Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994exa.....3...29l&link_type=abstract
Experimental Astronomy, vol. 3, no. 1-4, p. 29-36
Astronomy and Astrophysics
Astronomy
Astronomical Photometry, Astronomical Spectroscopy, Echelle Gratings, Infrared Astronomy, Infrared Detectors, Infrared Photometry, Infrared Spectra, Infrared Spectroscopy, Infrared Telescopes, Spectrographs, Calibrating, Emission Spectra, High Resolution, Imaging Techniques, Line Spectra, Scanning, Signal To Noise Ratios, Spectral Line Width, Spectral Resolution
Scientific paper
Irshell, a mid-infrared echelle spectrograph developed through a collaboration between the University of Texas, the University of California Space Sciences Laboratory, and Hughes Aircraft, has been in regular use for astronomical observations for about five years. It is optimized for high spectral resolution (R approximately 10,000) observations of narrow spectral regions (delta-lambda/lambda approximately 1/300) and compact sources (a few arcsec), and is sensitive in the 5 to 25 micrometer region. A wide variety of astronomical objects have been studied. Observing techniques have been developed to achieve maximum sensitivity in those observations for which Irshell is best suited and to allow observations of wide spectral regions and extended objects. We discuss the observing techniques and show some of the data obtained.
Achtermann Jeffrey Mark
Lacy John H.
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