Results 101 to 110 of about 34,519 (239)

Radiative Transfer Modeling of Radio-Band Linear Polarization Observations as a Probe of the Physical Conditions in the Jets of γ-Ray Flaring Blazars

Galaxies, 2016
Since the mid-1980s, the shock-in-jet model has been the preferred paradigm to explain radio-band flaring in blazar jets. We describe our radiative transfer model incorporating relativistically-propagating shocks, and illustrate how the 4.8, 8, and 14.5 ...
Margo F. Aller, Philip A. Hughes, Hugh D. Aller, Talvikki Hovatta, Venkatessh Ramakrishnan   +4 more
doaj   +1 more source

Implications on the blazar sequence and inverse Compton models from Fermi bright blazars

, 2011
In this paper, we use the quasi-simultaneous spectra of Fermi bright blazars and Fermi detected narrow line Seyfert 1 (NLS1) to study the blazar sequence and inverse Compton (IC) models. I.
Abdo, Abdo, Abdo, Abdo, Abdo, Abdo, Barth, Blandford, Błażejowski, Chen, Coppi, Dermer, Falomo, Fan, Fan, Georganopoulos, Ghisellini, Ghisellini, Hartman, Huang, J. M. Bai, Liang Chen, Liu, Scarpa, Sikora, Sikora, Tavecchio, Wang, Woo, Xie, Xie, Xu, Yuan   +32 more
core   +1 more source

BAT AGN Spectroscopic Survey. XVI. General Physical Characteristics of BAT Blazars [PDF]

Astrophysical Journal, 2019
The recently released 105-month Swift-Burst Alert Telescope (BAT) all-sky hard X-ray survey catalog presents an opportunity to study astrophysical objects detected in the deepest look at the entire hard X-ray (14–195 keV) sky.
V. Paliya, M. Koss, B. Trakhtenbrot, C. Ricci, C. Ricci, K. Oh, M. Ajello, D. Stern, M. Powell, C. M. Urry, F. Harrison, I. Lamperti, R. Mushotzky, L. Marcotulli, J. Mejía-restrepo, D. Hartmann   +15 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, Pedro L. Luque‐Escamilla, Benito Marcote, Daniel del Ser, Gustavo E. Romero, Cintia S. Peri   +5 more
wiley   +1 more source

GeV Variability Properties of TeV Blazars Detected by Fermi-LAT

The Astrophysical Journal Supplement Series
Variability is a prominent observational feature of blazars. The high-energy radiation mechanism of jets has always been important but is still unclear.
Gege Wang, Hubing Xiao, Junhui Fan, Xin Zhang   +3 more
doaj   +1 more source

The Extremes in Intra-Night Blazar Variability: The S4 0954+65 Case

Galaxies, 2016
We present results of optical observations of the extremely violently variable blazar S4 0954+65 on intra-night time scales. The object showed flux changes of up to 100% within a few hours.
Rumen Bachev, Anton Strigachev, Evgeni Semkov, Rosa Victoria Muñoz Dimitrova, Georgi Latev, Borislav Spassov, Blagovest Petrov   +6 more
doaj   +1 more source

Multiwavelength Variability Power Spectrum Analysis of the Blazars 3C 279 and PKS 1510–089 on Multiple Timescales [PDF]

, 2022
A. Goyal, M. Soida, Ł. Stawarz, Paul J. Wiita, K. Nilsson, Svetlana G. Jorstad, Alan P. Marscher, M. F. Aller, H. D. Aller, A. Lähteenmäki, T. Hovatta, S. Zoła, Krzysztof Nalewajko, M. Tornikoski, J. Tammi, Mark Hodges, S. Kiehlmann, A. C. S. Readhead, W. Max-Moerbeck, E. Lindfors, V. Fallah Ramazanı, D. Reichart, D. B. Caton, Janeth Valverde, D. Horan, Roopesh Ojha, P. van Zyl   +26 more
openalex   +1 more source

THE SPECTRAL ENERGY DISTRIBUTIONS OF FERMI BLAZARS [PDF]

, 2016
In this paper, multiwavelength data are compiled for a sample of 1425 Fermi blazars to calculate their spectral energy distributions (SEDs). A parabolic function, is used for SED fitting. Synchrotron peak frequency ( ), spectral curvature (P1), peak flux
Jun-Hui Fan, Jianghe Yang, Yi Liu, G. Luo, Chao Lin, Yu-hai Yuan, H. Xiao, A. Zhou, T. Hua, Z. Pei   +9 more
semanticscholar   +1 more source

Open Universe for Blazars: a new generation of astronomical products based on 14 years ofSwift-XRT data [PDF]

Astronomy & Astrophysics, 2019
Aims.Open Universe for Blazars is a set of high-transparency multi-frequency data products for blazar science, and the tools designed to generate them.
P. Giommi, Carlos H. Brandt, U. D. Almeida, A. M. T. Pollock, F. Arneodo, Y. L. Chang, O. Civitarese, M. D. Angelis, V. D’Elia, J. D. R. Vera, S. D. Pippo, R. Middei, A. Penacchioni, M. Perri, Remo Ruffini, N. Sahakyan, S. Turriziani   +16 more
semanticscholar   +1 more source

Making “Small Waves of Change”: Dual Language and General Education Teacher Transformation through Instructional Coaching

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, Haiyan Li, Woongsik Choi, Wayne Wright, Trish Morita‐Mullaney   +4 more
wiley   +1 more source