The finding shows that whatever is driving blazar
jets operates right near the central black hole, which can weigh in at millions or billions of times the mass of the sun.
Title: Long-term monitoring of the optical polarization in the TeV blazar
The Smithsonian team said such blazars
emit gamma rays 1,000 times more energetic than those detected by orbiting spacecraft like Compton.
By the 2000s Cherenkov telescopes in Arizona, the Canary Islands and Africa had detected very energetic gamma rays from powerful blazars
WISE observations have led to numerous discoveries, including the elusive, coolest class of stars, the first known "Trojan" asteroid to share the same orbital path around the sun as Earth, and locations of supermassive black holes throughout the universe called blazars
are supermassive black holes in the centers of galaxies with brilliant jets directly pointed at us like a flashlight beam.
Progress is expected in a variety of science questions, including the physics of particle acceleration in relativistic jets, the unification between blazars
and radio galaxies and the blazar
sequence, population studies and questions of cosmological evolution of AGN, and explorations of signatures of gamma-gamma absorption both by the Extragalacic Background Light and by IR -UV radiation fields intrinsic to the AGN.
In this study, the researchers focused on distinctive galaxies called blazars
(4), which are several billion light years away.
WEBT--the Whole Earth Blazar
Telescope is a network of optical, near-infrared, and radio observers which aims to obtain continuous multi-frequency monitoring of blazars
in order to understand their continuum emission.
General topics include optical variability, including long-term optical quasar variability, IR variability, including the correlation of near infrared and optical variability on NGC 4151, x-ray variability, including the relationship between optical and x-ray variability in Seyfert galaxies, radio variability, including 3C 120 and the disk-jet connection, blazars
, including photometric and polarimetric observations of BL Lac objects in the optical region, including flows and shocks in Seyfert Galaxy nuclei and general considerations, including closing thoughts on AGN variability by the conference chair.
are the brightest of active galactic nuclei, and many emit very-high-energy gamma rays.
07 along with dozens of other blazars
using several facilities, including the VLBA.