Results 141 to 150 of about 1,428 (186)

Magnetic star-planet interaction in the young exoplanet system DS Tucanae Ab

Santos Ld, Owen J, Duvvuri G, Loyd ROP, Vidotto A, Presa A, Bourrier V, King G, Airapetian V, Ehrenreich D, France K, Lendl M, Lothringer J, Nielsen L.   +13 more
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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.
Bavdaz, M., Lumb, D., Gondoin, P., Lyngvi, A., Rando, N., Peacock, T., van der Laan, T., Wallace, K., Mieremet, A., Oemrawsingh, S., Beijersbergen, M., Collon, M., Kraft, S., Graue, R., Kampf, D., Freyberg, M.   +15 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
Yoshiharu Namba, Koujun Yamashita, Neil Gehrels   +2 more
exaly   +3 more sources

Operation of the x-ray telescope eROSITA

SPIE Proceedings, 2010
The X-ray telescope eROSITA is the core instrument besides the Russian ART-XC on the Russian Spektrum-Roentgen- Gamma satellite which will be launched in 2012 to an orbit around the L2 point of the Earth-Sun-system. During both survey and pointing phase the solar panels and the antenna constrain the possible mission scenario.
Fürmetz, M., Predehl, P., Eder, J., Tiedemann, L.   +3 more
openaire   +2 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, J. A. M. Bleeker, A. J. F. den Boggende, G. Branduardi-Raymont, A. C. Brinkman, J. L. Culhane, E. H. B. M. Gronenschild, I. Mason, S. P. McKechnie   +8 more
openaire   +1 more source

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-
Keisuke Tamura, Chiaki Sakai, Nubuaki Yamada, Yasushi Ogasaka, Ryo Shibata   +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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The X-Ray CCDs Developed for the Joint European X-Ray Telescope

Journal of X-Ray Science and Technology: Clinical Applications of Diagnosis and Therapeutics, 1996
The charge coupled devices (CCDs) developed for the Joint European X-ray Telescope (JET-X) are described in detail. A history of the development program and device performance is given. We present results from a comprehensive study to characterize the x-ray response of the flight model focal plane detectors.
Owens, A, Abbey, AF, Brauninger, H, Burkert, W, Castelli, C, Chapman, H, Dowson, J, Li, Y, McCarthy, KJ, Pool, P, Sims, MR, Spragg, J, Watson, DJ, Wells, A, Willingale, R   +14 more
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S056 X-Ray Telescope Experiment on the Skylab Apollo Telescope Mount

Applied Optics, 1977
This paper describes the S056 x-ray instrument which was carried aboard the Skylab Apollo Telescope Mount as part of the solar instrument cluster. The instrument, which was built at the NASA Marshall Space Flight Center, consisted of a glancing incidence x-ray telescope to record solar images in the 6-40-A region, together with an x-ray event analyzer ...
J H Underwood
exaly   +3 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
exaly   +3 more sources