Gemini Instruments

Gemini North

The instruments available on Gemini North are:

  • GRACES, a fibre feed from the Gemini North telescope to the ESPaDOnS spectrograph at CFHT, offering high-resolution (R~67,500) optical spectroscopy between 400 and 1000 nm.
  • the GMOS optical imager, multi-object, and integral field spectrograph.
  • the NIFS near-infrared (0.95-2.4 micron) integral field unit spectrograph.
  • the GNIRS 1-5 micron long-slit spectrograph is available in all modes, except with the short red camera. YJHK imaging is available via the acquisition keyhole.
  • the NIRI near-infrared (1-5 micron) imager.

GNIRS, NIRI, and NIFS can be used in conjunction with the ALTAIR adaptive optics system, using natural or laser guide stars, or in the LGS+PWFS1 "super seeing" mode. Note however that due to flexure, frequent reacquisition with the LGS+PWFS1 mode may be necessary.

Gemini South

The instruments available on Gemini South are:

  • the GMOS optical imager, multi-object, and integral field spectrograph, with a a set of 3 Hamamatsu CCDs with quantum efficiency > 80% from 500-900nm, and reduced fringing cf. the old E2V CCDs.
  • the Gemini Planet Imager (GPI), an adaptive optics 0.9-2.4 micron imaging/polarimeter/integral-field spectrometer is available in all modes (including Non Redundant Masking in shared-risks) throughout the semester. The instrument is restricted to a maximum zenith distance of 50 degrees, and CC50 with IQ70 for nominal performance. PIs should note the GPI target duplication policy.
  • The FLAMINGOS-2 near-infrared imager and spectrograph is available for imaging and long-slit spectroscopy. The spectral resolution with narrow slits varies with wavelength. MOS mode commissioning is planned to commence in 2016A, but cannot yet be offered to the community.
  • The Gemini Multi-Conjugate Adaptive Optics system GeMS, and the Gemini South Adaptive Optics Imager, which together deliver diffraction-limited images over a 85 arcsec field of view. Applicants should check the availability of suitable Guide Star constellations (with 3, 2, or even just 1 Canopus Wave Front Sensor stars, and one On-Detector Guide Window star) using the Observing Tool before submitting a proposal. Applicants should note that observations in IQ85 are possible and welcomed for programs that can use delivered images with full-width half-maximum ~0.2 arcseconds instead of the <= 0.1 arcseconds delivered in IQ70 or IQ20 conditions.