caa a22 4500 469077093 CHVBK 20180323132938.0 cr unu---uuuuu 170328e19920901xx s 000 0 eng 10.1007/BF02507860 doi (NATIONALLICENCE)springer-10.1007/BF02507860 A perspective view to hard-X-ray astronomy [Elektronische Daten] [D. Dal Fiume, F. Frontera] Summary: The present observational and instrumental status of hard-X-ray astronomy ((10÷200) keV) is discussed. The relevance of observations in this energy range is stressed and a few examples of unsolved observational problems in galactic and in extragalactic astronomy are discussed. In these examples we focus on the possibility to solve the problems with observations using detectors of the current generation. In this framework, the performances of the most sensitive hard-X-ray detectors are discussed with particular emphasis on the control of systematic errors. Quite simple but unavoidable considerations on limits of the present generation of hard-X-ray detectors (supported by results of simple simulations) lead to the conclusion that a decisive breakthrough can be achieved only using optics with a sufficiently good concentration power. In particular we discuss the feasibility of hard-X-ray telescopes (with a concentration power ≫1), using either grazing incidence or Bragg diffraction. The use of concentrators in this energy band can also make feasible polarimetric measures of a substantial sample of X-ray sources, up to now severely limited by the very low detection efficiency of the devices used in polarimetry. Società Italiana di Fisica, 1992 X-ray sources nationallicence X-ray and γ-ray telescopes nationallicence Dal Fiume D. Istituto TESRE, CNR, Bologna, Italia aut Frontera F. Istituto TESRE, CNR, Bologna, Italia aut Il Nuovo Cimento C Kluwer Academic Publishers 15/5(1992-09-01), 851-866 0390-5551 15:5<851 1992 15 11543 https://doi.org/10.1007/BF02507860 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02507860 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Dal Fiume D. Istituto TESRE, CNR, Bologna, Italia aut NATIONALLICENCE 700 1- Frontera F. Istituto TESRE, CNR, Bologna, Italia aut NATIONALLICENCE 773 0- Il Nuovo Cimento C Kluwer Academic Publishers 15/5(1992-09-01), 851-866 0390-5551 15:5<851 1992 15 11543 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer