Results 191 to 200 of about 33,870 (293)

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

Universe
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, Tingfeng Yi, Yanke Tang, Junjie Wang, Shun Zhang, Liang Wang, Yutong Chen, Yuncai Shen, Liang Dong, Yangwei Zhang   +9 more
doaj   +1 more source

Multi-Epoch VLBA Observations of γ-Ray Bright Blazars [PDF]

, 1998
S. G. Marchenko, Alan P. Marscher, J. R. Mattox, A. E. Wehrle, W. Xu   +4 more
openalex   +1 more source

VLBI Analysis of a Potential High-Energy Neutrino Emitter Blazar

Universe
Recent studies suggest that high-energy neutrinos can be produced in the jets of blazars, radio-loud active galactic nuclei (AGN) with jets pointing close to the line of sight.
Janka Kőmíves, Krisztina Éva Gabányi, Sándor Frey, Emma Kun   +3 more
doaj   +1 more source

The Radio-Gamma-Ray Connection: the Radio Properties of Gamma-Ray-Bright Blazars [PDF]

, 1996
M. F. Aller, H. D. Aller, P. A. Hughes
openalex   +1 more source

The Colorado IUE active galaxy survey. I - Blazars

, 1992
Rick Edelson, G. Pike, Jon M. Saken, Anne L. Kinney, J. Michael Shull   +4 more
openalex   +1 more source

The Blazar Paradigm: Synchro-Compton Emission from Relativistic Jets [PDF]

, 1998
Alan P. Marscher
openalex   +1 more source

Central Engine and Spectral Energy Distribution Properties of High Redshift Gamma Ray Blazars

Galaxies
We report on the properties of central engines in the γ-ray blazars located at high redshifts beyond z > 0.4, where the extra-galactic background light (EBL) starts affecting their γ-ray spectra.
Anilkumar Tolamatti, Krishna Kumar Singh, Kuldeep Kumar Yadav   +2 more
doaj   +1 more source

Synergies of THESEUS with the large facilities of the 2030s and guest observer opportunities. [PDF]

Exp Astron (Dordr), 2021
Rosati P, Basa S, Blain AW, Bozzo E, Branchesi M, Christensen L, Ferrara A, Gomboc A, O'Brien PT, Osborne JP, Rossi A, Schüssler F, Spurio M, Stergioulas N, Stratta G, Amati L, Casewell S, Ciolfi R, Ghirlanda G, Grimm S, Guetta D, Harms J, Le Floc'h E, Longo F, Maggiore M, Mereghetti S, Oganesyan G, Salvaterra R, Tanvir NR, Turriziani S, Vergani SD, Balman S, Caruana J, Erkut MH, Guidorzi G, Frontera F, Martin-Carrillo A, Paltani S, Porquet D, Sergijenko O.   +39 more
europepmc   +1 more source

Evolving parsec-scale radio structure in the most distant blazar known. [PDF]

Nat Commun, 2020
An T, Mohan P, Zhang Y, Frey S, Yang J, Gabányi KÉ, Gurvits LI, Paragi Z, Perger K, Zheng Z.   +9 more
europepmc   +1 more source

Blazars: Clues to Jet Physics [PDF]

, 1999
R. M. Sambruna
openalex   +1 more source