TY - JOUR
T1 - Hard X-ray focusing optics up to 80 keV for the future missions
AU - Okajima, T.
AU - Tawara, Y.
AU - Ogasaka, Y.
AU - Tamura, K.
AU - Furuzawa, A.
AU - Yamashita, K.
AU - Kunieda, H.
N1 - Funding Information:
T. Okajima acknowledges the Japan Society for the Promotion of Science for the support of fellowship. This work has been supported in part by a Grant-in-Aid for Scientific Research on Specially Promoted Research, Contract No. 07102007, from the Ministry of Education, Science, Sports, and Culture, Japan.
PY - 2004
Y1 - 2004
N2 - 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 cm 2 even at 60 keV. Limiting sensitivity will be down to 1.7 × 10 -13 erg cm -2 s -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.
AB - 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 cm 2 even at 60 keV. Limiting sensitivity will be down to 1.7 × 10 -13 erg cm -2 s -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.
UR - https://www.scopus.com/pages/publications/9544243711
UR - https://www.scopus.com/pages/publications/9544243711#tab=citedBy
U2 - 10.1016/j.asr.2003.03.057
DO - 10.1016/j.asr.2003.03.057
M3 - Article
AN - SCOPUS:9544243711
SN - 0273-1177
VL - 34
SP - 2682
EP - 2687
JO - Advances in Space Research
JF - Advances in Space Research
IS - 12 SPEC.ISS.
ER -