Calibration and in-orbit performance of the reflection grating spectrometer onboard XMM-Newton
Calibration and in-orbit performance of the reflection grating spectrometer onboard XMM-Newton
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DOI：
10.1051/0004-6361/201423704
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发表时间：
2015-01-01
影响因子：
6.5
通讯作者：
Paerels, F. B. S.
中科院分区：
文献类型：
--
作者：
de Vries, C. P.;den Herder, J. W.;Paerels, F. B. S.
上下文XMM-Newton于1999年12月10日发射，自2000年初以来一直在运行。XMM-牛顿号上的仪器之一是反射光栅光谱仪（RGS）。有两个相同的RGS仪器可供使用，每个RGS都结合了反射光栅组件和带有电荷耦合器件的相机来记录光谱。我们描述的RGS仪器的校准和在轨性能。通过将飞行前校准与适当的飞行中校准数据相结合，包括探测器性能随时间的变化，我们的目标是深入了解校准的准确性。这对于各种物体光谱特征的正确科学解释至关重要。方法。地面校准本身并不能完全表征仪器的特性。专用的飞行测量和持续监测对于全面了解仪器和仪器响应随时间的变化至关重要。仪器的物理模型被调整到与校准测量一致，并且是实际仪器响应可以在整个参数空间内插的基础。仪器响应的不稳定性已减少到
Context. XMM-Newton was launched on 10 December 1999 and has been operational since early 2000. One of the instruments onboard XMM-Newton is the reflection grating spectrometer (RGS). Two identical RGS instruments are available, with each RGS combining a reflection grating assembly and a camera with charge-coupled devices to record the spectra.Aims. We describe the calibration and in-orbit performance of the RGS instrument. By combining the preflight calibration with appropriate inflight calibration data including the changes in detector performance over time, we aim at profound knowledge about the accuracy in the calibration. This will be crucial for any correct scientific interpretation of spectral features for a wide variety of objects.Methods. Ground calibrations alone are not able to fully characterize the instrument. Dedicated inflight measurements and constant monitoring are essential for a full understanding of the instrument and the variations of the instrument response over time. Physical models of the instrument are tuned to agree with calibration measurements and are the basis from which the actual instrument response can be interpolated over the full parameter space.Results. Uncertainties in the instrument response have been reduced to