Results 111 to 120 of about 18,989 (273)
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
Chasing the Neutrino Blazar Candidates
The Astrophysical Journal Supplement SeriesIn our study of the correlations between IceCube-detected neutrino events and γ -ray properties of blazars, we recognize the inherent challenges posed by the limited detection of neutrinos.
Jingtian Zhu +5 more
doaj +1 more source
The RoboPol Program: Optical Polarimetric Monitoring of Blazars
Galaxies, 2019 After three years of polarimetric monitoring of blazars, the RoboPol project has uncovered several key characteristics of polarimetric rotations in the optical for these most variable sources.
Dmitry Blinov, Vasiliki Pavlidou
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
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
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
Recognizing Blazars Using Radio Morphology from the VLA Sky Survey
The Astrophysical JournalBlazars are radio-loud active galactic nuclei whose jets have a very small angle to our line of sight. Observationally, the radio emissions are mostly compact or compact-core with a one-sided jet.
Zhang-Liang Xie +6 more
doaj +1 more source
Source Count Distribution of Fermi LAT Gamma-Ray Blazars Using Novel Nonparametric Methods
UniverseWe utilized a sample from the Fermi-LAT 14-year Source Catalog by adjusting the flux detection threshold, enabling us to derive the intrinsic source count distribution dN/dF25 of extragalactic blazars using nonparametric, unbinned methods developed by ...
Xuhang Yin, Houdun Zeng
doaj +1 more source