Abstract
We report the success of our first engineering run with Z-Spec, a new millimeter spectrograph on the 10 m Caltech Submillimeter Telescope during the first week of June 2005. The bolometric instrument is indeed the first of its kind, covering the atmospheric window from 187 to 310 GHz at the spectral resolution of 250–400, and will provide a critical follow-up study for discoveries by SCUBA and Bolocam. We present the spectrum of an ultra-luminous infrared galaxy NGG 6240 obtained by Z-Spec. Z-Spec serves as a prototype for future far-IR spectrometers on a cold space telescope where large gains in sensitivity are expected.
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