Image 7: Residuals of the best-fit model using: g1+bgnd
The residual image of the best-fitting two-dimensional gaussian plus constant model. The source is obviously more complex than this description: an excess in the core is visible as well as spatially-correlated residuals (e.g. regions of positive or negative pixels) at larger scales.
![[Image 7: Residuals of the best-fit model using: g1+bgnd]](initial-resid.gif)