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

P. Melchior, F. Moolekamp, M. Jerdee, R. Armstrong, A.-L. Sun, J. Bosch, R. Lupton
2018 Astronomy and Computing  
We present the source separation framework SCARLET for multi-band images, which is based on a generalization of the Non-negative Matrix Factorization to alternative and several simultaneous constraints  ...  SCARLET thus yields a PSF-matched photometry measurement with an optimally chosen weight function given by the mean morphology in all available bands.  ...  Acknowledgements This material is based upon work supported in part by the National Science Foundation through Cooperative Agreement 1258333 managed by the Association of Universities for Research in Astronomy  ... 
doi:10.1016/j.ascom.2018.07.001 fatcat:njtndeoa5zg5xjwpiy7o3mcg6u

Joint survey processing: combined resampling and convolution for galaxy modelling and deblending [article]

Rémy Joseph, Peter Melchior, Fred Moolekamp
2021 arXiv   pre-print
We present an extension of the multi-band galaxy fitting method scarlet which allows the joint modeling of astronomical images from different instruments, by performing simultaneous resampling and convolution  ...  Tests with a wide range of levels of blending show more accurate galaxy models from joint modeling of Euclid and Rubin images compared to separate modeling of each survey by up to an order of magnitude  ...  For multi-instrument modeling, the vector A k contains the concatenation of the amplitudes of source k in all bands of each available survey.  ... 
arXiv:2107.06984v1 fatcat:mlxjsj7imfalpirqyoav7m2gfm

Challenges for Dark Energy Science: Color Gradients and Blended Objects

Sowmya Kamath
2020 Zenodo  
The predicted multiplicative shear biases due to color gradients are found to be at least a factor of two below the LSST full-depth requirement on the total systematic uncertainty in the redshift-dependent  ...  Some of the most exciting scientific challenges at present in cosmology are in understanding the nature of dark matter and dark energy.  ...  The algorithm showing the most promise is the multi-band deblender SCARLET 3.2.3.2 Source separation with SCARLET SCARLET (Melchior et al., 2018 ) is a source separation framework for multi-band images  ... 
doi:10.5281/zenodo.3721437 fatcat:kpllaxbtjrdpdpzwcg2yh4qsey

Evaluating temporal changes using Multi-Spectral Scanner and Thematic Mapper data on the landscape of a natural reserve: The New Jersey Pine Barrens, a case study

S. S. Luque
2000 International Journal of Remote Sensing  
The Pinelands has experienced a change in landcover, with the mixed deciduous forest replacing the pine forest community.  ...  The combination of satellite remote sensing imagery and GIS provided the means to map and monitor land cover change at landscape level scales in the NJPNR.  ...  Lathrop reviewed earlier drafts of this manuscript and provided extremely helpful advice in the image processing. I also thank the valuable comments of two anonymous reviewers.  ... 
doi:10.1080/01431160050110197 fatcat:pgjxpmmhwzgvpiagfbxzllmbcy

Transmission spectroscopy for the warm sub-Neptune HD3167c: evidence for molecular absorption and a possible high metallicity atmosphere [article]

Thomas Mikal-Evans, Ian J. M. Crossfield, Bjorn Benneke, Laura Kreidberg, Julie Moses, Caroline V. Morley, Daniel Thorngren, Paul Molliere, Kevin K. Hardegree-Ullman, John Brewer, Jessie L. Christiansen, David R. Ciardi (+17 others)
2020 arXiv   pre-print
We find evidence for absorption by at least one of H2O, HCN, CO2, and CH4 (Bayes factor 7.4; 2.5-sigma significance), although the data precision does not allow us to unambiguously discriminate between  ...  In contrast, good agreement with the data is obtained for cloud-free models assuming metallicities >700x solar.  ...  Existing sub-Neptune observations provide only limited ability to constrain models in this multi-dimensional parameter space.  ... 
arXiv:2011.03470v1 fatcat:3oeacej5unf57a7zx5zt7m7hbm

