On-sky tests of sky-subtraction methods for fiber-fed spectrographs

Myriam Rodrigues; M. Cirasuolo; F. Hammer; F. Royer; C. J. Evans; M. Puech; H. Flores; I. Guinouard; Gianluca Li Causi; K. Disseau; Y. Yang

doi:10.1117/12.924878

13 September 2012 On-sky tests of sky-subtraction methods for fiber-fed spectrographs

Myriam Rodrigues, M. Cirasuolo, F. Hammer, F. Royer, C. J. Evans, M. Puech, H. Flores, I. Guinouard, Gianluca Li Causi, K. Disseau, Y. Yang

Author Affiliations +

Proceedings Volume 8450, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation II; 84503H (2012) https://doi.org/10.1117/12.924878
Event: SPIE Astronomical Telescopes + Instrumentation, 2012, Amsterdam, Netherlands

Abstract

We present preliminary results on on-sky test of sky subtraction methods for fiber-fed spectrograph. Using dedicated observation with FLAMES/VLT in I-band, we have tested the accuracy of the sky subtraction for 4 sky subtraction methods: mean sky, closest sky, dual stare and cross-beam switching. The cross beam-switching and dual stare method reach accuracy and precision of the sky subtraction under 1%. In contrast to the commonly held view in the literature, this result points out that fiber-fed spectrographs are adapted for the observations of faint targets.

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Myriam Rodrigues, M. Cirasuolo, F. Hammer, F. Royer, C. J. Evans, M. Puech, H. Flores, I. Guinouard, Gianluca Li Causi, K. Disseau, and Y. Yang "On-sky tests of sky-subtraction methods for fiber-fed spectrographs", Proc. SPIE 8450, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation II, 84503H (13 September 2012); https://doi.org/10.1117/12.924878

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