Title: Mid-Infrared High-Dispersion Molecular Spectroscopy using Ge Immersion Grating Spectrograph (IRHS)

Authors: N. Ebizuka, Y. Hirahara, T. Hirao, T.K. Oka, S. Tatamitani, T. Masuda, H. Tokoro, Y. Yamagata, S. Morita, S. Yin, H. Omori, K. Kawaguchi, S. Sato

Abstract:
We have developed a mid-infrared spectrograph (prototype IRHS) with a Ge immersion echelle grating, and evaluated performance of the spectrograph. Absorption and emission spectra of Ë2 band of ammonium are successfully obtained by means of the prototype IRHS. As result of the evaluations, the prototype IRHS has resolving power up to 40,000.