Results 121 to 130 of about 33,870 (293)
The Blazar Main Sequence [PDF]
The Astrophysical Journal, 2002 26 pages, 2 eps figures, revised version #2, accepted for pubblication in ...
Cavaliere, A., D'Elia, V.
openaire +4 more sources
X-ray properties of z > 4 blazars [PDF]
Monthly notices of the Royal Astronomical Society, 2019 We present the X-ray analysis of the largest flux-limited complete sample of blazar candidates at z > 4 selected from the Cosmic Lens All Sky Survey (CLASS).
L. Ighina +8 more
semanticscholar +1 more source
Lessons from the apparent peculiar nature of the star TYC 6544‐3483‐1
Astronomische Nachrichten, Volume 345, Issue 4, May 2024.Abstract We report a radio and optical study of the star TYC 6544‐3483‐1 originally selected as a follow‐up target in the course of our efforts to cross‐identify Galactic high‐energy sources. The star by itself finally turned out to be a very ordinary main‐sequence star despite the initial expectations that apparently pointed to the contrary.
Josep Martí +5 more
wiley +1 more source
GeV Variability Properties of TeV Blazars Detected by Fermi-LAT
The Astrophysical Journal Supplement SeriesVariability is a prominent observational feature of blazars. The high-energy radiation mechanism of jets has always been important but is still unclear.
Gege Wang +3 more
doaj +1 more source
Galaxies, 2017 The University of Michigan 26-m paraboloid was dedicated to obtaining linear polarization and total flux density observations of blazars from the mid-1960s until June 2012, providing an unprecedented record tracking centimeter-band variability over ...
Margo F. Aller +2 more
doaj +1 more source
Galaxies, 2020 We use multi-frequency linear polarization observations from the University of Michigan blazar program (UMRAO), in combination with radiative transfer simulations of emission from a relativistic jet, to investigate the time-dependent flow conditions ...
Margo Aller +3 more
doaj +1 more source
Active galactic nuclei at gamma-ray energies [PDF]
, 2016 Active Galactic Nuclei can be copious extragalactic emitters of MeV-GeV-TeV gamma rays, a phenomenon linked to the presence of relativistic jets powered by a super-massive black hole in the center of the host galaxy.
Dermer, Charles Dennison +1 more
core +3 more sources
Astronomy and Astrophysics Supplement Series, 1998 The results of both BVRI CCD photometric monitoring and fast photometry for 8 blazars and variable quasars are presented. There is intraday variability for 6 blazars and very short timescales (minutes to two hours) variability for 5 objects. Implications for relativistic beaming are briefly discussed.
Huiyu Ma +3 more
openaire +1 more source
Searches for steady neutrino emission from 3FHL blazars using eight years of IceCube data from the Northern hemisphere [PDF]
International Conference on Rebooting Computing, 2019 Located at the South Pole, the IceCube Neutrino Observatory is the world largest neutrino telescope, instrumenting one cubic kilometre of Antarctic ice at a depth between 1450m to 2450m.
M. Huber
semanticscholar +1 more source
TESOL Quarterly, Volume 58, Issue 1, Page 138-167, March 2024.Abstract This multisite qualitative case study explores ways in which instructional coaching focused on English language development (content) and teachers' individual beliefs (process) can help general education and dual language bilingual education elementary teachers work within and through perceived institutional barriers to improve their language ...
Jennifer Renn +4 more
wiley +1 more source