Fig. B.1
Optical and near-IR images of the fields 2XMMp J030212.0-000133 (top panels), 2XMMp J084836.4+445345 (middle), and 2XMMp J084858.3+445158 (bottom). North is up, east is left, and both images cover the same region. Figures on the left side show SDSS DR6 images, while W1-band (3.4 μm) images from the AllWISE survey are on the right side. Blue dashed lines are the contours from the X-ray emission, but not at the same flux levels.
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