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BASICS ABOUT PHOENIX




Telescope: KPNO 4 m, 2.1 m
Wavelength range: 1 to 5 microns
Wavelength coverage: 0.51 percent = 1500 km s-1
Limiting magnitude: ~10 at K and H at S/N~10 in 1 hour on the 2.1 m.
(Also see Exposure Time Calculator.)
Throughput: ~9 percent (excluding telescope and slit losses)
Slit loss: Geometric with plate scale and seeing
Slit width: 2 pixel = 0.34", 4 pixel = 0.70" at 4 m 2 pixel = 0.7", 4 pixel = 1.4" at 2.1 m
Slits available: 2, 3, 4 pixel, no slit (i.e. open), 2 pixel pin hole
Slit length: 28" at 4m, 54" at 2.1 m
Resolution: 2 pixel ~ 75000, 4 pixel = 50000
Inverse Linear Dispersion: wavenumbers per pixel = wavenumber /[1.11 x 105 tan (grating angle)]
Flexure:
~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: FITS
Acquisition: IR imaging mode with circular FOV equal slit length through order sorting filter
Guiding: Visible/IR dichroic
Instrument scientist: Ken Hinkle (hinkle@noao.edu; 520-318-8298)


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National Optical Astronomy Observatories, 950 N. Cherry Avenue, P.O. Box 26732, Tucson, AZ 85726, Phone: (520) 318-8000, Fax: (520) 318-8360

Updated: 2012 Feb