Results 121 to 130 of about 1,919 (235)

Multiwavelength Polarization Observations of Mrk 501

open access: yesThe Astrophysical Journal Letters
Mrk 501 is a prototypical high-synchrotron-peaked blazar and serves as one of the primary targets for the Imaging X-ray Polarimetry Explorer (IXPE). In this study, we report X-ray polarization measurements of Mrk 501 based on six IXPE observations.
Xin-Ke Hu   +20 more
doaj   +1 more source

A Deeper Look into eFEDS AGN Candidates in Dwarf Galaxies with Chandra

open access: yesThe Astrophysical Journal
The ability to accurately discern active massive black holes (BHs) in nearby dwarf galaxies is paramount to understanding the origins and processes of “seed” BHs in the early Universe.
Adonis A. Sanchez   +3 more
doaj   +1 more source

Hard X-ray variability of three active galactic nuclei

open access: bronze, 1984
P. Ubertini   +4 more
openalex   +1 more source

Obscured active galactic nuclei from the ELAIS Deep X-ray Survey [PDF]

open access: bronze, 2003
Chris J. Willott   +15 more
openalex   +1 more source

NuSTAR Observation of the TeV-detected Radio Galaxy 3C 264: Core Emission and the Hot Accretion Flow Contribution

open access: yesThe Astrophysical Journal
3C 264 is one of the few FRI radio galaxies with detected TeV emission. It is a low-luminosity active galactic nucleus (LLAGN) and is generally associated with a radiatively inefficient accretion flow (RIAF).
Ka-Wah Wong   +6 more
doaj   +1 more source

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