论文标题
Nustar光谱分析超过79 KEV，带有流量光
NuSTAR spectral analysis beyond 79 keV with stray light
论文作者
论文摘要
由于Nustar望远镜的结构，大轴（> 1维格）处的光子可以直接到达检测器（流浪光），而无需通过仪器光学仪。在这些离轴角度上，nustar基本上变成了准仪器，并且光谱可以延伸至多层的Pt K-边缘（79 keV）上方的能量，从而限制了光学的有效面积。我们使用Cygnus X-1观察（在流浪光观察目录）中使用Cygnus X-1观察到了79 KEV以上的第一个科学光谱分析。这种偶然的杂散观察是同时发生的，并进行了积分观察。当光谱在30-120 KEV能量带中一起建模时，我们发现Nustar弹性光通量经过了良好的校准和约束，以与90％置信度的积分通量保持一致。此外，我们解释了如何处理杂散光谱分析的背景，这在高能量下尤为重要。
Due to the structure of the NuSTAR telescope, photons at large off-axis (> 1deg) can reach the detectors directly (stray light), without passing through the instrument optics. At these off-axis angles NuSTAR essentially turns into a collimated instrument and the spectrum can extend to energies above the Pt k-edge (79 keV) of the multi-layers, which limits the effective area bandpass of the optics. We present the first scientific spectral analysis beyond 79 keV using a Cygnus X-1 observation in StrayCats, the catalog of stray light observations. This serendipitous stray light observation occurred simultaneously with an INTEGRAL observation. When the spectra are modeled together in the 30-120 keV energy band, we find that the NuSTAR stray light flux is well calibrated and constrained to be consistent with the INTEGRAL flux at the 90% confidence level. Furthermore, we explain how to treat the background of the stray light spectral analysis, which is especially important at high energies.
