added masked array again as it was removed in a merge
added masked array again as it was removed in a merge

albireox/marvin,bretthandrews/marvin,bretthandrews/marvin,sdss/marvin,sdss/marvin,albireox/marvin,sdss/marvin,sdss/marvin,albireox/marvin,bretthandrews/marvin,bretthandrews/marvin,albireox/marvin