Atlas Image source centroid - WPhot positions: cryo vs post-cryo

Tiles examined below:

     tileID     a.k.a.
  -----------------------
    0349m046    XMM      
    0523m273    CDFS  
    1497p015    COSMOS   
    2425p545    ELAIS N1   
  -----------------------

  * tb21 => Atlas Images from post-cryo (v5-test) processed frames
  * ab41 => Atlas Images from cryo (v4) processed frames

W1 Tiles (Left: cryo; Right: post-cryo)

W2 Tiles (Left: cryo; Right: post-cryo)