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Figure 49: QFITS-out page of the same field (cont’d). The clickable plots show, from top left to bottom right,
the stellar-counts (left) derived from a blind selection of red sources shown on the right r h − magnitude plot.
The red line is the predictions of the Bahcall-Soneira model. The plot on the middle panel shows the amplitude
((a 2 − b 2 )/(a 2 + b 2 ) = length of lines) and the orientation (= orientation of lines) of the stellar ellipticity vectors
over the MegaCam field. The seelcted sources are the red points shown on the right r h − magnitude plot. The
plots at the bottom are the 2-dimensional (left) and 1-dimensional astrometric errors of sources with respect to the
2MASS catalogue. They are produced by running SCAMP in a simple diagnostic mode (-MATCH N -SOLVE_ASTROM N
-SOLVE_PHOTOM N).
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