Distribution of archival Chandra observations (black diamonds), archival XMM-Newton observations (blue squares), XMM-Newton AO10 observations (blue diamonds), and XMM-Newton AO13 observations (red circles) for the full Stripe 82 region (top) and the XMM-Newton AO13 area (bottom). The symbol size is to scale with the field of view for the AO13 pointings in the bottom panel only.