IUE data reduction - The parameterization of the motion of the IUE reseau grids and spectral formats as a function of time and temperature

Details IUE data reduction - The parameterization of the motion of the IUE reseau grids and spectral formats as a function of time and temperature IUE data reduction - The parameterization of the motion of the IUE reseau grids and spectral formats as a function of time and temperature

Mar 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...107...11t&link_type=abstract

Astronomy and Astrophysics, vol. 107, no. 1, Mar. 1982, p. 11-22.

Astronomy and Astrophysics

Astronomy

29

Data Reduction, Instrument Errors, Iue, Secular Variations, Temperature Effects, Ultraviolet Astronomy, Astronomical Models, Interstellar Matter, Oao 3, Temperature Gradients, Ultraviolet Radiation, Ultraviolet Spectra, Wavelengths

Scientific paper

Improvements are made on IUE data reduction using corrected reseau positions and dispersion constants for temperature variations and secular effects. Models describing the motion of the high dispersion spectral format as a function of THDA alone reduce the scatter in the predicted position of a given wavelength, and scatter is further reduced when a linear dependence on time is also allowed. A correction technique is presented for early data which reduces errors in wavelength assignments from over 30 km/s to less than 3 km/s in high dispersion. The reseau temperature correction helps locate the minimum background signal, centered between the echelle orders. The residual uncertainty of 2 km/s for SWP and 2.7 km/s for LWR makes the wavelength accuracy of time and temperature corrected IUE spectra comparable to that of temperature corrected data from the Copernicus satellite.

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