The detection of high-redshift (z > 3) blazars enables the study of the evolution of the most luminous relativistic jets over cosmic time. More importantly, high-redshift blazars tend to host massive black holes and can be used to constrain the space density of heavy black holes in the early universe. Here, we report the first detection with the Fermi-Large Area Telescope of five γ-ray-emitting blazars beyond z = 3.1, more distant than any blazars previously detected in γ-rays. Among these five objects, NVSS J151002+570243 is now the most distant known γ-ray-emitting blazar at z = 4.31. These objects have steeply falling γ-ray spectral energy distributions (SEDs), and those that have been observed in X-rays have a very hard X-ray spe...
The uncharted territory of the high-redshift (z ≳ 3) universe holds the key to understanding the evo...
Blazars are an extreme class of active galactic nuclei (AGN) whose bright and violently variable pan...
The Fermi and Swift satellites, together with ground based Cherenkov telescopes, has greatly improve...
International audienceThe detection of high-redshift ($z\,\gt 3$) blazars enables the study of the e...
The detection of high-redshift ($z\,\gt 3$) blazars enables the study of the evolution of the most l...
International audienceThe detection of high-redshift ($z\,\gt 3$) blazars enables the study of the e...
International audienceThe detection of high-redshift ($z\,\gt 3$) blazars enables the study of the e...
International audienceThe detection of high-redshift ($z\,\gt 3$) blazars enables the study of the e...
International audienceThe detection of high-redshift ($z\,\gt 3$) blazars enables the study of the e...
International audienceThe detection of high-redshift ($z\,\gt 3$) blazars enables the study of the e...
International audienceThe detection of high-redshift ($z\,\gt 3$) blazars enables the study of the e...
The detection of high-redshift ($z\,\gt 3$) blazars enables the study of the evolution of the most l...
The detection of high-redshift (z > 3) blazars enables the study of the evolution of the most lumino...
International audienceThe uncharted territory of the high-redshift (z ≳ 3) universe holds the key to...
The uncharted territory of the high-redshift (z ≳ 3) universe holds the key to understanding the evo...
The uncharted territory of the high-redshift (z ≳ 3) universe holds the key to understanding the evo...
Blazars are an extreme class of active galactic nuclei (AGN) whose bright and violently variable pan...
The Fermi and Swift satellites, together with ground based Cherenkov telescopes, has greatly improve...
International audienceThe detection of high-redshift ($z\,\gt 3$) blazars enables the study of the e...
The detection of high-redshift ($z\,\gt 3$) blazars enables the study of the evolution of the most l...
International audienceThe detection of high-redshift ($z\,\gt 3$) blazars enables the study of the e...
International audienceThe detection of high-redshift ($z\,\gt 3$) blazars enables the study of the e...
International audienceThe detection of high-redshift ($z\,\gt 3$) blazars enables the study of the e...
International audienceThe detection of high-redshift ($z\,\gt 3$) blazars enables the study of the e...
International audienceThe detection of high-redshift ($z\,\gt 3$) blazars enables the study of the e...
International audienceThe detection of high-redshift ($z\,\gt 3$) blazars enables the study of the e...
The detection of high-redshift ($z\,\gt 3$) blazars enables the study of the evolution of the most l...
The detection of high-redshift (z > 3) blazars enables the study of the evolution of the most lumino...
International audienceThe uncharted territory of the high-redshift (z ≳ 3) universe holds the key to...
The uncharted territory of the high-redshift (z ≳ 3) universe holds the key to understanding the evo...
The uncharted territory of the high-redshift (z ≳ 3) universe holds the key to understanding the evo...
Blazars are an extreme class of active galactic nuclei (AGN) whose bright and violently variable pan...
The Fermi and Swift satellites, together with ground based Cherenkov telescopes, has greatly improve...