Results 181 to 190 of about 7,225,990 (222)

Advanced X-Ray Observatories

Publications of the Astronomical Society of the Pacific, 1972
Since the discovery of the first X-ray sources in 1962 by the use of modest instruments flown on sounding rockets Giacconi et al. (1962), observations of cosmic X-rays have continued to provide a steady flow of information that has affected our view of virtually all astronomical phenomena.
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The Wide Field Imager of the International X-ray Observatory

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2010
The International X-ray Observatory (IXO) will be a joint X-ray observatory mission by ESA, NASA and JAXA. It will have a large effective area (3 m 2 at 1.25 keV) grazing incidence mirror system with good angular resolution (5 arcsec at 0.1–10 keV) and will feature a comprehensive suite of scientific instruments: an X-ray Microcalorimeter Spectrometer,
A. Stefanescu, M. W. Bautz, D. N. Burrows, BOMBELLI, LUCA, FIORINI, CARLO ETTORE, G. Fraser, K. Heinzinger, S. Herrmann, M. Kusterj, T. Lauf, P. Lechner, G. Lutz, P. Majewski, A. Meuris, S. S. Murray, M. Porro, R. Richter, A. Santangelo, G. Schaller, M. Schnecke, F. Schopper, H. Soltau, L. Struder, J. Treis, H. Tsunemi, G. deVita, J. Wilms   +26 more
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Enhancing the International X-ray Observatory

SPIE Proceedings, 2010
Over the last two years, we have studied system concepts for the International X-ray Observatory (IXO) with the goal of increasing the science return of the mission and to reduce technical and cost risk. We have developed an optical bench concept that has the potential to increase the focal length from 20 to 25 m within the current mass and stability
Rolf Danner, Dean Dailey, Charles Lillie, Connie Spittler   +3 more
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Data from the X-ray Observatory ROSAT

1995
On June Ist, 1990, the ROSAT observatory was launched successfully into a circular orbit of 575 km altitude and 53 degrees inclination. The satellite carries two telescope systems on-board: an X-ray telescope (XRT), operating in the energy range 0.1 to 2.4 keV, and a smaller XUV telescope (the ROSAT Wide Field Camera, WFC) sensitive in the range from ...
Zimmermann, H., Brunner, H., Pisarski, R., Voges, W., Watson, M.   +4 more
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The Lunar X-ray Observatory (LXO)

SPIE Proceedings, 2008
X-ray emission from charge exchange recombination between the highly ionized solar wind and neutral material i n Earth's magnetosheath has complicated x-ray observations of celestial objects with x-ray observatories including ROSAT, Chandra, XMM-Newton, and Suzaku. However, the charge-exchange emission can also be used as an important diagnostic of the
Porter, F. S., Collier, M., Hills, K., Sibeck, D. G., Snowden, S., Stubbs, T., Abbey, T. F., Bannister, N. P., Carter, J. A., Evans, M., Fraser, G. W., Read, A., Sembay, S., Cravens, T., Robertson, I. P., Galeazzi, M., Kuntz, K., Travnicek, P.   +17 more
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Observations of compact X-ray binaries with the Chandra X-ray Observatory

Advances in Space Research, 2006
Abstract The Chandra X-ray Observatory was launched on July 23, 1999. The first X-ray photons were detected on August 12 of that same year. Subsequently observations with the Observatory, which features sub-arcsecond angular resolution, have revolutionized our understanding of the X-ray emitting sky providing hosts of spectacular energy-resolved ...
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Ultraviolet and x-ray observatory in orbit

Physics Today, 1972
Copernicus, the most recent of NASA's Orbiting Astronomical Observatories, has been placed in orbit and is operating successfully. The ultraviolet and x-ray telescopes it carries are both reported to be in good order, and the pointing system that aims them for observation is operating at better than expected accuracy.
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A Focusing X-Ray Timing Observatory

AIP Conference Proceedings, 2004
The next generation X‐ray timing observatory will be a more powerful and versatile facility if it is based upon focusing optics rather than large area detectors. With X‐ray CCDs or active pixel detectors (or possibly even microcalorimeters) in the focal plane(s) the spectral resolution will be significantly superior to the RXTE PCA making it possible ...
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X-ray Observatory Takes to the Sky

Science, 1999
ASTRONOMYAfter a couple of decades, a couple billion dollars, and some deflected careers, U.S. x-ray astronomers finally have a telescope of their own: the Chandra X-ray Observatory, which last week rode the Space Shuttle into space. Planning for Chandra began when the last American x-ray telescope, called Einstein, was launched in 1978; and by the ...
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X-ray observations and analysis with the Chandra X-ray observatory (abstract)

Review of Scientific Instruments, 2001
The Chandra X-ray telescope has four separate detectors, two charge coupled devices, and two microchannel plates, behind a set of four highly polished, nested mirrors. The on-orbit performance of the imaging system is <1 arcsec, a dramatic improvement from the 5–8 arcsec previously available.
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