SIMBAD references

We report on a visual search for galaxy-scale strong gravitational lenses over 650 arcmin² of HST ACS (V₆₀₆ and I₈₁₄) imaging in the DEEP2 Extended Groth Strip. This field has Keck DEIMOS spectroscopy of ∼14,000 galaxies (∼75% complete to R_AB<24.1). We identify three strong galaxy-galaxy lenses: HST J141735+522646 is a previously known four-image lens (the ``Cross''; z<sub>l</sub>=0.8106, z<sub>s</sub>=3.40); HST J141820+523611 (the ``Dewdrop''; z_l=0.5798, z_s=0.9818) features two pairs of arcs; and HST J141833+524352 (the ``Anchor''; z_l=0.4625, no z_s) has one pair of arcs. Based on a normalized local density (1+δ₃), lenses are found to be in both under- and overdense local environments. All three lenses are fit well by singular isothermal ellipsoid models including external shear, with χ²_ν∼1. The model shears are ∼10%. Approximating all line-of-sight galaxies as singular isothermal sphere halos truncated at 200 h^–1 kpc, with masses estimated through the Faber-Jackson relation, infers shears of ∼2%, much smaller than those required by the models. Therefore, the corresponding convergence estimates must also be suspect. If more realistic treatment of galaxies (and the large-scale structure that they are embedded in) were to match the inferred shears to the model shears, then the true convergence could be measured and the mass-sheet degeneracy broken.