Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994pasp..106...87h&link_type=abstract
Publications of the Astronomical Society of the Pacific, vol. 106, no. 695, p. 87-93
Astronomy and Astrophysics
Astronomy
29
Arrays, Extremely High Frequencies, Infrared Detectors, Infrared Spectrometers, Mercury Cadmium Tellurides, Near Infrared Radiation, Spectrographs, Astronomical Spectroscopy, Calibrating, Data Acquisition, Data Reduction, Infrared Astronomy, Infrared Spectroscopy
Scientific paper
KSPEC (k-band spectrograph) is an infrared spectrograph designed primarily for spectroscopy in the 2.0-2.5 micrometer region. It offers two different optical configurations. The first is a cross-dispersed echelle mode designed to cover the atmospheric windows from 1-2.5 micrometer in one spectral frame of a 256x256 format on a Near Infrared Camera and Multi-Object Spectrometer-3 (NICMOS-3) HgCdTe detector array. This configuration of the spectrograph provides medium spectral resolution (lambda/delta-lambda approximately = 500) for spectral classification work, emission-line detection, and redshift measurements. Alternatively, KSPEC can be equipped with a different spectrograph camera, giving a long-slit, single-order spectrum from 2.05-2.35 micrometer. The instrument uses a second NICMOS-3 infrared detector array for slit viewing, to facilitate the acquisition of optically invisible objects, to document the slit position, and to monitor it during long spectroscopic integrations. KSPEC does not contain any moving components, making it a very reliable, relatively low-cost instrument that is easy to use.
Hodapp Klaus-Werner
Hora Joseph L.
Irwin Everett
Young Tony
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