Night-sky spectral atlas of OH emission lines in the near-infrared

In this paper, we present medium resolution spectra of the night-sky OH emission. The spectra cover the range 0.997 - 2.25 μm with a resolution of about 8000. Line wavelengths are computed from laboratory data and are given in vacuum. A few lines due to O_2 are also identified. This new set of data can be used to calibrate the wavelength scale of spectra obtained in the near-infrared. It can also help to distinguish between the lines due to astronomical objects and lines due to the earth atmosphere.