Strict Upper Limits on the Carbon-to-Oxygen Ratios of Eight Hot Jupiters from Self-Consistent Atmospheric Retrieval [article]

Björn Benneke
2015 arXiv   pre-print
In this work, including our prior knowledge of H-C-N-O chemistry enables me to constrain the C/O ratio without detecting a single carbon-bearing molecule.  ...  The approach taken in SCARLET can be regarded as a new pathway to interpreting spectral observations of planetary atmospheres.  ...  Eventually, exoplanet observations may provide a statistical sample of precise C/O ratios in giant planet envelopes ranging from hot Jupiter to wide separation directly imaged giant planets.  ... 
arXiv:1504.07655v1 fatcat:3b5jiwkmajcsbbz5uxoervg73u

LSST DESC Science Roadmap [article]

The LSST Dark Energy Science Collaboration
2021 Zenodo  
The LSST DESC Science Roadmap (SRM) is primarily focused on providing a detailed framework (basic research priorities, along with infrastructure work in the form of software and dataset deliverables) that  ...  A new multi-band deblender, called Scarlet 5 , is being integrated in DM and evaluated. The Multi-object Fitting deblender 6 (MOF), first developed within the DES, is also being used for comparisons.  ...  → Project 9: BLISS: Bayesian Light Source Separator. → Project 46: Galaxy blending effects in deep imaging probes of cosmology. Other WG: WL.  ... 
doi:10.5281/zenodo.5209085 fatcat:spbo4zqgw5dsbbd2qjfjqxfexq

LSST DESC Science Roadmap [article]

The LSST Dark Energy Science Collaboration
2019 Zenodo  
The LSST DESC Science Roadmap (SRM) is primarily focused on providing a detailed framework (basic research priorities, along with infrastructure work in the form of software and dataset deliverables) that  ...  A new multi-band deblender, called Scarlet 5 , is being integrated in DM and evaluated.  ...  (a) Developing methods to enhance the identification and characterization of ultra-faint galaxies and stellar streams around the Milky Way, such as improved methods of star-galaxy separation, using multi-band  ... 
doi:10.5281/zenodo.3547566 fatcat:3silgrkudjf6jkalbwjlcbdml4

LSST DESC Science Roadmap [article]

The LSST Dark Energy Science Collaboration
2020 Zenodo  
The LSST DESC Science Roadmap (SRM) is primarily focused on providing a detailed framework (basic research priorities, along with infrastructure work in the form of software and dataset deliverables) that  ...  A new multi-band deblender, called Scarlet 5 , is being integrated in DM and evaluated.  ...  (a) Developing methods to enhance the identification and characterization of ultra-faint galaxies and stellar streams around the Milky Way, such as improved methods of star-galaxy separation, using multi-band  ... 
doi:10.5281/zenodo.4004764 fatcat:vlhvdbxje5ga7nw4zd3vo4zcpm

LSST DESC Science Roadmap [article]

The LSST Dark Energy Science Collaboration
2021 Zenodo  
The LSST DESC Science Roadmap (SRM) is primarily focused on providing a detailed framework (basic research priorities, along with infrastructure work in the form of software and dataset deliverables) that  ...  A new multi-band deblender, called Scarlet 5 , is being integrated in DM and evaluated. The Multi-object Fitting deblender 6 (MOF), first developed within the DES, is also being used for comparisons.  ...  DC2 covers all six optical bands ugrizy that will be observed by LSST and the area is increased by a factor of 7.5 to ≈300 deg 2 for the WFD area. DC2 also contains a DDF area of ≈1 deg 2 .  ... 
doi:10.5281/zenodo.5048817 fatcat:zqd3ledx2ba7hm3ivcufos4raq

LSST DESC Science Roadmap [article]

