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7 March 2003 GOHSS: A MOS fiber-fed multi-echelle spectrograph in the near infrared (0.9-1.8 μm)
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We describe the current status and technical aspects of the GOHSS (Galileo OH Subtracted Spectrograph) project. Here we point out the most critical items and how we have implemented innovative technical solutions to fulfill the compelling requirements imposed by both the optical tolerances and the demands of a high sensitivity. In particular we examine the camera lens mechanics realized in ultra low expansion quartz; the refrigerator system; the IR array mount realized in an unconventional way; the effort put in procuring optical devices with quite large efficiencies. We are also developing the data reduction package along with the instrument simulator: the optimized procedures and the results on the visibility function of galaxies are given as well. Currently the instrument is in the integration phase at the laboratories of the Astronomical Observatory of Rome and the commissioning phase at the telescope is expected to start at the beginning of year 2003.
© (2003) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Dario Lorenzetti, Fausto Cortecchia, Francesco D'Alessio, Agostino Fiorani, Gianluca Li Causi, Dario Mancini, Roberto Scaramella, Roberto Speziali, and Fabrizio Vitali "GOHSS: A MOS fiber-fed multi-echelle spectrograph in the near infrared (0.9-1.8 μm)", Proc. SPIE 4841, Instrument Design and Performance for Optical/Infrared Ground-based Telescopes, (7 March 2003);


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