The PAlomar Radial Velocity Instrument (PARVI) is a diffraction-limited, high-resolution spectrograph connected by single-mode fiber to the 200 inch Hale telescope at Palomar Observatory. Here, we present on-sky results for HD 189733 obtained during PARVI’s commissioning phase. We first describe the implementation of our spectral extraction and radial velocity (RV) generation codes. Through RV monitoring, we detect the Rossiter–Mclaughlin signal of the transiting planet HD 189733 b. We further detect the presence of water and carbon monoxide in the atmosphere of HD 189733 b via transmission spectroscopy. This work demonstrates PARVI’s high-resolution spectral capabilities at H band and current intra-night Doppler stability of ∼4 to 10 m s − 1 on an early K dwarf. Finally, we discuss the limitations to this work and ongoing efforts to characterize and improve the Doppler performance of PARVI to the design goal of ∼1 m s − 1 for late-type stars.

中文翻译：

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使用 PAlomar 径向速度仪对 HD 189733 进行调试观测

PAlomar 径向速度仪器 (PARVI) 是一种衍射极限高分辨率光谱仪，通过单模光纤连接到 Palomar 天文台的 200 英寸 Hale 望远镜。在这里，我们展示了在 PARVI 调试阶段获得的 HD 189733 的天空结果。我们首先描述光谱提取和径向速度（RV）生成代码的实现。通过RV监测，我们检测到凌日行星HD 189733 b的罗西特-麦克劳林信号。我们通过透射光谱进一步检测 HD 189733 b 大气中是否存在水和一氧化碳。这项工作展示了 PARVI 在 H 波段的高分辨率光谱能力，以及早期 K 矮星目前夜间多普勒稳定性为 ∼4 至 10 m s − 1 。最后，