Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004adspr..34.2682o&link_type=abstract
Advances in Space Research, Volume 34, Issue 12, p. 2682-2687.
Astronomy and Astrophysics
Astronomy
1
Hard X-Ray Telescopes, X-Ray Astronomy, Supermirrors, Multilayers
Scientific paper
X-ray telescopes have been providing high sensitivity X-ray observations in numerous missions. For X-ray telescopes in the future, one of the key technologies is to expand the energy band beyond 10 keV. We designed depth-graded multilayer, so-called supermirrors, for a hard X-ray telescope in the energy band up to 40 keV using lightweight thin-foil optics. They were successfully flown in a balloon flight and obtained a hard X-ray image of Cyg X-1 in the 20-40 keV band. Now supermirrors are promising to realize a hard X-ray telescope. We have estimated the performance of a hard X-ray telescope using a platinum-carbon supermirror for future satellite missions, such as NeXT (Japan) and XEUS (Europe). According to calculations, they will have a significant effective area up to 80 keV, and their effective areas will be more than 280 cm2 even at 60 keV. Limiting sensitivity will be down to 1.7×10-13 ergcm-2s-1 in the 10-80 keV band at a 100 ks observation. In this paper, we present the results of the balloon experiment with the first supermirror flown and projected effective areas of hard X-ray telescopes and action items for future missions.
Furuzawa Akihiro
Kunieda Hideyo
Ogasaka Yasushi
Okajima Takashi
Tamura Katsuhiro
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