Results 61 to 70 of about 225,473 (202)

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

V751 Cyg and V Sge as transient supersoft X-ray sources

, 1999
I review the observational evidence for luminous, soft X-ray emission during optical low-states in the two cataclysmic variables V751 Cyg and V Sge, and discuss the possible link to the canonical supersoft X-ray sources.Comment: 6 pages with newarcrc.sty;
Greiner, J.
core   +2 more sources

Measuring Optical Scattering in Relation to Coatings on Crystalline X-Ray Scintillator Screens

Crystals
Scattered light makes up a significant amount of recorded intensities during tomographic imaging, thereby leading to severe misinterpretation and artifacts in the reconstructed volume images.
Matthias Diez, Simon Zabler
doaj   +1 more source

X-ray astronomical spectroscopy [PDF]

The contributions of the Goddard group to the history of X-ray astronomy are numerous and varied. One role that the group has continued to play involves the pursuit of techniques for the measurement and interpretation of the X-ray spectra of cosmic ...
Holt, Stephen S.
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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
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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

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

X- and Gamma-ray astrophysics in the era of Multi-messenger astronomy [PDF]

, 2022
G. Stratta, A. Santangelo
openalex   +1 more source

Exploring X-Ray Properties of Low-metallicity Dwarf Galaxies

The Astrophysical Journal
One of the primary outstanding questions in extragalactic astronomy is the formation and early evolution of the supermassive black holes that are seen in nearly every massive galaxy.
Jenna M. Cann, Kimberly A. Weaver, Ryan W. Pfeifle, Nathan J. Secrest, Shobita Satyapal, Mario Gliozzi   +5 more
doaj   +1 more source

Nitrogen Limitations on Microbial Degradation of Plant Substrates Are Controlled by Soil Structure and Moisture Content

Frontiers in Microbiology, 2018
Mineral nitrogen (N) availability to heterotrophic micro-organisms is known to impact organic matter (OM) decomposition. Different pathways determining the N accessibility depend to a large extent on soil structure.
Peter Maenhout, Jan Van den Bulcke, Luc Van Hoorebeke, Veerle Cnudde, Stefaan De Neve, Steven Sleutel   +5 more
doaj   +1 more source