Two types of spectroscopy are possible with FLAMINGOS-2 and its selection of gratings.

• Long-slit spectroscopy with longslit masks of width 1-pix, 2-pix, 3-pix, 4-pix, 6-pix, 8-pix. They have length ~4.4' (263", 1460 pixels) in the standard f/16 (non-AO) mode.
• Multi-object spectroscopy with custom cut MOS masks, covering a 2' x 6'.1 field of view (see the FLAMINGOS-2 optomechanical diagrams)

The gratings and filters used by both modes and the detector properties are summarized below.

• Filters:
  • Y, J-low, J, H, K_s broad-band filter set permanently installed
  • We expect to have two narrow-band filters (wavelengths to be determined) also installed at any given time.
  • There is an upgrade path being investigated for the construction and installation of a dual-etalon tunable narrow-band filter to be used with the f/32 MCAO system.
• Grisms:
  • Two lower resolution grisms (JH and HK) with R~1200 and simultaneously covering the J&H or H&K bands
  • One higher resolution grism with R~3000 (two pixel) giving complete coverage of one (Y or J or H or K) near-IR band at a time
• Science detector for the FLAMINGOS-2 HAWAII-II array
• Camera and Imaging Properties:
  • Pixel scale: 0.18 arcsec/pix at f/16; 0.09 arcsec/pix at f/32 with MCAO
  • Spectroscopic field of view in MOS mode: 6.'1 x 2' at f/16