Control Panel

Edit values + Enter / Update.
Drag red star on source plane to change centre.
Wheel on plot to zoom at cursor.

Backend: setup-lens-backend (FastAPI + PyAutoLens 2021.10.14.1, Docker python:3.8). Pages only hosts this file; compute via HTTPS. The Render address comes from the GitHub Actions Secret (injected at deploy time, no real address in code); the current selection is saved to localStorage.

Lens Mass EllPowerLaw (z=1.7)

elliptical_comps e_y

elliptical_comps e_x

einstein_radius (")

slope

External Shear

shear e_y (γ1)

shear e_x (γ2)

Source EllSersic (z=2.5579)

centre y (Dec ")

centre x (R.A. ")

elliptical_comps e_y

elliptical_comps e_x

intensity

effective_radius (")

sersic_index n

Redshift

redshift_l

redshift_s

Grid

static 300²@0.02" · drag 150²@0.04" · extent ±3.0"

Overlay (Same System)

critical curve (image)

caustics (source)

colorbar (m Jy/beam, off by default)

White edge + cyan/green = critical, white + orange/red = caustic

Radio Beam (Image Convolved)

Bmaj/Bmin=FWHM("), PA=N→E(°)
PA=0° N-S, 90° E-W, east=-x (left) θ=90+PA

Bmaj (")

Bmin (")

PA (°)

Show convolved (image)

kernel: elliptical Gaussian, σ=FWHM/2.355, 4σ radius

View Zoom (wheel)

Image:

Source:

Connecting to backend ...

PyAutoLens 2021.10.14.1 · backend Docker python:3.8 · frontend single index.html
critical/caustic same tracer+grid · star at source centre · Beam radio def.

Image Plane (lensed)

Source Plane (intrinsic) — drag red star / wheel

Axes: Δ R.A. ["] (x) vs Δ Dec. ["] (y), origin="upper" (row0=y_max) matching Array2D.native. Image extent from Array2D.extent, source adaptive from traced grid. Beam ellipse bottom-left (white, angle=90+PA).