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[ascl:2106.004] crowdsource: Crowded field photometry pipeline

crowdsource removes a rough sky (the median), find the brighter peaks and fits these sources, computes centroids, and then computes an improved PSF. With this model of the image, the code then iteratively subtracts it and recomputes the median to get a better sky estimate, finds fainter peaks, and calculates a better PSF. crowdsource performs at least four iterations, evaluates the results, and continues until certain thresholds are met. Once the iterative passes are complete, it makes one last pass. If no sources are detected and positions do not vary, it performs photometry for the existing list of stellar positions.

Code site:
https://github.com/schlafly/crowdsource
Used in:
https://ui.adsabs.harvard.edu/abs/2021MNRAS.503.1507V
Described in:
https://ui.adsabs.harvard.edu/abs/2018ApJS..234...39S
Bibcode:
2021ascl.soft06004S

Views: 620

ascl:2106.004
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