Deep fiber spectroscopy

Ian Robert Parry; Esperanza Carrasco

doi:10.1117/12.19133

1 July 1990 Deep fiber spectroscopy

Ian Robert Parry, Esperanza Carrasco

Proceedings Volume 1235, Instrumentation in Astronomy VII; (1990) https://doi.org/10.1117/12.19133
Event: SPIE Astronomical Telescopes and Instrumentation for the 21st Century, 1990, Tucson, AZ, United States

Abstract

Techniques for improving the subtraction of sky background when performing multiobject spectroscopy with fiber-optic-link instruments are examined analytically and by means of numerical simulations. The sky subtraction problems for multislit, long-slit, and fiber-optic spectroscopy are compared; the detrimental effects of fiber misalignment, poor-quality fiber end preparation, stress-related focal-ratio degradation, absorption losses, and connector losses are described; and consideration is given to improvements based on (1) using higher-quality fibers, (2) allowing for wavelength-dependent differences in fiber response, and (3) mimicking the multislit method by allocating more fibers to each object. The effects of vignetting and parameter shifts on computer-simulated spectra are shown in graphs.

Citation Download Citation

Ian Robert Parry and Esperanza Carrasco "Deep fiber spectroscopy", Proc. SPIE 1235, Instrumentation in Astronomy VII, (1 July 1990); https://doi.org/10.1117/12.19133

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