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  • On-sky tests of sky-subtraction methods for fiber-fed spectrographs
    Rodrigues, Myriam; Cirasuolo, Michele; Hammer, Francois; Royer, Frederic; Evans, C J; Puech, Mathieu; Flores, Hector; Guinouard, Isabelle; Gianluca Li Causi; Disseau, Karen; Yang, Yanbin

    arXiv.org, 09/2016
    Paper, Journal Article

    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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