| 72 | 72 | Here is a comparison of the PSFmags from the cmf files of four adjacent (arbitrarily chosen) MD07 stacks with SDSS model mags (r,g,i and z, as labelled). Blue indicates an object flagged as a star by SDSS. I haven't rejected any images flagged as defective in any way, so this probably explains the blue points offset by 2 mags. UPDATE: looks like these offset points are stars with masked centres - note that there are brighter stars which are not masked. Is this the 'removing intermediate brightness stars as cosmic rays' problem again? It appears particularly bad on r cells 40 and 52. |
