Results 101 to 110 of about 2,148,167 (385)

The fabrication of replicated optics for hard x-ray astronomy [PDF]

, 2000
Chet O. Speegle, Brian D. Ramsey, Darell Engelhaupt   +2 more
openalex   +1 more source

A program of X-ray astronomy from sounding rocket Final report [PDF]

X-ray astronomy from sounding ...
Giacconi, R., Gorenstein, P., Gursky, H., Waters, J. R.   +3 more
core   +1 more source

X-ray Astronomy in the Laboratory with a Miniature Compact Object Produced by Laser-Driven Implosion

, 2009
Laboratory spectroscopy of non-thermal equilibrium plasmas photoionized by intense radiation is a key to understanding compact objects, such as black holes, based on astronomical observations.
A Bar-Shalom, A Ng, A H Gabriel, B A Remington, B A Remington, C Rousseaux, C Yamanaka, C B Tarter, David Salzmann, D A Liedahl, D A Liedahl, D E Osterbrock, D R Ballantyne, F Paerels, F Wang, Feilu Wang, G Goldstein, Gang Zhao, G J Ferland, Hideaki Takabe, Hiroaki Nishimura, H K Chung, J Nuckolls, Jae-Min Han, Jie Zhang, Kunioki Mima, M Allen, Minoru Tanabe, M E Foord, Norimasa Yamamoto, N I Shakura, N S Schulz, Quanli Dong, R Giacconi, S Fujioka, S Watanabe, Shinsuke Fujioka, Shoujun Wang, S J Rose, S J Rose, Takashi Fujiwara, T R Kallman, Yi Zhang, Yong-Joo Rhee, Yong-Woo Lee, Yuto Nakabayashi, Yutong Li   +46 more
core   +1 more source

Designing Defect Structure and Interfacial Strain in an Epitaxial VN Bilayer Film by Tailoring N Concentration

Advanced Materials Interfaces, EarlyView.
The N concentration in an epitaxial VN bilayer is tailored from overstoichiometric V0.49N0.51 to understoichiometric V0.56N0.44. Based on ab initio, diffraction, and microscopy data, the overstoichiometric V0.49N0.51 layer contains V vacancies, N Frenkel pairs, and a high density of dislocations.
Marcus Hans, Damian M. Holzapfel, Zhuo Chen, Soheil Karimi Aghda, Michal Fečík, Daniel Primetzhofer, Zaoli Zhang, Jochen M. Schneider   +7 more
wiley   +1 more source

The 157 Month Swift/BAT All-sky Hard X-Ray Survey

The Astrophysical Journal
The Burst Alert Telescope (BAT) on board the Neil Gehrels Swift Observatory has been serving as a survey instrument for the hard X-ray sky, and has detected thousands of X-ray sources (e.g., active galactic nuclei, X-ray binaries, etc).
Amy Y. Lien, Hans A. Krimm, Craig B. Markwardt, Kyuseok Oh, Lea Marcotulli, Richard Mushotzky, Nicholas R. Collins, Scott D. Barthelmy, Wayne H. Baumgartner, S. Bradley Cenko, Michael Koss, Sibasish Laha, Takanori Sakamoto, David M. Palmer, Tyler Parsotan   +14 more
doaj   +1 more source

AXAF: The Advanced X-ray Astrophysics Facility [PDF]

The Advanced X-ray Astrophysics Facility (AXAF) will be the X-ray astronomy component of U.S. space exploration via Great Observatories (mostly orbital) for the remainder of the century.

core   +1 more source

A Dual‐Emissive DNA‐Templated Silver Nanocluster with Near‐Infrared I and II Emission

Advanced Optical Materials, Volume 13, Issue 8, March 13, 2025.
This study presents a dual‐emissive DNA‐stabilized silver nanocluster with a nanosecond‐lived NIR‐I emission band and a microsecond‐lived NIR‐II emission band. Mass spectrometry establishes that the nanocluster has molecular formula (DNA)2[Ag17]11+. DNA sequence variations reveal critical nucleobases for stabilization, and modifications at the DNA 5 ...
Anna Gonzàlez‐Rosell, Vanessa Rück, Mikkel B. Liisberg, Cecilia Cerretani, Villads R. M. Nielsen, Tom Vosch, Stacy M. Copp   +6 more
wiley   +1 more source

Metal‐Mediated Nitrogen Doping of Carbon Supports Boosts Hydrogen Production from Ammonia

Angewandte Chemie, EarlyView.
A virtuous catalytic cycle is established as the carbon support simultaneously tunes electron density and stores atomic nitrogen formed via Ru–N species during ammonia decomposition, resulting in self‐enhancing catalysis. Abstract Ammonia is an attractive hydrogen carrier, yet its practical use is limited by the need for efficient catalytic ...
Thomas J. Liddy, Benjamin J. Young, Emerson C. Kohlrausch, Andreas Weilhard, Gazi N. Aliev, Yifan Chen, Manfred E. Schuster, Mohsen Danaie, Luke L. Keenan, Donato Decarolis, Diego Gianolio, Siqi Wang, Mingming Zhu, Graham J. Hutchings, David M. Grant, Wolfgang Theis, Tien‐Lin Lee, David A. Duncan, Alberto Roldan, Andrei N. Khlobystov, Jesum Alves Fernandes   +20 more
wiley   +2 more sources

Use of the maximum entropy method in X-ray astronomy [PDF]

, 1981
R. Willingale
openalex   +1 more source

Phase Topology Stability of an Optical Vortex via an Electrically Controlled Twist‐Planar Oriented Liquid Crystal Fresnel Lens

Advanced Optical Materials, EarlyView.
A simple and efficient method for determining the stability of optical vortices via Fourier transform using a conventional spherical lens is presented. The theoretical and experimental results demonstrate a practical approach to directly and unambiguously measure the magnitude and sign of the topological charge of a beam without altering an ...
Elena Melnikova, Katsiaryna Pantsialeyeva, Dmitry Gorbach, Alexei Tolstik, Sergei Slussarenko Jr., Alina Karabchevsky   +5 more
wiley   +1 more source