The LSST Dark Energy Science Collaboration
2019 Zenodo  
The LSST DESC Science Roadmap (SRM) is primarily focused on providing a detailed framework (basic research priorities, along with infrastructure work in the form of software and dataset deliverables) that  ...  We will then produce and serve simulated images.  ...  Approach: We will generate instance catalogs based on the extragalactic catalog produced in Deliverable "Extragalactic Catalogs for the DC2 Simulation".  ... 
doi:10.5281/zenodo.3547567 fatcat:52yfpyi5qrdxdmnwuisb4lll44

LSST DESC Science Roadmap [article]

The LSST Dark Energy Science Collaboration
2021 Zenodo  
The LSST DESC Science Roadmap (SRM) is primarily focused on providing a detailed framework (basic research priorities, along with infrastructure work in the form of software and dataset deliverables) that  ...  A new multi-band deblender, called Scarlet 5 , is being integrated in DM and evaluated. The Multi-object Fitting deblender 6 (MOF), first developed within the DES, is also being used for comparisons.  ...  DC2 covers all six optical bands ugrizy that will be observed by LSST and the area is increased by a factor of 7.5 to ≈300 deg 2 for the WFD area. DC2 also contains a DDF area of ≈1 deg 2 .  ... 
doi:10.5281/zenodo.4437790 fatcat:57dhuv65k5b3hp46cnatfrgecu

LSST DESC Science Roadmap [article]

The LSST Dark Energy Science Collaboration
2019 Zenodo  
The LSST DESC Science Roadmap (SRM) is primarily focused on providing a detailed framework (basic research priorities, along with infrastructure work in the form of software and dataset deliverables) that  ...  A new multi-band deblender, called Scarlet 5 , is being integrated in DM and evaluated. The Multi-object Fitting deblender 6 (MOF), first developed within the DES, is also being used for comparisons.  ...  DC2 covers all six optical bands ugrizy that will be observed by LSST and the area is increased by a factor of 7.5 to ≈300 deg 2 for the WFD area. DC2 also contains a DDF area of ≈1 deg 2 .  ... 
doi:10.5281/zenodo.3588457 fatcat:k7pyqxopqvfnvkopcpwn227lvu

25th Anniversary Article: Ordered Polymer Structures for the Engineering of Photons and Phonons

Jae-Hwang Lee, Cheong Yang Koh, Jonathan P. Singer, Seog-Jin Jeon, Martin Maldovan, Ori Stein, Edwin L. Thomas
2013 Advanced Materials  
Moreover, the artifi cially created non-linear photonic/phononic behavior of the periodic structures can be further diversifi ed and enhanced by introduction of intrinsic non-linear behavior of additives  ...  Trends Research on photonic crystals (PhCs) has been explosive for nearly three decades since the concept of the 3D PhCs was proposed independently for inhibition of the spontaneous emission of atoms by  ...  This work was supported by AOARD grants 114095 and 114078 by DTRA under contract 1-12-1-0008 and by the US Army Research Offi ce through the Institute of Soldier Nanotechnology at MIT, under contract DAAD  ... 
doi:10.1002/adma.201303456 pmid:24338738 pmcid:PMC4227607 fatcat:qtdt34dvhje4bmzpcvjhsxmz6q

The infrared polarizations of high-redshift radio galaxies [article]

Gareth Leyshon
1999 arXiv   pre-print
This thesis reports the K-band polarizations of a representative sample of nine radio galaxies: seven 3C objects at 0.7 < z < 1.3, and two other distinctive sources.  ...  There is strong evidence for polarization in the source as a whole (12%) and the brightest knot (5%). 3C 441 lies in a rich field; one of its companions appears to be 18% polarized.  ...  Our K-band image shows no evidence for extended structure, though this companion is clearly visible in the UKIRT K-band image of BLR-II, and also (clearly resolved as a separate object) in their HST image  ... 
arXiv:astro-ph/9910550v1 fatcat:yej4cdl3wbau7bqdybf2ctxsl4
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