KSPEC -- A Near-Infrared Cross-Dispersed Spectrograph
Abstract
KSPEC (K-Band Spectrograph) is an infrared spectrograph designed primarily for spectroscopy in the 2.0 - 2.5 micron 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 microns in one spectral frame of 256 X 256 format on a NICMOS-3 HgCdTe detector array. This configuration of the spectrograph provides medium spectral resolution (lambda/delta-lambda ~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 microns. 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 monitorit 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. (SECTION: Instrumentation and Data Analysis)
- Publication:
-
Publications of the Astronomical Society of the Pacific
- Pub Date:
- January 1994
- DOI:
- 10.1086/133347
- Bibcode:
- 1994PASP..106...87H
- Keywords:
-
- 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;
- Astronomy;
- INSTRUMENTATION: SPECTROGRAPHS