Results 91 to 100 of about 6,418 (210)

Patterns in the multi-wavelength behavior of candidate neutrino blazars [PDF]

, 2020
Motivated by the identification of the blazar TXS 0506+056 as the first promising high-energy neutrino counterpart candidate, we search for additional neutrino blazars candidates among the Fermi-LAT detected blazars.
Angioni, R., Stein, R., Garrappa, Simone, Shappee, B., Buson, S., Strotjohann, N. L., Kowalski, Marek, Kowalski, M., Max-Moerbeck Astudillo, Walter, Kiehlmann, S., Franckowiak, A., Stein, Robert, Max-Moerbeck, W., Paliya, V., Paliya, Vaidehi Sharan, Garrappa, S., Franckowiak, Anna   +16 more
core   +1 more source

A Universal Physics Defining the Radiation Spectra of Blazars and Gamma-Ray Bursts

The Astrophysical Journal
Blazars and gamma-ray bursts (GRBs) are both cosmic beacons of extreme energy release powered by relativistic jets. However, they originate from tremendously different environments. Blazars are the sustained powerhouses driven by supermassive black holes
Z. Lucas Uhm, Sang-Sung Lee, Bing Zhang, Judith Racusin, Bindu Rani, Myungshin Im, Aeree Chung, Hyung Mok Lee   +7 more
doaj   +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

Long‐term impacts of primary school scholarships: Evidence from Cambodia

Journal of Policy Analysis and Management, Volume 43, Issue 1, Page 10-38, Winter 2024.
ABSTRACT This randomized trial investigates the long‐term effects of a primary school scholarship program in rural Cambodia. We estimate impacts—9 years after program inception—on educational attainment, cognitive skills, socio‐emotional outcomes, labor market outcomes, and well‐being.
Felipe Barrera‐Osorio, Andreas de Barros, Deon Filmer   +2 more
wiley   +1 more source

Fermi-LAT Stacking Analysis Technique: An Application to Extreme Blazars and Prospects for their CTA Detection

, 2019
We present a likelihood profile stacking technique based on the Fermi-Large Area Telescope (LAT) data to explore the γ-ray characteristics of Fermi-LAT undetected astrophysical populations.
Paliya, Vaidehi, Ajello, Marco, Hartmann, D., Domínguez, A., Ajello, M., Paliya, Vaidehi Sharan, Domínguez Díaz, Alberto, Franckowiak, Anna, Hartmann, Dieter   +8 more
core   +1 more source

Polarization in Blazars [PDF]

Publications of the Astronomical Society of Japan, 2002
Based on the beaming model, a relation between the observed polarization and the Doppler factor was obtained by Fan et al. (1997, AAA068.159.190), who showed that the polarization is associated with the Doppler factor (boosting factor) in BL Lacertae objects (BLs).
openaire   +1 more source

The relation between black hole masses and Lorentz factors of the jet components in blazars

, 2009
We explore the relationship between black hole mass (M(BH)) and the motion of the jet components for a sample of blazars. The Very Long Baseline Array (VLBA) 2 cm Survey and its continuation: Monitoring of Jets in active galactic nuclei (AGNs) with VLBA ...
Cao, Xin-Wu, Zhou, Ming
core  

The physical properties of candidate neutrino-emitter blazars [PDF]

EPJ Web of Conferences
High-energy neutrinos detected by the IceCube Observatory provide a unique opportunity to study the origin of cosmic rays and the nature of the sources producing them.
Azzollini A., Buson S., Coleiro A., Fichet de Clairfontaine G., Pfeiffer L., Sanchez Zaballa J. M., Boughelilba M., Lincetto M.   +7 more
doaj   +1 more source

EGRET (GeV) Blazars

AIP Conference Proceedings, 2001
Invited review paper, to appear in the proceedings of the International Symposium on High Energy Gamma-Ray Astronomy, Heidelberg, June 2000, AIP Conference Proc.
openaire   +2 more sources

The Spectral Index Distribution of EGRET Blazars: Prospects for GLAST [PDF]

, 2007
International audienceWe present a maximum‐likelihood method of determining the intrinsic spectral index distribution (ISID) of a population of gamma‐ray emitters which accounts for error in measurement of individual spectral indices, and we apply it to ...
Venters, Tonia M., Pavlidou, Vasiliki, Vasiliki Pavlidou, Tonia M. Venters   +3 more
core   +1 more source