Accuracy of measurement of star images on a pixel array

Details Accuracy of measurement of star images on a pixel array Accuracy of measurement of star images on a pixel array

Feb 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983pasp...95..163k&link_type=abstract

Astronomical Society of the Pacific, Publications, vol. 95, Feb. 1983, p. 163-168.

Astronomy and Astrophysics

Astronomy

46

Astrometry, Brightness, Signal To Noise Ratios, Stellar Luminosity, Stellar Spectrophotometry, Vidicons, Accuracy, Algorithms, Least Squares Method, Poisson Density Functions

Scientific paper

Algorithms are developed for predicting the accuracy with which the brightness of a star can be determined from its image on a digital detector array, as a function of the brightness of the background. The assumption is made that a known profile is being fitted by least squares. The two profiles used correspond to ST images and to ground-based observations. The first result is an approximate rule of thumb for equivalent noise area. More rigorous results are then given in tabular form. The size of the pixels, relative to the image size, is taken into account. Astronometric accuracy is also discussed briefly; the error, relative to image size, is very similar to the photometric error relative to brightness.

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