Spectroscopic Gravitational Lensing and Limits on the Dark Matter Substructure in Q2237+0305

R. B. Metcalf, L. A. Moustakas, A. J. Bunker +1

Spatially resolved spectroscopic data from the CIRPASS integral field unit (IFU) on Gemini are used to measure the gravitational lensing of the 4-image quasar Q2237+0305 on differe…