Accurate stellar photometry in crowded fields

Details Accurate stellar photometry in crowded fields Accurate stellar photometry in crowded fields

May 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989mnras.238..807m&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 238, May 15, 1989, p. 807-833. Research supported by AS

Astronomy and Astrophysics

Astronomy

13

Astronomical Photometry, Charge Coupled Devices, Globular Clusters, Hubble Space Telescope, Image Processing, Stellar Spectrophotometry, Algorithms, Least Squares Method, Pixels, Point Spread Functions

Scientific paper

A nonlinear least-squares point-spread-function fitting algorithm is proposed that can obtain accurate stellar photometry with CCD observations of crowded fields. The algorithm is shown to be robust enough to provide simultaneously excellent photometry and an accurate determination of the background sky level, even for the case of data containing no pixels at the background sky level. It is noted that the use of ad hoc radial weighting functions should be avoided.

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