Hostname: page-component-cb9f654ff-h4f6x Total loading time: 0 Render date: 2025-09-01T15:45:32.165Z Has data issue: false hasContentIssue false
  • English
  • Français

High Precision Crowded Field Photometry

Published online by Cambridge University Press:  14 August 2015

Peter Linde
Peter Linde*
Affiliation:
Lund Observatory, Box 43, S-221 00 Lund, Sweden

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Methods have been developed for high precision photometry in crowded stellar fields. The procedure includes the following steps:

  • • Determination of a two-dimensional point spread function

  • • Definition of groups of stars with mutually overlapping images

  • • Determination of local background for each star group

  • • Simultaneous fitting of point spread functions, one for each star in the group

The Lund approach emphasizes interactivity. Many fundamental procedures are facilitated by the use of an optimised image display. Extensive modelling has been done to study the influence of various error sources.

References

Buonanno, R., Buscema, G., Corsi, C.E., Ferraro, I. and Iannicola, G., Astron. Astrophys, 126, p. 278, 1983.Google Scholar
Gill, P.E., and Murray, W. SIAM Journal on Numerical Analysis, 15, p. 977, 1978.CrossRefGoogle Scholar
Irwin, M.J., In Data Analysis in Astronomy, Eds. di Gesù, V., Scarsi, L., Crane, P., Friedman, J.H., Levialdi, S., Plenum Press, New York-London, p. 439, 1985.CrossRefGoogle Scholar
Linde, P., Image analysis in Astronomy, thesis, Lund Observatory 1988.Google Scholar
Newell, B., In Image Processing in Astronomy, Eds. Sedmak, G. Cappaccioli, M. Allen, R.J., Osservatorio Astronomico di Trieste, p. 100, 1979.Google Scholar
Penny, A.J., In IAU Colloquium 10, Astronomical Applications of Image Detectors with Linear Response, eds. Duchesne, M. and Lelievre, G. (Paris: Paris-Meudon Observatory), p. 49–1, 1976.Google Scholar
Stetson, P.B., Publ. Astron. Soc. Pacific, 99, p. 191, 1987.CrossRefGoogle Scholar