Switches:
Arguments:
proj | Image projection |
csys | Coordinate system |
equinox | Coordinate system equinox |
naxis | Number of axes in the file |
naxis1 | Image width (in pixels) |
naxis2 | Image height |
naxis3 | Data cube depth (only if NAXIS > 2) |
naxis4 | Data cube fourth dimension (only if NAXIS > 3) |
crval1 | WCS reference coordinate for first axis |
crval2 | WCS reference coordinate for second axis |
crpix1 | Pixel value for reference coordinate |
crpix2 | |
cdelt1 | Pixel scale (degrees) |
cdelt2 | |
crota2 | Rotation of image (E of N) |
lonc | Sky coordinate of image center |
latc | |
ximgsize | Image size (degrees) |
yimgsize | |
rotequ | Rotation of image in Equatorial (J2000) |
rac | Equatorial (J2000) coordinates of image center |
decc | |
ra1 | Equatorial coordinates of four image corners |
dec1 | |
ra2 | |
dec2 | |
ra3 | |
dec3 | |
ra4 | |
dec4 |
and optionally
radius | Radius of pixel region (degrees) |
radpix | Radius in pixels |
npixel | Number of pixels in region |
nnull | Number of null pixels |
aveflux | Average flux for region |
rmsflux | RMS of region fluxes |
fluxref | Flux for reference location |
sigmaref | RMS of fluxes |
xref | Pixel coordinates of reference location |
yref | |
raref | Equatorial (J2000) coordinated of reference location |
decref | |
fluxmin | Same for pixel with minimum flux |
sigmamin | |
xmin | |
ymin | |
ramin | |
decmin | |
fluxmax | Same for pixel with maximum flux |
sigmamax | |
xmax | |
ymax | |
ramax | |
decmax |
If you specify region that is all blank, npixel will be zero, nnull will be the total number of pixel examined, and the flux related parameters will all be zero.
Examples:
Return Codes: