NAME: wrref PURPOSE: (one line only) Write a astrometry support (.ref) file. DESCRIPTION: CATEGORY: File I/O CALLING SEQUENCE: wrref,file,ref,error INPUTS: file - Name of file to be written ref - Anonymous structure that contains the information read from file. Tags in structure always provided: objrad - object aperture radius (pixels) nstars - Number of stars in the list Tags needed if nstars > 0 xpos - float, X position of star ypos - float, Y position of star fwhm - float, FWHM of object (pixels) mag - float, instrumental magnitude of star err - float, uncertainty on magnitude sig_max - float, DN value of peak pixel in image ra - double, RA of star (radians) dec - double, Dec of star (radians) catmag - float, Catalog magnitude for star OPTIONAL INPUT PARAMETERS: KEYWORD INPUT PARAMETERS: OUTPUTS: error - Flag, if set indicates there was a problem writing the file. KEYWORD OUTPUT PARAMETERS: COMMON BLOCKS: SIDE EFFECTS: RESTRICTIONS: PROCEDURE: MODIFICATION HISTORY: Written 2008/10/31 by Marc W. Buie, Southwest Research Institute. 2009/07/29, MWB, explicit cast of data to make sure file contains the correct type of data.