SPECtrophotometer for TRansmission Spectroscopy of Exoplanets (SPECTR)

IF 3.3 3区物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS

Publications of the Astronomical Society of the Pacific Pub Date : 2024-08-20 DOI:10.1088/1538-3873/ad692d

Yeon-Ho Choi, Myeong-Gu Park, Kang-Min Kim, Jae-Rim Koo, Tae-Yang Bang, Chan Park, Jeong-Gyun Jang, Inwoo Han, Bi-Ho Jang, Jong Ung Lee, Ueejeong Jeong, Byeong-Cheol Lee

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Abstract

The SPECtrophotometer for TRansmission spectroscopy of exoplanets (SPECTR) is a new low-resolution optical (3800–6850 Å) spectrophotometer installed at the Bohyunsan Optical Astronomy Observatory 1.8 m telescope. SPECTR is designed for observing the transmission spectra of transiting exoplanets. Unique features of SPECTR are its long slit length of 10′ which facilitates observing the target and the comparison star simultaneously, and its wide slit width to minimize slit losses. SPECTR will be used to survey exoplanets, such as those identified by the Transiting Exoplanet Survey Satellite, providing information about their radii across the wavelength range. In this paper, we present the design of SPECTR and the observational results of the partial transit of HD 189733 b and a full transit of Qatar-8 b. Analyses show the SPECTR’s capability on the white light curves with an accuracy of one ppt. The transmission spectrum of HD 189733 b shows general agreement with previous studies.

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系外行星透射光谱 SPECtrophotometer（SPECTR）

用于系外行星透射光谱分析的分光光度计（SPECTR）是安装在宝云山光学天文观测台 1.8 米望远镜上的新型低分辨率光学分光光度计（3800-6850 Å）。SPECTR 专为观测凌日系外行星的透射光谱而设计。SPECTR 的独特之处在于其长达 10′的狭缝长度便于同时观测目标和对比恒星，其宽大的狭缝宽度可最大限度地减少狭缝损耗。SPECTR 将用于巡天系外行星，例如那些由凌日系外行星巡天卫星发现的系外行星，提供其在整个波长范围内的半径信息。本文介绍了 SPECTR 的设计以及 HD 189733 b 部分凌日和 Qatar-8 b 全部凌日的观测结果。HD 189733 b 的透射光谱与以前的研究结果基本一致。

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来源期刊

Publications of the Astronomical Society of the Pacific 地学天文-天文与天体物理

CiteScore

6.70

自引率

5.70%

发文量

103

审稿时长

4-8 weeks

期刊介绍： The Publications of the Astronomical Society of the Pacific (PASP), the technical journal of the Astronomical Society of the Pacific (ASP), has been published regularly since 1889, and is an integral part of the ASP''s mission to advance the science of astronomy and disseminate astronomical information. The journal provides an outlet for astronomical results of a scientific nature and serves to keep readers in touch with current astronomical research. It contains refereed research and instrumentation articles, invited and contributed reviews, tutorials, and dissertation summaries.