13 September 2012 On-sky tests of sky-subtraction methods for fiber-fed spectrographs
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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, Myriam Rodrigues, M. Cirasuolo, M. Cirasuolo, F. Hammer, F. Hammer, F. Royer, F. Royer, C. J. Evans, C. J. Evans, M. Puech, M. Puech, H. Flores, H. Flores, I. Guinouard, I. Guinouard, Gianluca Li Causi, Gianluca Li Causi, K. Disseau, K. Disseau, Y. Yang, 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); doi: 10.1117/12.924878; https://doi.org/10.1117/12.924878
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