Results 141 to 150 of about 16,751 (259)
Fermi detected blazars seen by INTEGRAL [PDF]
, 2009 5 pages, 5 figures, 2009 Fermi Symposium, eConf Proceedings C091122International audienceMultiwavelength observations are essential to constrain physical parameters of the blazars observed by Fermi/LAT.
Soldi, S., Beckmann, V., Ricci, C.
core
Exploring γ-Ray Flares from High-Redshift Blazar B3 1343+451 at GeV Energies
UniverseWe study the temporal and spectral variability properties of the high-redshift blazar B3 1343+451 utilizing Fermi-LAT data from 2008 to 2022 in the energy range of 0.1–300 GeV.
Xiongfei Geng +8 more
doaj +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 +2 more
wiley +1 more source
Cluster analysis of the Roma-BZCAT blazars [PDF]
Based on the collected multiwavelength data, namely in the radio (NVSS, FIRST, RATAN-600), IR (WISE), optical (Pan-STARRS), UV (GALEX), and X-ray (ROSAT, Swift-XRT) ranges, we have performed a cluster analysis for the blazars of the Roma-BZCAT catalog ...
Mikhailov, A. G. +7 more
core +2 more sources
A Universal Physics Defining the Radiation Spectra of Blazars and Gamma-Ray Bursts
The Astrophysical JournalBlazars 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 +7 more
doaj +1 more source
Probes of the Inner Jets of Blazars [PDF]
, 1996 I review models for the 'inner jet" in blazars, the section that connects the central engine with the radio jet. I discuss how the structure and physics of the inner jet can he explored using millimeter-wave VLBI as well as multiwaveband observations of ...
Marscher, Alan P.
core +1 more source
The physical properties of candidate neutrino-emitter blazars [PDF]
EPJ Web of ConferencesHigh-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. +7 more
doaj +1 more source
Hunting Very High-energy-emitting (>100 GeV) High-synchrotron-peaked Blazars
The Astrophysical Journal Supplement SeriesVery high-energy (VHE; >100 GeV) γ -ray emission originates via some of the most extreme particle acceleration processes in the Universe. Considering beamed active galactic nuclei, i.e., blazars, only a small fraction, mainly high-synchrotron-peaked BL ...
Sushmita Agarwal, Vaidehi S. Paliya
doaj +1 more source
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
Which blazars are neutrino loud? [PDF]
, 2002 Protons accelerated in the cores of active galactic nuclei can effectively produce neutrinos only if the soft radiation background in the core is sufficiently high.
Neronov, A. Yu., Semikoz, D. V.
core