Results 291 to 300 of about 2,093,256 (347)

Spectral Slicing X-Ray Telescope

Optical Engineering, 1986
Layered synthetic microstructure (LSM) X-ray optics is investigated as a system for coupling a conventional glancing incidence X-ray mirror to a high sensitivity X-ray detector. It is shown that, by the use of figured LSM optics, it is possible to magnify the X-ray image produced by the primary mirrors so as to maintain their high inherent spatial ...
Richard B. Hoover, David L. Shealy, Shao-Hua Chao   +2 more
openaire   +1 more source

X-ray Telescopes

1996
The spectra of stars, even for early-type (hot) stars, fall off steeply in the ultraviolet. The falloff is roughly according to the Wien radiation law that prevails on the short-wavelength side of the black-body radiation peak. Nevertheless, there has been considerable interest in the ultraviolet because many spectral features pertaining to ionized ...
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Swift x-ray telescope (XRT)

SPIE Proceedings, 2003
The Swift Gamma-Ray Burst Explorer will be launched late in 2003 to make prompt multiwavelength observations of Gamma-Ray Bursts and Afterglows. The X-ray Telescope (XRT) provides key capabilities that permit Swift to determine GRB positions with several arcsecond accuracy within 100 seconds of the burst onset.
David N. Burrows, Joanne E. Hill, John A. Nousek, Alan A. Wells, Alexander T. Short, Richard M. Ambrosi, Guido Chincarini, Oberto Citterio, G. Tagliaferri   +8 more
openaire   +1 more source

New x-ray telescope design

SPIE Proceedings, 2003
The Solar X-ray Imager (SXI) is a complimentary, add-on instrument designed for use on the next generation of Geostationary Orbiting Environmental Satellites (GOES). Its primary mission is to continuously observe the full solar disc at X-ray wavelengths; including coronal holes, active regions, flares, and coronal mass ejections. For wide-field imaging
Atanassova, Martina, Harvey, James E.
openaire   +2 more sources

Hadamard X-ray Spectro-telescope

Advances in Space Research, 1982
Abstract The Hadamard X-ray Spectro-telescope consists of a flat Bragg crystal, an Hadamard mask and an imaging proportional counter. We have achieved α⧸▵α≈50, which is limited by the position resolution of the detector. This telescope is useful to observe the spectral structure of extended X-ray sources.
H. Tsunemi, S. Kitamoto, S. Miyamoto, H. Murai, S. Shimizu   +4 more
openaire   +1 more source

NeXT hard x-ray telescope

SPIE Proceedings, 2004
NeXT is Japan's 6th X-ray astronomical observatory following to ASTRO-E2. The launch is currently scheduled in 2010. One of the main goal of NeXT is to explore the hard X-ray Universe with newly developed hard X-ray telescope. The hard X-ray telescope utilizes multilayer-supermirror and high-throughput thin-foil optics technology.
Yasushi Ogasaka, Keisuke Tamura, Ryo Shibata, Akihiro Furuzawa, Takashi Okajima, Koujun Yamashita, Yuzuru Tawara, Hideyo Kunieda   +7 more
openaire   +1 more source

Observations of X-Ray Jets with the Yohkoh Soft X-Ray Telescope

Nippon Tenmon Gakkai obun kenkyu hokoku, 1992
Time series of Soft X-ray Telescope images have revealed many X-ray jets in the solar corona. The typical size of a jet is 5 × 103–4 × 105 km, the translational velocity is 30–300 km s−1, and the corresponding kinetic energy is estimated to be 1025 ...
K. Shibata, Y. Ishido, L. Acton, K. Strong, Tadashi Hirayama, Y. Uchida, A. Mcallister, R. Matsumoto, S. Tsuneta, T. Shimizu, H. Hara, T. Sakurai, K. Ichimoto, Y. Nishino, Y. Ogawara   +14 more
semanticscholar   +1 more source

Goldhelox: A Soft X-Ray Solar Telescope

Journal of X-Ray Science and Technology, 1995
The Goldhelox Project is the construction and use of a near-normal incidence soft x-ray robotic solar telescope by undergraduate students at Brigham Young University. Once it is completed and tested, it will be deployed from a Get-Away-Special (GAS) canister in the bay of a space shuttle.
D S, Durfee, J W, Moody, K D, Brady, C, Brown, B, Campbell, M K, Durfee, D, Early, E, Hansen, D W, Madsen, D B, Morey, P W, Roming, M B, Savage, P F, Eastman, V, Jensen   +13 more
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Equal-curvature grazing-incidence x-ray telescopes

Applied Optics, 2003
We introduce a new type of x-ray telescope design, an equal-curvature telescope. We simply add a second-order axial sag to the base grazing-incidence cone-cone telescope. The radius of curvature of the sag terms is the same on the primary surface and on the secondary surface.
Timo T, Saha, William, Zhang
openaire   +2 more sources

Orthogonal Mirror Telescopes for X-ray Astronomy

Applied Optics, 1971
Crossed mirror telescopes are presented as an alternative to the present telescope systems used in x-ray astronomy. These instruments generally have a higher x-ray collecting efficiency but a poorer angular resolution than the more conventional paraboloid-hyperboloid telescopes.
L P, Vanspeybroeck, R C, Chase, T F, Zehnpfennig   +2 more
openaire   +2 more sources