wcstools(1)

Name
wcstools - Programs to access image world coordinate systems and catalogs

Setting an Image World Coordinate System

imwcs
    Automatically find stars in a FITS or IRAF image, match them to HST Guide USNO A, B, UCAC or UJ Stars, or others, compute the relation between sky coordinates and image coordinates, and write in in the image header. [after U of Iowa SETWCS]

delwcs
    Delete the WCS keywords from an image. If both EPOCH and EQUINOX are present, EQUINOX is also deleted.

Using an Image World Coordinate System

imcat
    List catalog sources which should be found in the area of the sky covered by a specific image.

imsize
    Print center and size of image using WCS keywords in header

imstar
    Find and list the n brightest stars in an IRAF or FITS image, with their sky coordinates if there is WCS information in the image header.

sky2xy
    Print image pixel coordinates for given sky coordinates on the command line or in a list file.

xy2sky
    Print sky coordinates for given image pixel coordinates on the command line or in a list file.

Catalog Utility Programs

scat
    Search the HST GSC, USNO-A2.0, or other catalog given a region on the sky.

skycoor
    Convert between J2000, B1950, and Galactic coordinates from the command line or a file.

Image Utility Programs

addpix
    Add a constant value(s) to specified pixel(s)

edhead
    Edit the header of a FITS file or the user parameters of an IRAF image file using a the text editor specified by the EDITOR environment variable.

gethead
    Return values for keyword(s) specified after filename.

getpix
    Return value(s) of specified pixel(s)

i2f Read two-dimensional IRAF image file and write FITS image file

imhead
    Print FITS or IRAF header

imrot
    Rotate and/or reflect FITS or IRAF image files

setpix
    Set specified pixel(s) to specified value(s)

sethead
    Set header parameters in FITS or IRAF images.

subpix
    Subtract a constant value(s) from specified pixel(s)

Author
Jessica Mink, SAO (jmink@cfa.harvard.edu)