Flexion measurement in MAB's simulations

[martinkilbinger]

Flexion measurements

Testing

Script to retrieve shear and flexion measurements, create fg and bg catalogues, and perform test measurements is
flexion_create_cats.py.

#35

Works with commit c2fe4cb

[martinkilbinger]

Reproducing plots from earlier, in candide:~/astro/Runs/flexion/simuls_MAB/reproduce_previous.

[martinkilbinger]

Setting:

• Foreground = 500 largest kappa values
• bg 0.5 < z
• no bg downsampling (n = 517 / arcmin2)

[martinkilbinger]

Setting:

• Foreground = 500 largest kappa values
• bg 0.5 < z
• bg n = 60 / arcmin2

[martinkilbinger]

Setting:

• 765 fg clusters: M > 10^13 M_sol, 0.1 <= z <= 0.5
• bg 0.6 < z
• bg no downsampling (n = 517 / arcmin2)

[martinkilbinger]

Setting:

• 765 fg clusters M > 10^13 M_sol, 0.1 <= z <= 0.5
• bg 0.6 < z
• bg nominal Euclid density n = 30 / arcmin2

[martinkilbinger]

With Euclid-like noise.

No noise:

With noise, σe = 0.26, σF = σG = 0.04 / arcmin2 (Goldberg & Bacon 2005), maybe too optimistic:

Setting:

• 765 fg clusters M > 10^13 M_sol, 0.1 <= z <= 0.5
• bg 0.6 < z
• bg 2x nominal Euclid density n = 60 / arcmin2

[martinkilbinger]

Next steps:

• Check Jackknife covariance
• Compute SNR
• Explore noise
• Get cluster profiles in WDM simulations
• Estimate cluster masses