0.8 - 2.5 micron spectrum of the planetary nebula Hubble 12

KSPEC: K-band Spectrograph


The University of Hawaii (UH) K-band spectrograph (KSPEC) utilizes a cross-dispersed echelle design to provide medium-resolution spectra of the 0.8--2.5 micron region, optimized for 2.2 microns. The instrument uses two arrays, a HAWAII 1024x1024 array as the detector for the spectral information, and a 256x256 NICMOS array as a slit-viewing array which images the region of the sky surrounding the slit. The control software runs on a unix workstation and is similar to the QUIRC camera. The KSPEC dewar has two liquid nitrogen reservoirs-- one large capacity (4.92 liter) which cools the radiation shields, central cold plate, optics, and imaging detector, and one smaller (2.46 liter) reservoir which is thermally connected to only the spectral array. The hold time for the large reservoir is approximately 17 hours; the hold time for the smaller one is several days because of the low heat load. The dewar contains no moving parts, other than the externally mounted shutter. The electronics consists of separate driver boards, preamps, and A/D boards for the two arrays, and a Leach DSP controller that clocks the arrays and provides the data link to the workstation.

Documentation, technical papers


The following paper should be referenced in papers including KSPEC2 data (with the 1024x1024 array): The following paper describes the original KSPEC (with the NICMOS3 arrays): The following papers describe the HAWAII detector development program:

Useful Data

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Last modified 1996 December 10

Joseph Hora (hora@galileo.ifa.hawaii.edu)