Results 181 to 190 of about 111,221 (213)

The XEUS x-ray telescope

SPIE Proceedings, 2006
XEUS, the 'X-ray Early Universe Spectroscopy Mission', is a potential candidate for inclusion into the Cosmic Visions 1525 Science Programme of the European Space Agency ESA [1,2]. It is being studied jointly with the Japanese Aerospace Exploration Agency JAXA.
Philippe Gondoin, Arjan L. Mieremet, Kotska Wallace, Dirk Kampf, Aleksander Lyngvi, Tone Peacock, Roland Graue, Nicola Rando, Stefan Kraft, David H. Lumb, Michael Freyberg, Maximilien J. Collon, Marcos Bavdaz, Thijs van der Laan, Sumant Oemrawsingh, Marco W. Beijersbergen   +15 more
openaire   +2 more sources

The Swift X-Ray Telescope

AIP Conference Proceedings, 2003
The Swift Gamma‐Ray Burst Explorer is designed to make prompt multiwavelength observations of Gamma‐Ray Bursts (GRBs) and their 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.
Oberto Citterio, A. Short, Joanne E. Hill, John A. Nousek, Martin J. L. Turner, Alan A. Wells, Guido Chincarini, Gianpiero Tagliaferri, David N. Burrows   +8 more
openaire   +2 more sources

Swift X-Ray Telescope

SPIE Proceedings, 2000
The Swift Gamma Ray Burst Explorer will be launched in 2003 to observe hundreds of gamma-ray bursts per year and study their X-ray and optical afterglows, using a multiwavelength complement of three instruments: a wide-field Burst Alert Telescope (BAT), an X-Ray Telescope (XRT), and a UV/Optical Telescope (UVOT).
A. Short, Alan A. Wells, Guido Chincarini, Oberto Citterio, Richard Willingale, John A. Nousek, Gianpiero Tagliaferri, David N. Burrows, Joanne E. Hill   +8 more
openaire   +2 more sources

Supermirror hard-x-ray telescope

Applied Optics, 1998
The practical use of a grazing x-ray telescope is demonstrated for hard-x-ray imaging as hard as 40 keV by means of a depth-graded d-spacing multilayer, a so-called supermirror. Platinum-carbon multilayers of 26 layer pairs in three blocks with a different periodic length d of 3-5 nm were designed to enhance the reflectivity in the energy range from 24
A. M. Parsons, Peter J. Serlemitsos, Norio Nakajo, Keisuke Tamura, Takashi Okajima, Kazutoshi Haga, G. S. Lodha, G. S. Lodha, Lyle M. Bartlett, Bonnard J. Teegarden, Harumi Takata, Scott Barthelmy, Hideyo Kunieda, Norihiko Nakamura, Jack Tueller, Kai Wing Chan, Carl M. Stahl, D. M. Palmer, Yasushi Ogasaka, Peter Kurczynski, Neil Gehrels, Yang Soong, Akihiro Furuzawa, K. Yamashita, Yoshiharu Namba, Yuzuru Tawara   +25 more
openaire   +3 more sources

The X-Ray Imaging Telescopes on EXOSAT

Space Science Reviews, 1981
The instrument configuration and performance characteristics of the X-ray imaging telescopes on EXOSAT are described. The instrument comprises two fully independent Wolter I imaging telescopes. Each telescope can be used in either of two principal modes: (i) an imaging mode with either a position sensitive proportional counter or a channel multiplier ...
P. A. J. de Korte, A. C. Brinkman, I. M. Mason, Johan A. M. Bleeker, Graziella Branduardi-Raymont, A. J. F. den Boggende, J. L. Culhane, S. P. McKechnie, E. Gronenschild   +8 more
openaire   +2 more sources

The Swift X-Ray Telescope

SPIE Proceedings, 2004
The Swift Gamma-Ray Explorer is designed to make prompt multiwavelength observations of Gamma-Ray Bursts (GRBs) and GRB Afterglows. The X-ray Telescope (XRT) provides key capabilities that permit Swift to determine GRB positions with a few arcseconds accuracy within 100 seconds of the burst onset.
Robert Klar, Koji Mori, Oberto Citterio, Darach Watson, A. Short, J. Bosworth, B. J. Miles, Wolfgang Burkert, Michael Freyberg, F. Tamburelli, Richard Willingale, C. Mangels, Wen Pei Chang, Gisela Hartner, John A. Nousek, A. F. Abbey, Heinrich Bräuninger, Ronnie Killough, J. P. Osborne, Alberto Moretti, Alan A. Wells, Guido Chincarini, Sergio Campana, Andrew P. Beardmore, Joanne E. Hill, Paolo Giommi, Gianpiero Tagliaferri, David N. Burrows, B. Kittle, Michael E. Zugger, K. Mukerjee, D. C. Morris, M. Capalbi, M. McMeekin   +33 more
openaire   +2 more sources

Development of x-ray mirrors for x-ray telescopes

SPIE Proceedings, 2005
We have been developing X-ray mirrors for X-ray telescope using a ion-beam sputtering system. X-rays can be reflected by two processes, one is total reflection, and another is Bragg reflection. Total reflection is used for previous telescope below 10 keV. Its reflectivity determined by the optical constant. We suggests composite-layer mirror for soft X-
Nubuaki Yamada, Chiaki Sakai, Ryo Shibata, Keisuke Tamura, Yasushi Ogasaka   +4 more
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X-ray telescopes

Reports on Progress in Physics, 1985
This review summarises the present knowledge about X-ray reflection from real mirrors, with particular emphasis on X-ray scattering. The mirror configurations for a telescope are presented and their imaging capabilities are discussed. The fabrication techniques and the supporting metrology methods used for the manufacture of highly aspherical telescope
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History of X-ray telescopes and astronomy [PDF]

Experimental Astronomy, 2009
The development of X-ray telescopes over the last 45 years is briefly summarized. The first applications to the study of solar X-ray emission are described up to the 1973 Skylab mission. The rather convoluted path that led to the first stellar X-ray orbiting telescope Einstein (1978) and later to Chandra (1999) are discussed.
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Hartmann testing of x-ray telescopes [PDF]

SPIE Proceedings, 2013
Hartmann testing of x-ray telescopes is a simple test method to retrieve and analyze alignment errors and low-order circumferential errors of x-ray telescopes and their components. A narrow slit is scanned along the circumference of the telescope in front of the mirror and the centroids of the images are calculated.
Timo T. Saha, William W. Zhang, Michael P. Biskach   +2 more
openaire   +1 more source