MOSFIRE Modes and Instrument Properties

Modes

MOSFIRE has two basic modes:

  • Near-IR imaging
  • Near-IR spectroscopy

Table 1 provides a summary of these modes, options, and features of MOSFIRE.

Table1: Modes

Mode Characteristics
Imaging 6.1'x6.1' FOV with vignetted corners; 0.1798"/pixel, 0.97-2.4 microns
Spectroscopy 6.1'x3' FOV; variable length and width slits; R~3000

Instrument Properties

Table 2 gives a summary of MOSFIRE's properties and design parameters. For more details, see MOSFIRE Instrument and Data Format

Table2: Instrument Properties

Property Value
Input f/ ratio f/15N
Wavelength range 0.9-5.3 microns
Field of view 6.14 x 6.14 arcmin (imaging); 6.14 x 3 arcmin spectroscopy
Pixel scale 0.1798 arcsec/pixel
Filters Y, J, H, K, Ks, J2, J3, H1, H2
Slits Cryogenic Configurable Slit Unit (CSU): ~45 remotely configurable slits each 7.3" long; configurable as a smaller number of longer slits. Each slit width can be adjusted arbitrarily.
Minimum frame time 1.455 sec
Detector 2048x2048 Teledyne Hawaii-2RG HgCdTe
gain = 2.15 electrons/ADU
Read noise
  • CDS -> 21e rms
  • MCDS 4 -> 10.8e rms
  • MCDS 8 -> 7.7e rms
  • MCDS 16 -> 5.8e rms
  • MCDS 32 -> 4.2e rms
  • MCDS 64 -> 3.5e rms
  • MCDS 128 -> 3.0e rms
Dark current < 0.008 electrons/pixel/sec