Cheshire Cat 3 layers 2 nfw all images model

In this blog, I will present glafic-generated model, using 3 layers ( 2 for nfw halo and 1 for all cluster members inc. BCGs). In this model, all images previously identified were used.

i.e. these lensed images are used

In this model, the ratio of BCGs velocity dispersion is proportional to all other cluster members.

Result:

In this model, 2 nfw located:

Left NFW: 1.5 arcsec right of left BCG ellipticity : 0.141

Right NFW: 0.5 arcsec left of right BCG ellipticity : 0.318

Mass : 50% higher for left NFW than right NFW

redshift for E,G,Z are determined by glafic.

E: z=2.2905 ( in 5 layers model it was 2.2813)

G: z=2.2288 . ( it was 2.2688)

Z : z=1.3252 ( it was 1.3555)

There is a small improvement of the model: mean source dispersion reduced by 5 %

Average source dispersion in this model is : 0.0385 arcsec , reduced from 5 layers model of 0.0407 arcsec.

Delens-relens result for each of the lensed systems are similar. Results are as follows:

Critical curve:

A1:

A2:

A3:

There's an additional image top right of A4 predicted very near the BCG:

from imfit residual (used 2 sersic model for BCG) , there's indeed a dim image there.

Coordinates:

[25,50] is likely to be counterimage of E,

[50,50] is A4

[75,50] is likely the predicted image

For B:

B1:

B2:

B3a:

B3b:

These delens-relens result suggests 2 knots near the lower left ( but top left corner of B1 image) is a counter image of system B pairs.

However, multiple knots on B1 have similar SED, it is not possible to tell which lensed image correspond to which with SED only. But with model prediction, the confidence is higher.

system C:

C1a

C1b:

C2a:

C2b:

* with these model prediction, C2g is likely counter image of C2a&C2b

C3:

Model also predict a very dim counterimage near right BCG.

However, due to possible interaction between BCG and the interacting cluster member next to it. I am not certain whether the positive residual near [100,75] is the counterimage of C