Ground based observations of stellar spectra in the near infrared at low dispersions

Astronomy and Astrophysics – Astronomy

Scientific paper

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Astronomical Observatories, Infrared Spectroscopy, Near Infrared Radiation, Stellar Spectra, Wave Dispersion, Gratings (Spectra), Ground Stations, Prisms, Stellar Magnitude

Scientific paper

Two types of low-dispersion (lower than 500 A/mm at 0.75 micron) ground-based spectroscopy in the near-IR spectral region between 0.7 and 0.9 micron are described. Objective-prism and grating techniques in the near-IR are considered, along with a slitless spectrographic technique involving nonobjective dispersors. Results of some low-dispersion near-IR surveys are reviewed, emphasizing the techniques employed and limiting magnitudes attained.

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