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Table 1.

Galaxy parameters of the fiducial experiments.

Parameter Distribution
Shear components g1, g2 𝒰(−0.1, 0.1)
Intrinsic galaxy ellipticity modulus εtrue ℛ(0.2)[0,0.6]
Sérsic indexan 𝒰(1.0, 4.0)
Half-light radius R (pix) 𝒰(2.0, 8.0)
Surface brightness S (pix−2) 𝒰(1.0, 15.0)

Notes.

We use 𝒰(a, b) to denote the uniform distribution between a and b, and ℛ(σ) for a Rayleigh distribution with mode σ. Intervals in subscript denote the range to which we clip a distribution, so that no sample falls outside of the given interval.

(a)

In practice, we grid the values for the Sérsic index instead of drawing them from a continuous distribution. This significantly speeds up the galaxy stamp generation, as GalSim can reuse cached Sérsic profiles.

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