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| Paper: |
EMphot — Photometric Software with Bayesian Priors: Application to GALEX |
| Volume: |
442, Astronomical Data Analysis Software and Systems XX (ADASSXX) |
| Page: |
107 |
| Authors: |
Conseil, S.; Vibert, D.; Amouts, S.; Milliard, B.; Zamojski, M.; Liebaria, A.; Guillaume, M. |
| Abstract: |
EMphot is a software tool for the photometry of astrophysical sources, galaxies
and stars, in crowded field images. Its goal is to estimate the flux in a
low resolution band using prior information (position and shape) from a
better resolved band, in a Bayesian approach under the Poisson noise
assumption. The solution is reached with an Expectation-Maximization (EM)
algorithm for solving the photometry and includes several steps: prior
shapes deblending in high resolution images, astrometry correction, PSF
optimization, background correction from the residual. |
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