Author/Authors :
Berendse، Fred نويسنده , , Owens، Scott M. نويسنده , , Serlemitsos، Peter J. نويسنده , , Tueller، Jack نويسنده , , Chan، Kai-Wing نويسنده , , Soong، Yang نويسنده , , Krimm، Hans نويسنده , , Baumgartner، Wayne H. نويسنده , , Ogasaka، Yasushi نويسنده , , Tamura، Keisuke نويسنده , , Okajima، Takashi نويسنده , , Tawara، Yuzuru نويسنده , , Yamashita، Koujun نويسنده , , Misaki، Kazutami نويسنده , , Kunieda، Hideyo نويسنده ,
Abstract :
The International Focusing Optics Collaboration for (mu)Crab Sensitivity (InFOC (mu)S) balloonborne hard x-ray telescope incorporates graded Pt /C multilayers replicated onto segmented Al foils to obtain the significant effective area at energies previously inaccessible to x-ray optics. Reflectivity measurements of individual foils demonstrate our capability to produce a mass quantity of multilayered foils with a rms roughness of 0.5 nm. The effective area of the completed mirror is 78 and 22 cm^2 at 20 and 40 keV, respectively. The measured half-power diameter is 2.0 +/- 0.5 arc min (90% confidence). The successful completion of this mirror demonstrates its applicability to future x-ray telescopes such as Constellation-X.
Keywords :
Consistency , Doppler , multipath , Spectral density function , harmonizable functions , Estimation , Bias , covariance , cyclostationary , aliasing
