Results 91 to 100 of about 33,851 (274)
Blazar Optical Variability in the Palomar-QUEST Survey [PDF]
, 2009 We study the ensemble optical variability of 276 FSRQs and 86 BL Lacs in the Palomar-QUEST Survey with the goal of searching for common fluctuation properties, examining the range of behavior across the sample, and characterizing the appearance of ...
Adelman-McCarthy +29 more
core +1 more source
Multiwavelength observations of blazars [PDF]
Proceedings of 11th INTEGRAL Conference Gamma-Ray Astrophysics in Multi-Wavelength Perspective — PoS(INTEGRAL2016), 2017 The INTEGRAL mission has played a major role in blazar science, thanks to its sensitive coverage of a spectral region (3-100 keV) that is critical for this type of sources, to its flexibility of scheduling and to the large field of view of its cameras.
openaire +4 more sources
Accretion discs in blazars [PDF]
Monthly Notices of the Royal Astronomical Society, 2009 Accepted for publication (17 August 2009) in ...
Jolley, E. J. D. +3 more
openaire +4 more sources
Open Universe for Blazars: a new generation of astronomical products based on 14 years ofSwift-XRT data [PDF]
Astronomy & Astrophysics, 2019 Aims.Open Universe for Blazars is a set of high-transparency multi-frequency data products for blazar science, and the tools designed to generate them.
P. Giommi +16 more
semanticscholar +1 more source
Sharp Polarimetric Eyes: More Trees than Forest?
Galaxies, 2016 The Fermi Gamma-ray Space Telescope (Fermi) has focused the intensive multi-wavelength and international observational effort on blazars since it was launched in 2008. Part of this effort involves systematic monitoring of the highly variable polarization
Paul S. Smith
doaj +1 more source
Blazar Jets as Possible Sources of Ultra-High Energy Photons: A Short Review
Universe, 2022 In this paper, I present a qualitative discussion on the prospect of production of ultra-high photons in blazars. The sources are a subclass of active galactic nuclei which host supermassive black holes and fire relativistic jets into the intergalactic ...
Gopal Bhatta
doaj +1 more source
, 2014 We present an analysis of the optical spectra available in the Sloan Digital Sky survey data release nine (SDSS DR9) for the blazars listed in the ROMA-BZCAT and for the gamma-ray blazar candidates selected according to their IR colors. First, we adopt a
, +9 more
core +2 more sources
BAT AGN Spectroscopic Survey. XVI. General Physical Characteristics of BAT Blazars [PDF]
Astrophysical Journal, 2019 The recently released 105-month Swift-Burst Alert Telescope (BAT) all-sky hard X-ray survey catalog presents an opportunity to study astrophysical objects detected in the deepest look at the entire hard X-ray (14–195 keV) sky.
V. Paliya +15 more
semanticscholar +1 more source
Gamma-Ray Cosmology and Tests of Fundamental Physics
Galaxies, 2022 The propagation of gamma-rays over cosmological distances is the subject of extensive theoretical and observational research at GeV and TeV energies. The mean free path of gamma-rays in the cosmic web is limited above 100 GeV due to the production of ...
Jonathan Biteau, Manuel Meyer
doaj +1 more source
Evaluating quasi-periodic variations in the γ-ray light curves of Fermi-LAT blazars [PDF]
Astronomy & Astrophysics, 2019 Context. The detection of periodicities in the light curves of active galactic nuclei (AGNs) could have profound consequences for our understanding of the nature and radiation physics of these objects.
F. A. Benkhali +10 more
semanticscholar +1 more source