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GalSimCat

GalSimCat

Survey Parameters

Survey

Pixel Scale

N(exp)

Median PSF FWHM

PSF Model

AB24 flux/exp.

Sky/pix/exp.

LSST-i

0.2"/pix

460

0.7"

Moffat beta=3

711

781

LSST-r

0.2"/pix

460

0.7"

Moffat beta=3

810

892

|| DES-i' || 0.26"/pix || 10 || 0.95" ||

Sky/pix/exp. = mean sky electrons per pixel in one exposure

AB24 flux/exp. = total electrons from a 24th AB magnitude source in one exposure

DES: see Table 3 in http://www.darkenergysurvey.org/survey/des-description.pdf, need to convert limiting magnitudes to AB24 flux values.

S/N defn? See help(galsim.noise.addNoiseSNR)

WL selection? Want very loose selection, then reject objects based on inferred galaxy properties to avoid psf ellipticity bias (more likely to select objects aligned with psf ellipticity).

What fraction of Neff could be achieved using only exposures with best 25% of seeing? (could prioritize CPU usage this way)

Use Kolmogorov PSF? YES

Truncate n=4 components!

Use size and bulge fraction params (like CFHTLens) instead of rbulge and rdisk?