论文标题
JWST/NIRSPEC检测器系统的机上噪声性能
The In-Flight Noise Performance of the JWST/NIRSpec Detector System
论文作者
论文摘要
近红外光谱仪（NIRSPEC）是詹姆斯·韦伯（James Webb）太空望远镜（JWST）上的四个焦点仪器，该仪器于2021年12月25日推出。我们介绍了从仪器调试数据中得出的NIRSPEC检测器系统的飞行状态和性能。该仪器具有两个2048 x 2048夏威夷2RG传感器芯片组件（SCA），它们在约42.8 K的温度下运行，并通过一对辅助ASIC读出。 NIRSPEC支持“改进的参考抽样和减法”（IRS2）读数模式，该模式旨在满足NIRSPEC严格的噪声要求，并减少1/F和相关噪声。此外，NIRSPEC具有针对明亮对象时间序列观测的优化子阵列，例如为了观察明亮的宿主星周周围的系外行星过境。我们专注于暗信号以及检测器的读取和总噪声性能。
The Near-Infrared Spectrograph (NIRSpec) is one the four focal plane instruments on the James Webb Space Telescope (JWST) which was launched on December 25, 2021. We present the in-flight status and performance of NIRSpec's detector system as derived from the instrument commissioning data. The instrument features two 2048 x 2048 HAWAII-2RG sensor chip assemblies (SCAs) that are operated at a temperature of about 42.8 K and are read out via a pair of SIDECAR ASICs. NIRSpec supports "Improved Reference Sampling and Subtraction" (IRS2) readout mode that was designed to meet NIRSpec's stringent noise requirements and to reduce 1/f and correlated noise. In addition, NIRSpec features subarrays optimized for bright object time series observations, e.g. for the observation of exoplanet transit around bright host stars. We focus on the dark signal as well as the read and total noise performance of the detectors.
