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Mid-Infrared Wavelength Calibration |
Spectra can be wavelength calibrated using sky emission and/or absorption lines observed in standard stars and/or the raw science data. Low resolution atmospheric transmission spectra are available (10um [PDF] and 20um [PDF]), as are ASCII files of atmospheric transmission at spectral resolutions up to 25,000. Tools to calculate Mauna Kea transmission spectra and produce line identifications at echelle resolution are also available.
The line identification process is described in some detail on the spectroscopy data reduction page.
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Last update 2007 May 22nd; Rachel Mason