Index: /trunk/doc/pslib/psLibSDRS_Astrom.tex
===================================================================
--- /trunk/doc/pslib/psLibSDRS_Astrom.tex	(revision 1516)
+++ /trunk/doc/pslib/psLibSDRS_Astrom.tex	(revision 1517)
@@ -460,9 +460,11 @@
 
 \begin{verbatim}
-psPlane *psCoordFPAToTP(psPlane *out, const psPlane *in, const psFPA *fpa);
+psPlane *psCoordFPAToTP(psPlane *out, const psPlane *in, float color, float mag, const psFPA *fpa);
 \end{verbatim}
 which converts coordinates \code{in} on the specified focal plane
 \code{fpa} to tangent plane coordinates, applying the appropriate
-distortion terms.
+distortion terms.  The \code{color} and magnitude (\code{mag}) of the
+source is necessary in order to perform the distortion between the
+focal plane and the tangent plane.
 
 \begin{verbatim}
@@ -480,5 +482,5 @@
 
 \begin{verbatim}
-psSphere *psCoordCellToSky(psSphere *out, const psPlane *in, const psCell *cell);
+psSphere *psCoordCellToSky(psSphere *out, const psPlane *in, float color, float mag, const psCell *cell);
 \end{verbatim}
 which converts coordinates on the specified cell to (RA,Dec).  This
@@ -488,5 +490,7 @@
 transformations is available in the \code{.parent} elements of
 \code{psCell} and \code{psChip}, and the \code{psFPA.exposure}
-element.
+element.  The \code{color} and magnitude (\code{mag}) of the source is
+necessary in order to perform the distortion between the focal plane
+and the tangent plane.
 
 \begin{verbatim}
@@ -510,7 +514,10 @@
 
 \begin{verbatim}
-psPlane *psCoordTPToFPA(psPlane *out, const psPlane *in, const psFPA *fpa);
-\end{verbatim}
-which converts the tangent plane coordinates \code{in} to focal plane coordinates.
+psPlane *psCoordTPToFPA(psPlane *out, const psPlane *in, float color, float mag, const psFPA *fpa);
+\end{verbatim}
+which converts the tangent plane coordinates \code{in} to focal plane
+coordinates.  The \code{color} and magnitude (\code{mag}) of the
+source is necessary in order to perform the distortion between the
+focal plane and the tangent plane.
 
 \begin{verbatim}
@@ -533,9 +540,11 @@
 
 \begin{verbatim}
-psPlane *psCoordSkyToCell(psPlane *out, const psSphere *in, psCell *cell);
+psPlane *psCoordSkyToCell(psPlane *out, const psSphere *in, float color, float mag, psCell *cell);
 \end{verbatim}
 which directly converts (RA,Dec) \code{in} to coordinates on the
 specified cell.  The specified cell need not contain the input
-coordinates.
+coordinates.  The \code{color} and magnitude (\code{mag}) of the
+source is necessary in order to perform the distortion between the
+focal plane and the tangent plane.
 
 \begin{verbatim}