| Autor: |
M. Cantin, Herbert W. Schnopper, L. Koch, R. F. Berthelsdorf, R. Racchia, B. Mougin, J. L. Culhane |
| Rok vydání: |
1981 |
| Předmět: |
|
| Zdroj: |
X-Ray Astronomy ISBN: 9789401099516 |
| DOI: |
10.1007/978-94-010-9949-3_86 |
| Popis: |
Free-standing, concentrating, Bragg crystal spectrometers offer the most practical way to achieve adequate sensitivity for high resolution studies of cosmic x-ray sources in the energy range ~ 500 eV to 104 eV. Such an instrument can provide either crystal limited resolution for a point source or nearly stigmatic imaging of an extended source without requiring spectral or raster scans and/or stringent spacecraft pointing. In addition, a bandwidth which is generally sufficient to record the hydrogen and helium-like emission lines and the neutral K-emission and absorption features of the cosmically interesting elements is recorded simultaneously. For similar primary apertures, the achievable sensitivity compares very favorably with what can be obtained from an instrument in the focal plane of a large grazing incidence telescope. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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