Results 151 to 160 of about 50,755 (263)

Signature of a Seyfert-like Component in Blazar 3C 273 and Its Reflection-based Explanation

open access: yesThe Astrophysical Journal
We present the results of blazar 3C 273 from simultaneous observations obtained using the XMM-Newton and NuSTAR satellites during the period 2015–2019 in five epochs. When the spectra are modeled with a power law, significant residuals arise below ∼2 keV
Haritma Gaur   +6 more
doaj   +1 more source

Host Galaxies of Hard X-ray Selected Type-2 Active Galactic Nuclei at Intermediate Redshifts [PDF]

open access: green, 2006
Gaku Kiuchi   +4 more
openalex   +2 more sources

New Active Galactic Nuclei Detected by the ART-XС and eROSITA Telescopes during the First Five SRG All-Sky X-ray Surveys [PDF]

open access: green, 2023
G. S. Uskov   +10 more
openalex   +1 more source

Active galactic nuclei and X-ray observations [PDF]

open access: yesJournal of Physical Studies, 2016
A. A. Vasylenko   +2 more
openaire   +1 more source

BASS. XLVIII. [Ne V] λ3427 Emission in Powerful Nearby Active Galactic Nuclei

open access: yesThe Astrophysical Journal
We investigate the high-ionization, narrow [Ne V ] λ 3427 line emission in a sample of over 340 ultrahard X-ray (14–195 keV) selected active galactic nuclei (AGN) drawn from the BAT AGN Spectroscopic Survey project.
Tomer Reiss   +16 more
doaj   +1 more source

EX56a study of extended X-ray emission around isolated galaxies EX56b identification and spectra of bright X-ray sources at high galactic latitude [PDF]

open access: yes
The EXOSAT observations confirmed the identification and extended nature of PKS 2345-35. It gave a good 2 to 10 keV X-ray spectrum and a detailed spatial profile indicating asymmetry of the structure.
Schwartz, Daniel A.
core   +1 more source

X-Ray Constraints on Wandering Black Holes in Stripped Galaxy Nuclei in the Halo of NGC 5128

open access: yesThe Astrophysical Journal
A subset of galaxies have dense nuclei, and when these galaxies are accreted and tidally stripped, the nuclei can masquerade as globular clusters in the halos of large galaxies.
Samuel L. Feyan   +8 more
doaj   +1 more source

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