Source shape model¶

Under this identifier are defined the parameters that define a source shape.

s_center_x -- s_center_y -- s_sigx -- s_sigy -- s_angle -- s_mag -- index -- z -- id

List of parameters¶

s_center_x float¶

Position along the X axis for the center of the source in arcsec. The reference point for this range is the barycenter of sources is attached to a system of multiple images, or the reference point defined in the .par file if not.

s_center_y float¶

Position along the Y axis for the center of the source in arcsec. The reference point for this range is the barycenter of sources is attached to a system of multiple images, or the reference point defined in the .par file if not.

s_sigx float¶

Value of the size of the major axis in arcsec

s_sigy float¶

Value of the size of the minor axis in arcsec

s_angle float¶

Value of the orientation of the ellipse defining the source. The angle is defined anti-clockwise from west to north axis.

s_mag float¶

Value of theunlensed magnitude of the source

index float¶

Value of the Sersic index n for sources modeled with Sersic profile.

z float¶

Redshift of the source.

id string¶

Identifier of the source.

type int¶

Surface brightness density type

• 1: Velocity field $I(r)=sign(y)$ $I_0$ $\sqrt{|y|}$
• 2: Exponential disk $I(r)=I_0$ $\exp(-r)$
• 3: 2D Gaussian $I(r)=I_g$ $\exp(-0.5\,r^2)$
• 4: Sersic $I(r)=I_0$ $\exp(-r^{1/n})$
• 5: Uniform disk within radius $I(r)=I_0$ for $r<a\ b$

with $I_0=10^{-0.4\,({\rm s_{mag}}-26)}$ and $I_g = 10^{-0.4\,({\rm s_{mag}}+48.57)+29}$