Results 111 to 120 of about 34,519 (239)

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

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

Chasing the Neutrino Blazar Candidates

The Astrophysical Journal Supplement Series
In 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, Haitao Cao, Hubing Xiao, Zhiyuan Pei, JunHui Fan, Denis Bastieri   +5 more
doaj   +1 more source

Optical Intraday Variability Studies of Ten Low Energy Peaked Blazars

, 2011
We have carried out optical (R band) intraday variability (IDV) monitoring of a sample of ten bright low energy peaked blazars (LBLs). Forty photometric observations, of an average of ~ 4 hours each, were made between 2008 September and 2009 June using ...
Abraham, Aller, Alok C. Gupta, Angione, Bindu Rani, Blandford, Blandford, Böttcher, Böttcher, Camenzind, Carswell, Chakrabarti, Ciprini, Ciprini, Clements, Cohen, Corso, Corso, Dai, Dai, de Diego, Edelson, Efimov, Elvis, Emmanoulopoulos, Falomo, Fan, Fan, Fan, Fan, Fan, Fan, Fiorucci, Foschini, Fossati, Ghisellini, Ghisellini, Ghosh, Ghosh, Gopal-Krishna, Gu, Gupta, Gupta, Gupta, Gupta, Gupta, Gupta, Hamuy, Heidt, Hovatta, Hufnagel, Hughes, Impey, Krawczynski, Lanzetta, Lichti, Liller, Lu, Mangalam, Marscher, Marscher, Marscher, Massaro, Mead, Miller, Moles, Montagni, Nieppola, Nieppola, Nilsson, Nilsson, Ostorero, Paul J. Wiita, Pollock, Qian, Raiteri, Raiteri, Raiteri, Raiteri, Raiteri, Raiteri, Rani, Rani, Rani, Rickett, Romero, S. Ganesh, Sbarufatti, Schmidt, Shen, Sikora, Sillanpää, Sillanpää, Sillanpää, Sillanpää, Simonetti, Sitko, Sitko, Smith, Smith, Spinrad, Stetson, Stetson, Striani, Takalo, Takalo, Takalo, Takalo, Takalo, Teräsranta, Tommasi, U. C. Joshi, Urry, Valtaoja, Valtaoja, Valtaoja, Valtonen, Villata, Villata, Villata, Villata, Villata, Villata, Wagner, Wagner, Webb, Webb, Webb, Wills, Wu, Xie, Xie, Xie, Xie, Xie, Zhang   +135 more
core   +1 more source

Evaluating quasi-periodic variations in the γ-ray light curves of Fermi-LAT blazars [PDF]

Astronomy & Astrophysics, 2019
Context. The detection of periodicities in the light curves of active galactic nuclei (AGNs) could have profound consequences for our understanding of the nature and radiation physics of these objects.
F. A. Benkhali, W. Hofmann, F. Rieger, N. C. M. F. Kernphysik, H Germany, Zah, I. F. Astrophysik, U. Heidelberg, Data Assimilation Research Centre, U. Reading, United Kingdom.   +10 more
semanticscholar   +1 more source

Source Count Distribution of Fermi LAT Gamma-Ray Blazars Using Novel Nonparametric Methods

Universe
We 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

X-Ray Studies of Blazar 1ES 1959+650 Using Swift and XMM-Newton Satellite [PDF]

, 2023
Kiran Wani, Haritma Gaur, M. K. Patil
openalex   +1 more source

Recognizing Blazars Using Radio Morphology from the VLA Sky Survey

The Astrophysical Journal
Blazars 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, Eduardo Bañados, Silvia Belladitta, Chiara Mazzucchelli, Jan-Torge Schindler, Frederick Davies, Bram P. Venemans   +6 more
doaj   +1 more source

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

Astrophysical Journal, 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.
V. Paliya, A. Domínguez, M. Ajello, A. Franckowiak, Dieter H. Hartmann   +4 more
semanticscholar   +1 more source

Spectral Properties of Fermi Blazars and their Unification Schemes

Open Astronomy, 2020
We use the distributions of spectral indices (αv ) of a large homogenous sample of Fermi-detected blazars to re-investigate the relationship between flat spectrum radio quasars (FSRQs) and subclasses of BL Lac objects (BL Lacs).
Iyida Evaristus U., Odo Finbarr C., Chukwude Augustine E., Ubachukwu Augustine A.   +3 more
doaj   +1 more source