Results 91 to 100 of about 50,261 (220)

Quantitative Stain Mapping in X‐Ray Virtual Histology

Advanced Science, Volume 13, Issue 21, 13 April 2026.
Virtual histology promises 3D tissue examination without physical sectioning, yet has lacked the tissue‐specificity of conventional pathology. This work demonstrates the first quantitative three‐dimensional stain mapping at histologically relevant resolution, separating contrast agent from tissue to reveal cellular features such as nuclei. The approach
Dominik John, David M. Paganin, Marie‐Christine Zdora, Lisa Marie Petzold, Patrick Ilg, Junan Chen, Sara Baggio, Johannes B. Thalhammer, Sami Wirtensohn, Julian Moosmann, Jörg U. Hammel, Felix Beckmann, Samantha J. Alloo, Jannis N. Ahlers, Madleen Busse, Julia Herzen, Kaye S. Morgan   +16 more
wiley   +1 more source

Test for Echo: X-Ray Reflection Variability in the Seyfert-2 Active Galactic Nucleus NGC 4388

The Astrophysical Journal
We report on a study of the narrow Fe K α line and reflection spectrum in the well-known Seyfert-2 active galactic nucleus (AGN), NGC 4388. X-ray spectra summed from two extensive NICER monitoring campaigns, separated by years, show strong evidence of ...
Ben Gediman, Jon M. Miller, Abderahmen Zoghbi, Paul Draghis, Zaven Arzoumanian, W. N. Brandt, Keith Gendreau   +6 more
doaj   +1 more source

Simplified Assembly Process for Efficient Light‐Driven MOF‐Based Water Oxidation Catalysts in Acidic pH

ChemPhotoChem, Volume 10, Issue 4, April 2026.
MOF based photoanodes for light driven water oxidation can be created by combination of Fe3O nodes in MOFs such as MIL101 and highly active Ru‐based single site water oxidation catalyst. Even with linker mismatch the MOF assembles and shows stable performance in photoelectrochemical water oxidation.
Jully Patel, Hasan Tuncer, Gabriel Bury, Yulia Pushkar   +3 more
wiley   +1 more source

The hard X-ray view of bright infrared galaxies

, 2009
Aims. The synthesis of the cosmic X-ray background (CXB) requires a large population of Compton-thick active galactic nuclei that have not been detected so far.
Akylas, Armus, Barger, Bassani, Courvoisier, Dadina, de Rosa, Franceschini, Genzel, Gilli, Gondoin, González-Martín, Grimm, Guainazzi, Kawakatu, Kennicutt, La Franca, Lebrun, Lynden-Bell, Matt, Mushotzky, N. Cabral, Paltani, R. Walter, Risaliti, Risaliti, Sanders, Schmidt, Setti, Terashima, Tozzi, Tueller, Ubertini, Vega, Vignati, Walter, Watabe, Wilkes, Wilkes, Zdziarski   +39 more
core   +1 more source

On the Properties of X-Ray Corona in Seyfert 1 Galaxies

The Astrophysical Journal
We carried out a uniform and systematic analysis of a sample of 112 nearby bright Seyfert 1 type active galactic nuclei, the observations of which were carried out by the Nuclear Spectroscopic Telescope Array between 2013 August and 2022 May.
Indrani Pal, Anju A., H. Sreehari, Gitika Rameshan, C. S. Stalin, Claudio Ricci, S. Marchesi   +6 more
doaj   +1 more source

X-ray astronomical spectroscopy [PDF]

The current status of the X-ray spectroscopy of celestial X-ray sources, ranging from nearby stars to distant quasars, is reviewed. Particular emphasis is placed on the role of such spectroscopy as a useful and unique tool in the elucidation of the ...
Holt, S. S.
core   +1 more source

An Investigation of 5 yr Simultaneous X-Ray and Radio Light Curves of the Dwarf Seyfert Galaxy UGC 6728

The Astrophysical Journal
We present serendipitous simultaneous radio and X-ray light curves of the dwarf Seyfert galaxy UGC 6728 spanning 5 yr. The X-ray light curve exhibits a flaring period, followed by a gradual rise and decline.
Krista Lynne Smith, Macon Magno, Michael Koss   +2 more
doaj   +1 more source

X-ray variability observed with HEAO A-1 [PDF]

Results from the HEAO A-1 instrument which observed X-ray source variability over a wide range of accessible timescales are surveyed. The objects observed include quasars, BL Lacertae, and active galactic nuclei.
Friedman, H.
core   +1 more source

Force Multiplier Calculations for X-ray Binaries and Active Galactic Nuclei

, 2018
Motivated by the work done to explore the winds from hot stars (Lamers & Cassinelli 1999), we develop a method for self consistently calculating force multipliers for Type 1 and Type 2 active galactic nuclei (AGN), soft and hard start X-ray binaries ...
Dannen, Randall Cody
core   +1 more source

BASS. XLIX. Characterization of Highly Luminous and Obscured AGNs: Local X-Ray and [Ne V]λ3426 Emission in Comparison with the High-redshift Universe

The Astrophysical Journal
We present a detailed analysis of the most luminous and obscured active galactic nuclei (AGNs) detected in the ultra-hard X-ray band (14–195 kev) by the Swift/Burst Alert Telescope. Our sample comprises 21 X-ray luminous ( ${\mathrm{log}}\,{L}_{{\rm{X}}}/
Alessandro Peca, Michael J. Koss, Kyuseok Oh, Claudio Ricci, Benny Trakhtenbrot, Richard Mushotzky, Ezequiel Treister, C. Megan Urry, Andrealuna Pizzetti, Kohei Ichikawa, Alessia Tortosa, Federica Ricci, Matilde Signorini, Darshan Kakkad, Chin-Shin Chang, Giovanni Mazzolari, Turgay Caglar, Macon Magno, Ignacio del Moral-Castro, Peter G. Boorman, Tonima T. Ananna, Fiona Harrison, Daniel Stern, David Sanders   +23 more
doaj   +1 more source