Observatory conducted a deep survey of Galactic-Center region with a record-breaking sensitivity at energies above 20keV.... -
gamma-ray properties of FR-Is and BL Lacs
Our knowledge of Giga-electron volt (GeV) radio galaxies has been revolutionized by the Fermi-LAT Telescope, which provides an excellent opportunity to study the physical... -
Sample of Fermi FSRQs
The location of {gamma}-ray-emitting region in blazars has been an open issue for several decades and is still being debated. We use the Paliya et al. sample of 619... -
Gamma-ray emitting jetted AGN
We considered the fourth catalog of gamma-ray point sources produced by the Fermi Large Area Telescope (LAT) and selected only jetted active galactic nuclei (AGN) or sources... -
GRB isotropic energy function
Gamma-ray bursts (GRBs) are brief, intense, gamma-ray flashes in the universe, lasting from a few milliseconds to a few thousand seconds. For short gamma-ray bursts (sGRBs) with... -
gamma-ray spectrum for Fermi blazars
The curvature of the {gamma}-ray spectrum in blazars may reflect the intrinsic distribution of emitting electrons, which will further give some information on the possible... -
Sample of Fermi Blazars
We study the {gamma}-ray luminosity and beaming effect for Fermi blazars. Our results are as follows. (i) There are significant correlations between {gamma}-ray luminosity and... -
Doppler factor for a Fermi blazar sample
We selected 457 blazars (193 flat spectrum radio quasars, 61 low-synchrotron peaked blazars, 69 intermediate-synchrotron peaked blazars and 134 high-synchrotron peaked blazars)... -
{gamma}-ray Doppler factor for Fermi blazars
Observations suggest that gamma-ray loud blazars are strongly beamed. The Fermi mission has detected many of blazars, which provide us with a good opportunity to investigate the... -
Anomalous gamma-ray excess emissions
An anomalous gamma-ray excess emission has been found in the Fermi Large Area Telescope data covering the centre of the Galaxy. Several theories have been proposed for this... -
Power of relativistic jets in blazars
Theoretical models for the production of relativistic jets from active galactic nuclei predict that jet power arises from the spin and mass of the central supermassive black... -
HETE Trigger Information
At 15:54:53.123 UT on 23 June, the HETE FREGATE and WXM instruments detected and localized an intense burst from SGR1806-20, a soft gamma-ray repeater. This event, disseminated... -
GRB 141220A light curves
We report the earliest ever detection of optical polarization from a GRB forward shock (GRB 141220A), measured 129.5-204.3s after the burst using the multicolour RINGO3 optical... -
Jet efficiencies and black hole spins in quasars
The mechanisms responsible for the production of relativistic jets from supermassive black holes (SMBHs) accreting at near-Eddington rates are not well understood. Simple... -
GRB hydrogen column densities
It is known that the GRB equivalent hydrogen column density (N_HX_) changes with redshift and that, typically, N_HX_ is greater than the GRB host neutral hydrogen column... -
Comparison between GRB afterglows and AT2017gfo
Multimessenger astronomy received a great boost following the discovery of kilonova (KN) AT2017gfo, the optical counterpart of the gravitational wave source GW170817 associated... -
The 2BIGB gamma-ray blazars catalog
This paper presents the results of a {gamma}-ray likelihood analysis over all the extreme and high synchrotron peak blazars (EHSP and HSP) from the 3HSP catalogue. We...
