Comparison of the Lyα halo detection for 3 representative objects from the deeper udf-10 data cube and the shallower mosaic data cube. From top to bottom rows show objects #180, #168, and #149, respectively. Left and middle panels: Lyα NB images constructed from the udf-10 and mosaic data cubes, respectively. The black contours show the 10^-18.5 SB level for the two images. Right panels: comparison of the radial SB profiles measured on the Lyα NB images (data points) and from the modelled Lyα images (lines) in the udf-10 data cube (in colour) and the mosaic data cube (in black). The black dotted line shows the rescaled radial SB of the UV continuum. The best-fit halo scale lengths from the two data cubes are indicated in the upper right corner of each panel.