Need to handle nans in elliptical photometry

[rfinn]

• seems like SourceCatalog automatically ignores nans, as documented here

• I think I could change this part, and make a mask that identifies the nans, and then add that to the boolmask

          if self.mask_flag:
              self.phot_table1 = aperture_photometry(self.image, ap, mask=self.boolmask)
              if self.image2_flag:
                  self.phot_table2 = aperture_photometry(self.image2, ap, mask=self.boolmask)
          else:
              # subpixel is the method used by Source Extractor
              self.phot_table1 = aperture_photometry(self.image, ap, method = 'subpixel', subpixels=5)
              if self.image2_flag:
                  self.phot_table2 = aperture_photometry(self.image2, ap, method = 'subpixel', subpixels=5)