Results 221 to 230 of about 50,208 (269)

A decade of sub-arcsecond imaging with the International LOFAR Telescope. [PDF]

open access: yesAstrophys Space Sci
Morabito LK   +9 more
europepmc   +1 more source

THE NuSTAR EXTRAGALACTIC SURVEYS: The NUMBER COUNTS of ACTIVE GALACTIC NUCLEI and the RESOLVED FRACTION of the COSMIC X-RAY BACKGROUND

open access: green, 2016
Fiona A. Harrison   +43 more
openalex   +2 more sources

A small and vigorous black hole in the early Universe. [PDF]

open access: yesNature
Maiolino R   +38 more
europepmc   +1 more source

Gaussian Process Modeling Coronal X-Ray Variability of Active Galactic Nuclei

open access: gold
Haiyun 海云 Zhang 张   +3 more
openalex   +1 more source

Micromegas with GEM preamplification for enhanced energy threshold in low-background gaseous time projection chambers. [PDF]

open access: yesOpen Res Eur
Castel Pablo JF   +15 more
europepmc   +1 more source

BASS. LII. The Prevalence of Double-peaked Broad Lines at Low Accretion Rates among Hard X-Ray Selected Active Galactic Nuclei

open access: gold
Charlotte Ward   +20 more
openalex   +1 more source

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