Gravitational Lensing Size Scales for Quasars

Understand

We review results from our monitoring observations of several lensed quasars performed in the optical, UV, and X-ray bands.

• Modeling of the multi-wavelength light curves provides constraints on the extent of the optical, UV, and X-ray emission regions.
• One of the important results of our analysis is that the optical sizes as inferred from the microlensing analysis are significantly larger than those predicted by the theoretical-thin-disk estimate.
• In a few cases we also constrain the slope of the size-wavelength relation.