| Telescope: | Gemini South | |
|---|---|---|
| Wavelength range: | 1 to 5 microns | |
| Wavelength coverage: | 0.51 percent = 1500 km s-1 | |
| Limiting magnitude: |
~14 at K and H at S/N~10 in 1 hour. Untested on Gemini.
(Also see Exposure Time Calculator.) | |
| Throughput: | slitless ~13 percent | |
| Slit loss: | Geometric with plate scale and seeing | |
| Slit width: | 2 pixel = 0.17", 4 pixel = 0.35" | |
| Slits available: | 2, 3, 4 pixel, no slit (i.e. open), 2 pixel pin hole | |
| Slit length: | 14" | |
| Resolution: | 2 pixel ~ 75000, 4 pixel = 50000 | |
| Inverse Linear Dispersion: | wavenumbers per pixel = wavenumber /[1.11 x 105 tan (grating angle)] | |
| Flexure: |
TBD on an alt-az telescope.
~1 km s-1 per hour at high airmass on an equatorial telescope. | |
| Blaze angle/grating: | 63.4 degree, 31 groove per mm echelle. | |
| Order separation: | Order sorting filters (table and specifications ) | |
| Cross dispersed: | No | |
| Scattered light: | ~2 percent in cores of opaque telluric lines | |
| Detector Array: | Aladdin II InSb 1024 x 1024, 1024 x 256 used. 27 micron pixels | |
| ADU per electron: | 9.2 e- | |
| Dark current: | 0.15 e-/second | |
| Read noise: | 40 e- | |
| Computer control: | Wildfire | |
| Data format: | IRAF images, easily converted to FITS | |
| Acquisition: | IR imaging mode, field of view 14", image through order sorting filters | |
| Guiding: |
The visible/ir dichroic will not be used at Gemini. Guiding will be done by Gemini guide probes. | |
| Instrument scientist: | Ken Hinkle (hinkle@noao.edu; 520-318-8298) |
Updated: 10Sep1999