Results 161 to 170 of about 16,751 (259)

Submillimetre Polarimetry of Blazars [PDF]

open access: yes, 1996
We report on preliminary results from the first monitoring campaign of the submillimetre polarization of a sample of Blazars.
Murray, A.G.   +4 more
core   +2 more sources

The Search for Very High Energy γ-rays from Misaligned AGN [PDF]

open access: yes, 2013
The aim of this work is to study the potential for emission at very high energies (100 GeV) by misaligned active galactic nuclei (AGN) and the future prospects for observations of these objects with the next generation imaging atmospheric Cherenkov ...
CHEESEBROUGH, ALISTAIR
core  

Extreme Blazars Observed with MAGIC: Second Catalog Release

open access: yesThe Astrophysical Journal
Extremely high-peaked BL Lac objects—also named extreme blazars —are among the most energetic and persistent extragalactic accelerators in the Universe, defined by a synchrotron emission peaking above 10 ^17 Hz in X-rays.
K. Abe   +356 more
doaj   +1 more source

Extreme blazars

open access: yesAstroparticle Physics, 1999
TeV emission can be a common characteristic of low power blazars. This is in line with the sequence of blazars relating the observed bolometric luminosity with their overall spectral energy distribution. Detecting new TeV blazars, possibly at different redshifts, is important for studying the particle acceleration process operating in the jet, and it ...
openaire   +3 more sources

Circular polarization in intraday variable blazars [PDF]

open access: yes, 2002
We have measured Stokes IUQV of several rapidly variable and gamma-bright blazars and detected variable optical circular polarization, occasionally exceeding 1%, in 3C 279. We discuss possible origins for significant amounts of circular polarization (CP)
Mannheim, K, Wagner, SJ
core  

PKS J0805-0111: A Second Owens Valley Radio Observatory Blazar Showing Highly Significant Sinusoidal Radio Variability—The Tip of the Iceberg

open access: yesThe Astrophysical Journal
Owens Valley Radio Observatory observations of the supermassive black hole binary (SMBHB) candidate PKS 2131−021 revealed, for the first time, six likely characteristics of the phenomenology exhibited by SMBHBs in blazars, of which the most unexpected ...
P. V. de la Parra   +25 more
doaj   +1 more source

Modeling Blazar Broadband Emission with a Convolutional Neural Network. I. Synchrotron Self-Compton Model

open access: yesThe Astrophysical Journal
Modeling the multiwavelength spectral energy distributions (SEDs) of blazars provides key insights into the underlying physical processes responsible for the emission.
D. Bégué   +7 more
doaj   +1 more source

From Equipartition to Curvature: The Spectral Evolution of 4FGL Blazars

open access: yesThe Astrophysical Journal Supplement Series
We investigate the evolution of spectral energy distribution (SED) and underlying electron energy distribution (EED) by modeling the nearly simultaneous broadband spectra of selected bright 4FGL blazars, in the context of a combined cooling and ...
Muhammad S. Anjum   +4 more
doaj   +1 more source

Optical Quasi-Periodic Oscillation of Blazar PKS 1440-389 in the TESS Light Curve

open access: yesUniverse
We report the results of time series analysis of blazar PKS 1440-389, observed by the Transiting Exoplanet Survey Satellite (TESS) in two sectors. We find that the source has a quasi-periodic oscillation (QPO) of about 3.1 days for sector 11 and around 3.
He Lu   +9 more
doaj   +1 more source

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