Errors in Elliptical Gaussian FITS

Details Errors in Elliptical Gaussian FITS Errors in Elliptical Gaussian FITS

Feb 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997pasp..109..166c&link_type=abstract

Publications of the Astronomical Society of the Pacific, v.109, p.166-172

Astronomy and Astrophysics

Astronomy

102

Methods: Data Analysis

Scientific paper

Elliptical Gaussian fits are used in astronomy for accurate measurements of fundamental source parameters such as central position, peak flux density, and angular size. The full value of a noise-limited image can be realized only if the effects of noise on the fitted parameters are estimated accurately. This paper presents the equations of error propagation for two-dimensional elliptical Gaussian fits in the presence of Gaussian noise plus a new method that simplifies the use of a priori size constraints to reduce amplitude errors. (SECTION: Computing and Data Analysis)

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