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 or USNO UJ Stars, 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¶
Doug Mink, SAO (dmink@cfa.harvard.edu)