HST 16309+8230

Observed	HST Model	MLE Model	Residual	Lensed source	Filter
					F814W i5.m0
					F606W v3.m0
					F450W b7.m0

HST 16309+8230 is an arc in the same field as HST 16302+8230.
The lensing elliptical galaxy has an apparent (V-I) color 1.4 mag and (B-V)=2.2 mag.
The significantly distorted lensed source is an extended edge-on disk-like galaxy with color (V-I)=1.4 mag, and (B-V)=0.4 mag.
The impact radius is 0".5.
The image magnification is about 0.9 magnitudes.
The model gives a good fit with a normalized chi² close to unity.

Name	HST 16309+8230
Equatorial(J2000)	16:30:52.7		+82:30:12		PA_V3=353^o.22
HST WFPC2	GROTH GTO-PAR:6254 1996-Jun-06
Dataset[g][x,y]	U2OVBT03T[3][061,575]
MDS Field:id lens galaxy	urg01:0010
HST WFPC2 Filter	F814W		F606W		F450W
Exposure seconds	5 x 1100		3 x 900		7 x 1157
log (integrated S/N Ratio)	3.52		3.20		2.60
Fitted Parameter	MLE	+/- rms	MLE	+/- rms	MLE	+/- rms
Sky Mag. (arcsec²)	21.912	0.003	22.385	0.003	23.107	0.005
Total Mag of lens galaxy	20.16	0.01	21.58	0.02	23.75	0.11
X centroid 0".1 Pix	61.54	0.01	61.36	0.01	61.54	0.07
Y centroid 0".1 Pix	573.76	0.01	574.05	0.01	574.18	0.06
Half-light radius	0".619	0".009	0".746	0".018	0".656	0".083
Orientation of light	48^o.1	0^o.4	47^o.3	0^o.7	51^o.8	4^o.2
Axis Ratio of the light	0.36	0.01	0.37	0.01	0.40	0.07
Mag. of lensed source	22.96	0.04	24.40	0.07	24.76	0.06
Source X offset 0".1 Pix	- 0.74	0.06	- 0.34	0.07	- 0.10	0.16
Source Y offset 0".1 Pix	4.99	0.08	5.07	0.07	4.87	0.11
Critical Radius	0".380	0".006	0".468	0".004	0".397	0".012
Axis Ratio Lens mass	0.82	0.04	0.43	0.03	0.82	Fixed
Lens Orientation	30^o.3	114^o.6	4^o.9	1^o.7	31^o.5	Fixed
Source half-light	0".477	0".021	0".421	0".032	0".477	Fixed
Source Orientation	- 75^o.9	1^o.0	- 75^o.1	1^o.9	- 75^o.9	Fixed
Source Axis-Ratio	0.24	0.02	0.21	0.03	0.24	Fixed

Lens galaxy from MDS-Pipeline fit