Results 111 to 120 of about 6,255 (211)

Rapid optical variability of TeV blazars [PDF]

, 2011
In this first systematic attempt to characterize the intranight optical variability (INOV) of TeV-detected blazars, we have monitored a well-defined set of nine TeV blazars on total 26 nights during 2004-10. In this R- or V-band-monitoring programme only
G. C. Anupama, null Gopal-Krishna, S. Joshi, Karthick, Chrisphin, Arti Goyal, Chrisphin Karthick, D. K. Sahu, Anupama, G. C., Joshi, S., Wiita, Paul J., Gopal-Krishna,, Sahu, D. K., Paul J. Wiita, Goyal, Arti, Sagar, R., R. Sagar   +15 more
core   +1 more source

Cosmic-void observations reconciled with primordial magnetogenesis. [PDF]

Nat Commun, 2023
Hosking DN, Schekochihin AA.
europepmc   +1 more source

Optical Outburst of the Blazar S4 0954+658 in Early 2015

Galaxies, 2016
We analyze the behavior of the BL Lac object S4 0954+658 during an unprecedented bright optical flare in early 2015. The optical flare was accompanied by a powerful γ -ray flare and the detection of very-high-energy γ -ray emission.
Daria Morozova, Valeri Larionov, Svetlana Jorstad, Alan Marscher, Yulia Troitskaya, Ivan Troitskiy, Dmitriy Blinov, Georg Borman, Mark Gurwell   +8 more
doaj   +1 more source

Long-Term Multi-Band and Polarimetric View of Mkn 421: Motivations for an Integrated Open-Data Platform for Blazar Optical Polarimetry

Galaxies, 2017
In this work, by making use of the large software and database resources made available through online facilities such as the ASI Science Data Center (ASDC), we present a novel approach to the modelling of blazar emission whereby the multi-epoch SED for ...
Ulisses Barres de Almeida, Bernardo M. O. Fraga, Paolo Giommi, Narek Sahakyan, Sargis Gasparyan, Carlos H. Brandt   +5 more
doaj   +1 more source

A FLASH on blazars

Astronomy & Astrophysics
This work investigates the multi-wavelength properties of 165 sources from the Fermi Large Area Telescope Fourth Source Catalog Data Release 4 (4FGL), with the aim of identifying counterparts in the Australian SKA Pathfinder (ASKAP) First Large Absorption Survey in the HI (FLASH) continuum.
M. Behiri, E. K. Mahony, E. Sadler, E. Kerrison, A. Traina, M. V. Zanchettin, V. Galluzzi, A. Lapi, M. Massardi   +8 more
openaire   +2 more sources

Blazars in the re-ionization epoch

, 2021
Search and Study of Blazars in the early Universe PhD thesis by Silvia Belladitta , Matr. 733846 The aim of this thesis is to identify and characterize blazars at z>4, to provide more constraints on the properties of high-z radio-loud (RL ...
BELLADITTA SILVIA
core  

Probes of the Inner Jets of Blazars [PDF]

, 1996
I review models for the 'inner jet" in blazars, the section that connects the central engine with the radio jet. I discuss how the structure and physics of the inner jet can he explored using millimeter-wave VLBI as well as multiwaveband observations of ...
Marscher, Alan P.
core  

Submillimetre polarimetry of blazars [PDF]

, 1996
We report on preliminary results from the first monitoring campaign of the submillimetre polarization of a sample of Blazars.
Hobson, E. I., Hough, J. H., Gear, Walter Kieran, Nartallo, R., Murray, A. G.   +4 more
core   +2 more sources

Particle acceleration in Blazars

, 2010
Understanding the variable emission of blazars observed with gamma-ray telescopes and Fermi has become a major challenge for theoretical models of particle acceleration. Here, we introduce a novel time-dependent emission model in which the maximum energy
Felix Spanier, Matthias Weidinger
core   +1 more source

CURVATURE OF THE SPECTRAL ENERGY DISTRIBUTIONS OF BLAZARS

, 2014
In this paper, spectral energy distributions (SED) of both synchrotron and inverse Compton (IC) components of a sample of Fermi bright blazars are fitted by a log-parabolic law.
Chen, Liang
core