论文标题
JWST/NIRSPEC的光谱时间序列性能从调试观察结果
Spectroscopic Time-series Performance of JWST/NIRSpec from Commissioning Observations
论文作者
论文摘要
我们报告了使用G395H/F290LP磁带/滤清器组合（$3-5μ$ M）获得的JWST委托观察，该观察是使用NIRSPEC仪器的Bright Object Time序列（BOTS）模式（$3-5μ$ M）获得的。虽然数据主要用于验证NIRSPEC机器人模式是否按预期运行，并启用它以供一般的科学使用，但它们产生了精确的传输频谱，我们发现这些频谱毫无疑问地归功于仪器的精确水平，与HAT-P-14〜B的预期相一致，既符合HAT-P-14〜B的小规模高度高），并且是预期的大气氛围。 \ emph {jwst/nirspec}的出色质量和稳定性 - 几乎没有任何系统效应 - 使我们能够在此波长范围内以$ r = 100 $的单个限制和限制$ n的限制（或在$ r = theplype close）中获得50-60 ppm的中值不确定性，并且在$ r = 100 $中，这是$ n的（或）$ no =（或）$ no no no no no =） 9.094 $，像HAT-P-14一样的F型星。这些观察结果展示了NIRSPEC/机器人执行尖端的过境系外行星大气科学的能力，从而为在第1周期及以后做出的观察和发现奠定了基础。
We report on JWST commissioning observations of the transiting exoplanet HAT-P-14 b, obtained using the Bright Object Time Series (BOTS) mode of the NIRSpec instrument with the G395H/F290LP grating/filter combination ($3-5μ$m). While the data were used primarily to verify that the NIRSpec BOTS mode is working as expected, and to enable it for general scientific use, they yield a precise transmission spectrum which we find is featureless down to the precision level of the instrument, consistent with expectations given HAT-P-14~b's small scale-height and hence expected atmospheric features. The exquisite quality and stability of the \emph{JWST/NIRSpec} transit spectrum -- almost devoid of any systematic effects -- allowed us to obtain median uncertainties of 50-60 ppm in this wavelength range at a resolution of $R=100$ in a single exposure, which is in excellent agreement with pre-flight expectations and close to the (or at the) photon-noise limit for a $J = 9.094$, F-type star like HAT-P-14. These observations showcase the ability of NIRSpec/BOTS to perform cutting-edge transiting exoplanet atmospheric science, setting the stage for observations and discoveries to be made in Cycle 1 and beyond.
