New Technology Telescope

The New Technology Telescope (NTT) is a European Southern Observatory (ESO) 3.58-meter reflector telescope residing at the La Silla Observatory (LSO) in Chile. It has been in operation since 1989 and was an early telescope using adaptive optics (AO). Instruments:

• SOFI "Son of ISAAC" - near-infrared camera and low resolution spectrograph, modeled after the ESO VLT instrument, ISAAC.
• EFOSC2 "ESO Faint Object Spectrograph and Camera v.2" - optical camera and low resolution spectrograph.

In development is SoXS ("Son of X-Shooter"), modeled after the ESO VLT, X-Shooter, expected to replace SOFI. First light expected in early 2025. Some former instruments:

• EMMI "ESO Multi-Mode Instrument" - imager and spectrograph.
• SUSI-1 "Superb Seeing Instrument" - imager.
• SUSI-2 "Superb Seeing Instrument 2" - improved imager.
• IRSPEC "infrared spectrometer".
• CES "coudé echelle spectrometer".
• TIMMI2 "Thermal Infrared MultiMode Instrument 2".
• ADONIS "Adaptive Optics Near Infrared System".