| Autor: |
G.W. Fraser, Giorgio Matt, G. Chanan, Eric H. Silver, Ping-Shine Shaw, Brian D. Ramsey, J.E. Lees, L. Piro, Andrea Santangelo, S. Giarrusso, Philip E. Kaaret, G. C. Perola, Martin C. Weisskopf, R. A. Sunyaev, Enrico Massaro, T. T. Hamilton, Klaus P. Ziock, James F. Pearson, Enrico Costa, Robert Novick, R. F. Elsner, I. Lapshov, Christopher Martin, Judith R. Fleischman, G. Manzo |
| Rok vydání: |
1990 |
| Předmět: |
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| Zdroj: |
Observatories in Earth Orbit and Beyond ISBN: 9789401055284 |
| Popis: |
We describe an X-ray polarimeter which will be flown on the SPECTRUM-X-Gamma mission. The instrument exploits three distinct physical processes to measure polarization: Bragg reflection from a graphite crystal, Thomson scattering from a metallic lithium target, and photoemission from a Cesium Iodide photocathode. These three processes allow polarization measurements over an energy band of 0.3 keV to 12 keV. The polarimeter will make possible sensitive measurements of several hundred known X-ray sources. X-ray polarization measurements will allow us to constrain the geometry of gas flow in X-ray binaries, identify nonthermal emission in supernova remnants, test current models for X-ray emission in radio pulsars, determine the radiation mechanisms in active galactic nuclei, and search for inertial frame dragging (Lense-Thirring effect) around the putative black hole in Cygnus X-1. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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