Statistics
Scientific paper
Jul 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990pasp..102..806h&link_type=abstract
Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 102, July 1990, p. 806-834.
Statistics
16
Hubble Space Telescope, Image Processing, Stellar Spectrophotometry, Light Scattering, Pixels, Signal To Noise Ratios, Simulation, Spaceborne Telescopes
Scientific paper
Simulations of Wide Field/Planetary Camera (WF/PC) images are analyzed in order to discover the most effective techniques for stellar photometry and to evaluate the accuracy and limitations of these techniques. The capabilities and operation of the WF/PC and the simulations employed in the study are described. The basic techniques of stellar photometry and methods to improve these techniques for the WF/PC are discussed. The correct parameters for star detection, aperture photometry, and point-spread function (PSF) fitting with the DAOPHOT software of Stetson (1987) are determined. Consideration is given to undersampling of the stellar images by the detector; variations in the PSF; and the crowding of the stellar images. It is noted that, with some changes DAOPHOT, is able to generate photometry almost to the level of photon statistics.
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