IMPLEMENTING A RIGOROUS WEIGHTING SCHEME FOR FITTING TO ROTATIONALLY RESOLVED SPECTRAL LINE POSITIONS
Loading...
Date
1992
Journal Title
Journal ISSN
Volume Title
Publisher
Ohio State University
Abstract
Independent observations should be weighted according to the inverse of the squares of their uncertainties in any fitting procedure. For many types of spectroscopic experiments, uncertainties are not easy to determine. For rotationally resolved spectral data recorded digitally and presented in the form of a transmittance spectrum, we have devised a procedure which automatically determines the correct relative weights of line positions. This procedure uses a background spectrum to determine the local S/N of each line. It also considers the degree of distortion in the line shape, which becomes important for strong lines, due to Beer’s law. Our program has been implemented to supply statistical weights for data recorded with the Bruker IFS 120 H.R interferometer. Example of applications to current data, such as bands in the infrared spectrum at HCNO, will be presented.
Description
Author Institution: Physikalisch-Chemisches Institut, Justus-Liebig-Universit\""{a}t Giessen, W-6300; Physikalisch-Chemisches Institut, Academia Istropolitana Zelen\acute{a}