| ANALYSIS_THRESH | float | Threshold at which CLASS_STAR and FWHM_ operate | mag / arcsec^2 |
| BACK_FILTERSIZE | int | Size of background-filtering mask | background mesh |
| BACK_SIZE | int | Size of a background mesh | pixel |
| BACK_TYPE | str | The type of background subtracted from the images (AUTO, MANUAL) | |
| BACK_VALUE | float | The constant value to be subtracted from the images if BACK_TYPE is MANUAL | |
| BACKPHOTO_THICK | int | Thickness of the background LOCAL annulus | pixel |
| BACKPHOTO_TYPE | str | Background used to compute magnitudes (GLOBAL, LOCAL) | |
| CATALOG_NAME | str | Name of the output catalog | |
| CATALOG_TYPE | str | Format of the output catalog (ASCII, ASCII_HEAD, ASCII_SKYCAT, ASCII_VOTABLE, FITS_1.0, FITS_LDAC) | |
| CHECKIMAGE_NAME | str | Filename for the check-image | |
| CHECKIMAGE_TYPE | str | Type of information to put in the check-image (NONE, IDENTICAL, BACKGROUND, BACKGROUND_RMS, MINIBACKGROUND, MINIBACK_RMS, -BACKGROUND, FILTERED, OBJECTS, -OBJECTS, APERTURES, SEGMENTATION) | |
| CLEAN | str | Clean the catalog before writing to disk (Y, N) | |
| CLEAN_PARAM | float | Efficiency of cleaning | |
| DEBLEND_MINCONT | float | Minimum contrast parameter for deblending | |
| DEBLEND_NTHRESH | int | Number of deblending sub-thresholds | |
| DETECT_MINAREA | int | Minimum number of pixels above threshold triggering detection | pixel |
| DETECT_THRESH | float | Detection threshold relative to background RMS (when THRESH_TYPE is RELATIVE) | |
| DETECT_TYPE | str | Type of device that produced the image (CCD, PHOTO) | |
| FILTER | str | Apply filtering to the data before extraction (Y, N) | |
| FILTER_NAME | str | Name of file contianing the filter definition | |
| FLAG_IMAGE | str | filename of the flag-image | |
| FLAG_TYPE | str | Combination method for flags on the same object (OR, AND, MIN, MAX, MOST) | |
| GAIN | float | Conversion factor used for error estimates of CCD magnitudes | e^- / ADU |
| MAG_GAMMA | float | Gamma of the emulsion (when DETECT_TYPE is PHOTO) | |
| MAG_ZEROPOINT | float | Zero-point offset to be applied to magnitudes | mag |
| MASK_TYPE | str | Method of masking of neighbors for photometry (NONE, BLANK, CORRECT) | |
| MEMORY_BUFSIZE | int | Number of scan-lines in the image buffer | |
| MEMORY_OBJSTACK | int | Maximum number of objects that the object-stack can contain | |
| MEMORY_PIXSTACK | int | Maximum number of pixels that the pixel-stack can contain | |
| PARAMETERS_NAME | str | Name of the file containing the list of parameters that will be computed and put into the catalog for each object | |
| PHOT_APERTURES | int | MAG_APER aperture diameter | pixel |
| PHOT_AUTOAPERS | float | MAG_AUTO minimum circular aperture diameters (estimation disk, measurement disk) | |
| PHOT_AUTOPARAMS | float | MAG_AUTO controls (scaling parameter k of the first order moment and minimum R_min in units of A and B) | |
| PIXEL_SCALE | float | Pixel size | arcsec / pixel |
| SATUR_LEVEL | float | Pixel value above which it is considered saturated (in applicable units) | |
| SEEING_FWHM | float | FWHM of stellar sources (for star/galaxy separation only) | arcsec |
| STARNNW_NAME | str | Name of the file containing the neural-network weights for star/galaxy separation | |
| THRESH_TYPE | str | Meaning of DETECT_THRESH and ANALYSIS_THRESH parameters (RELATIVE, ABSOLUTE) | |
| VERBOSE_TYPE | str | Verbosity level (QUIET, NORMAL, EXTRA_WARNINGS, FULL) | |
| WEIGHT_IMAGE | str | Filename of the detection and measurement weight-image | |
| WEIGHT_TYPE | str | Weighting scheme for weight-image (NONE, BACKGROUND, MAP_RMS, MAP_VAR, MAP_WEIGHT) | |
