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scarlet: Source separation in multi-band images by Constrained Matrix Factorization

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Ada Coda
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scarlet: Source separation in multi-band images by Constrained Matrix Factorization

Postby Ada Coda » Thu Mar 08, 2018 4:55 pm

scarlet: Source separation in multi-band images by Constrained Matrix Factorization

Abstract: SCARLET performs source separation (aka "deblending") on multi-band images. It is geared towards optical astronomy, where scenes are composed of stars and galaxies, but it is straightforward to apply it to other imaging data. Separation is achieved through a constrained matrix factorization, which models each source with a Spectral Energy Distribution (SED) and a non-parametric morphology, or multiple such components per source. The code performs forced photometry (with PSF matching if needed) using an optimal weight function given by the signal-to-noise weighted morphology across bands. The approach works well if the sources in the scene have different colors and can be further strengthened by imposing various additional constraints/priors on each source. Because of its generic utility, this package provides a stand-alone implementation that contains the core components of the source separation algorithm. However, the development of this package is part of the LSST Science Pipeline; the meas_deblender package contains a wrapper to implement the algorithms here for the LSST stack.

Credit: Melchior, Peter; Moolekamp, Fred; Jerdee, Maximilian; Armstrong, Robert; Sun, Ai-Lei; Bosch, James; Lupton, Robert

Site: https://github.com/fred3m/scarlet
http://adsabs.harvard.edu/abs/2018arXiv180210157M

Bibcode: 2018ascl.soft03003M

Preferred citation method: http://adsabs.harvard.edu/abs/2018arXiv180210157M

ID: ascl:1803.003
Last edited by Ada Coda on Thu Mar 08, 2018 4:56 pm, edited 1 time in total.
Reason: Updated code entry.

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