Carlo Baffa,Sandro Gennari Osservatorio Astrofisico di Arcetri (Italy) Leslie K. Hunt CAISMI-CNR (Italy) Franco Lisi Osservatorio Astrofisico di Arcetri (Italy) Gianni Tofani CAISMI-CNR (Italy) Leonardo Vanzi Univ. di Firenze (Italy)
We describe the general characteristics of the TIRGO infrared telescope, located on Gornergrat (Switzerland), and its most recent instrumentation. This telescope is specifically designed for infrared astronomical observations. Two newly designed instruments are presented: the imaging camera Arnica and the long-slit spectrometer LonGSp, both based on two-dimensional array detectors.