| badpixels | str | Bad pixel mask (FITS image or ASCII coord list) | | |
| constraints | str | File with parameter constraints (ASCII file) | | |
| constraints_list | GalFitConstraint | List of GalFitConstraints objects | pixel | |
| conv_x | int | Size of the convolution box (x y) | pixel | |
| conv_y | int | Size of the convolution box (x y) | pixel | |
| data | str | Input data image (FITS file) | | |
| display | str | Display type (regular, curses, both) | | |
| fit_xmax | int | Region within cutout defined by region_* where Galfit will perform fit | | |
| fit_xmin | int | Region within cutout defined by region_* where Galfit will perform fit | | |
| fit_ymax | int | Region within cutout defined by region_* where Galfit will perform fit | | |
| fit_ymin | int | Region within cutout defined by region_* where Galfit will perform fit | | |
| interactive | int | Modify/create objects interactively | | |
| mask_type | str | Switch to use Sourcelist or Segmentation image for masking neighbours (sourcelist, segmentation) | | |
| model | str | Output data image block | | |
| no_fit | int | Create output only? (1=yes, 0=optimize) | | |
| pixelscale_x | float | Plate scale (dx dy) | arcsec / pixel | |
| pixelscale_y | float | Plate scale (dx dy) | arcsec / pixel | |
| psf | str | Input PSF image and (optional) diffusion kernel | | |
| region_xmax | int | Image region to cut out and run Galfit on | pixel | |
| region_xmin | int | Image region to cut out and run Galfit on | pixel | |
| region_ymax | int | Image region to cut out and run Galfit on | pixel | |
| region_ymin | int | Image region to cut out and run Galfit on | pixel | |
| sigma | str | Sigma image name (made from data if blank or "none") | | |
| subsampling | float | PSF fine sampling factor relative to data | | |
| zeropoint | float | Photometric zeropoint | mag | arith.zp |
