Measure fiber position errors from spectra data for LAMOST

Jian-Jun Chen; Zhong-Rui Bai; A-Li Luo; Yong-Heng Zhao

doi:10.1117/12.2055460

7 August 2014 Measure fiber position errors from spectra data for LAMOST

Jian-Jun Chen, Zhong-Rui Bai, A-Li Luo, Yong-Heng Zhao

Author Affiliations +

Proceedings Volume 9149, Observatory Operations: Strategies, Processes, and Systems V; 91491N (2014) https://doi.org/10.1117/12.2055460
Event: SPIE Astronomical Telescopes + Instrumentation, 2014, Montréal, Quebec, Canada

Abstract

LAMOST is a 4m reflecting Schmidt telescope special designed for conducting multifiber spectroscopic survey with 4000 fibers. Fiber position errors greatly impact spectral data SNR. There are three groups of sources that contribute to fiber position errors: errors orthogonal to the optical axis of telescope, errors parallel to the optical axis, and the fiber tilt from the telescope optical axis. It is difficult to measure these errors, especially during the observation. In this poster, we propose an indirect method to calculate the total and systematic position errors for each individual fiber from spectra data by constructing a model of magnitude loss due to the fiber position error for the point source.

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Jian-Jun Chen, Zhong-Rui Bai, A-Li Luo, and Yong-Heng Zhao "Measure fiber position errors from spectra data for LAMOST", Proc. SPIE 9149, Observatory Operations: Strategies, Processes, and Systems V, 91491N (7 August 2014); https://doi.org/10.1117/12.2055460

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