GHRS INSTRUMENT REPORT "Unintended Values in Your CDBS Tables" August 21,1991 by: Doug Duncan Abstract supplied by author: Results of SV tests on the accuracy of routine spectral calibration lamp wavelength calibration of GHRS Side 2 data are reported. The Dispersion Constants reference table used for all pipeline calibration to date was found to contain some bad values which can lead to offsets of up to 1 Angstrom on the wavelength scale. Using a correct, though still pre-flight, Dispersion Constants reference table, routine accuracy of 0.02 Angstroms. or better is produced. For first order gratings, recalibration of data can be expected to lead to wavelength accuracy of around 0.006 Angstroms.
