Space Science Laboratory, NASA Marshall Space Flight Center, Huntsville, Alabama 35812.
J Xray Sci Technol. 1991 Jan 1;3(1):35-44. doi: 10.3233/XST-1991-3104.
This study examines the dependence of the effective area of the AXAF x-ray telescope, upon the complex dielectric constants of possible mirror coatings, over the energy range 0.1-10 keV. At energies near and above the astrophysically important iron-line complex near 6.7 keV, the effective area is very sensitive to the coating density on the three innermost of the telescope's six mirror pairs. Thus, it is desirable to achieve as high a density as feasible. The telescope's spectral response exhibits sharp features at absorption edges of the coating materials. In view of the exceptional energy resolution of the AXAF spectrometers and uncertainties in reflectivities (especially near absorption edges), the AXAF goal of 1% accuracy requires both precise x-ray calibration of the telescope and improved modeling of the telescope and calibration sources. Presented here in the form of plots, the results are also available (on floppy disks) in tabular form.
这项研究考察了在 0.1-10keV 的能区范围内，AXAF （X 射线望远镜）有效面积对可能的镜涂层复介电常数的依赖关系。在靠近和高于天体物理上重要的铁线复合体（约 6.7keV）的能量处，有效面积对望远镜的六镜对中最里面的三对镜涂层的密度非常敏感。因此，尽可能实现高的密度是可取的。望远镜的光谱响应在涂层材料的吸收边缘处呈现出明显的特征。鉴于 AXAF （光谱仪）的出色能量分辨率和反射率的不确定性（特别是在吸收边缘附近），AXAF （望远镜）的 1%的准确度目标要求对望远镜进行精确的 X 射线校准，并改进望远镜和校准源的建模。这里以图形的形式给出了结果，也以表格的形式（在软盘上）提供了结果。
