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Showing 1 to 4 of 4 for “"PSF fitting"”.
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Comparison of PSF fitting methods for determining centroids of stars
This paper shows a comparison of four fitting models used in order to calculate the centroids for twelve stars. The offsets for each coordinate are calculated with respect to the mean of the coordinates for varying aperture sizes. The computed offsets are then compared to determine if there was any …
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A Search for Low-Amplitude Variability Among Population I Main Sequence Stars
… the photometric results. Point Spread Function (PSF) fitting is the best method available for measuring accurate magnitudes within crowded fields of stars, while high-precision differential photometry is the preferred technique for removing the effects of atmospheric extinction and variable …
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Resolved stellar populations: watching galaxy evolution in real time
… for this process is DAOPHOT (Stetson, 1987). PSF-fitting photometry was performed using a few hundreds of point sources, selected from non-crowed areas, to fit the point-spread functions. This process, however, was repeated a couple of times in order to get a well adjusted point-spread …
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Crowded field spectroscopy and the search for intermediate-mass black holes in globular clusters
… characterized by the point spread function (PSF), hence they appear blended in crowded stellar fields. Classical spectroscopy does not preserve any spatial information, therefore it is impossible to separate the spectra of blended stars and to measure their velocities. Yet methods have been …