(Optional) a FITS table containing columns RA and DEC, plus (if witherrors=`yes') either columns RA_ERR and DEC_ERR or a single column RADEC_ERR. The angles in these columns should be in decimal degrees, except for RADEC_ERR, which should be in arcseconds. All data types may be either REAL32 or REAL64. This file is only required if datastyle=`set'.