A method to subtract the skylight for the multi-fiber instrument E-ELT/OPTIMOS-EVE

M. Rodrigues; H. Flores; M. Puech; Y. Yang; F. Royer

doi:10.1117/12.856956

20 July 2010 A method to subtract the skylight for the multi-fiber instrument E-ELT/OPTIMOS-EVE

M. Rodrigues, H. Flores, M. Puech, Y. Yang, F. Royer

Proceedings Volume 7735, Ground-based and Airborne Instrumentation for Astronomy III; 77356L (2010) https://doi.org/10.1117/12.856956
Event: SPIE Astronomical Telescopes + Instrumentation, 2010, San Diego, California, United States

Abstract

We present a new method to subtract sky light from faint object observations with fiber-fed spectrographs. The algorithm has been developed in the framework of the phase A of OPTIMOS-EVE, an optical-to-IR multi-object spectrograph for the future european extremely large telescope (E-ELT). The new technique overcomes the apparent limitation of fiber-fed instrument to recover with high accuracy the sky contribution. The algorithm is based on the reconstruction of the spatial fluctuations of the sky background (both continuum and emission) and allows us to subtract the sky background contribution in an FoV of 7 × 7 arcmin² with an accuracy of 1% in the mono-fibers mode, and 0.3-0.4% for integral-field-unit observations.

Citation Download Citation

M. Rodrigues, H. Flores, M. Puech, Y. Yang, and F. Royer "A method to subtract the skylight for the multi-fiber instrument E-ELT/OPTIMOS-EVE", Proc. SPIE 7735, Ground-based and Airborne Instrumentation for Astronomy III, 77356L (20 July 2010); https://doi.org/10.1117/12.856956

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