Information


The Catalogs:

The catalog All systems contains all the strong lenses discovered in the COSMOS field.
The catalog Multiple Arc systems contains the systems where multiple images or long curved arcs are seen around the lensing galaxy. The systems correspond to the classification “ best systems” in Faure et al. 2008.
The catalog Single Arc Systems contains information about the strong lens candidates for which a single arclet is seen close to the lensing galaxy.
The New Systems! catalog refer to the systems discovered after October 2007.

Parameters in the catalogs:

ID : Name of the systems according to the identification given in Faure et al. 2007
RA : Right ascension in h:m:s J2000
DEC : Declination in deg: ':'' J2000
zl : Lensing galaxy redshift: in black: photometric redshift measured from 8 bands ( Mobasher et al. 2007 ). In red : spectroscopic redshift. 
rarc : Arc radius, corresponding to the distance between the lensing galaxy center and the brightest part of the arc or image, in arcseconds
Iab : Magnitude of the lensing galaxy in the ACS/F184w band 
More : Link to the individual page 

Parameters in the individual pages:

- Title: Name of the systems according to the identification given in Faure et al. 2007
Id: Object identification in the COSMOS photometric catalog 
RA: Right ascension in deg (from the COSMOS catalog)
DEC: Declination in deg (from the COSMOS catalog)
z: Redshift of the lens (with error bars at 68% if it is a photometric redshift, Mobasher et al. 2007 ). In red, spectroscopic redshift (VIMOS or FORS).
zs: Source redshift
Arc radius: Distance between the lensing galaxy center and the most distant arc, measured in the brightest part of the arc.

- Morphology: Parameters measured with Gim2d 
Effective radius: effective radius of the lensing galaxy bulge in arcseconds
Sérsic profile index: index of the sersic profile for the lensing galaxy bulge

- Lensing: only for multiple image systems, parameters derived using LensTool 
Multiplicity: Number of images of a source
Velocity dispersion SIE: Velocity dispersion of the lensing galaxy when modelled with a Singular Isothermal Elliptical mass profile
External shear: value and position angle (measured North to East) of an external shear contribution (if necessary in the modelling)
Einstein radius: Einstein radius of the lens derived from the velocity dispersion
Download the lenstool files!: with this link you have access to the mod.par and to the gal.dat and image.cat necessary to run lenstool to optimize the lens potential of this system
- Photometry: AB magnitudes in the different bands (Capak et al. 2007).. The photometry of the arc is calculated for the brightest image in case of multiple image systems
- Stamp images: link to download the images of the lens in fits format