천문학논총 (Publications of The Korean Astronomical Society)

  • 제24권1호
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  • Pages.35-41
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  • 2009
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  • 1225-1534(pISSN)
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  • 2287-6936(eISSN)
한국천문학회 (The Korean Astronomical Society)
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대기 흡수선을 이용한 시선속도 측정 정밀도 향상

IMPROVEMENT OF RADIAL VELOCITY MEASUREMENT ACCURACY BY TELLURIC LINES

  • 발행 : 2009.12.31
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초록

We present a method to improve the RV (radial velocity) measurements accuracy by using telluric lines. Telluric lines are used to estimate the wavelength scale drift over the detector of the spectrograph. In the case of BOES, the Echelle spectrograph at BOAO (Bohyunsan Optical Astronomical Observatory), the wavelength scale drift can be several hundreds m/s over 24 hours. Due to the wavelength scale drift, the RV measurements accuracy of BOES is limited to several hundreds m/s. By estimating the wavelength scale drift by telluric lines, we can remove its effect to improve the RV measurements accuracy to about 40 m/s.

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참고문헌

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