Fig. 13
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(l, b) plots of a field of 1 square degree centered on (l = 350°, b = 0°) for stars with 11.0 < [8.0] < 11.99 (top) and 12.0 < [8.0] < 12.99 (bottom). The empty areas are conspicuous and large in both diagrams. Yet there remains a significant area without extinction effects and in these areas the number density in the fainter diagram is considerably lower.
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