Hello, I would like to use a point source model in SCIMG with the SMODEL adverb. The SCIMG helpfile says: SMODEL(2) = X offset in sky (arcsec) SMODEL(3) = Y offset in sky (arcsec) Does this mean that these are defined in the same way as the SHIFT adverb? So SMODEL(2)=cos(Dec_0)*(RA-RA_0) and SMODEL(3)=Dec-Dec_0? Is this correct? Kind regards, Hanno Spreeuw.