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Table 3

Typical spectroscopic limiting magnitudes corresponding to a total exposure time of one hour with an S/N of 3 for point-like objects under a median seeing of 2.5 arcsec, and with Moon conditions of 135° from the Moon and an illumination of 25%.

Abs. lines blue dispersor Abs. lines red dispersor Em. lines blue dispersor Em. lines red dispersor
V magnitude ≤19.5 ≤19.5 ≤20.5 ≤20

Notes. The values are given for pure absorption line spectra (blue dispersor), pure absorption line spectra (red dispersor), emission line spectra (blue dispersor), and emission line spectra (red dispersor).

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