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/*****************************************************************************/
/* xfunct.h */
/*****************************************************************************/
#ifndef __XFUNCT_H_INCLUDED
#define __XFUNCT_H_INCLUDED 1
/*****************************************************************************/
/* eccentric_offset_q(), eccentric_offset_p():
These functions calculate the components of the eccentric offset
vector. The eccentric offset vector (q,p) is e*(cos E,sin E) where
e^2 = k^2 + h^2 and E is the solution of E - e*sin E = lambda-arg(k,h). */
double eccentric_offset_q(double lambda,double k,double h);
double eccentric_offset_p(double lambda,double k,double h);
double eccentric_trigonometric_c(double lambda,double k,double h);
double eccentric_trigonometric_s(double lambda,double k,double h);
/*****************************************************************************/
double elliptic_complete_first(double k);
double elliptic_complete_second(double k);
double elliptic_complete_third(double n,double k);
/*****************************************************************************/
/* wrapper to get_heiocentric_julian_date(): */
double get_hjd(double jd,double ra,double dec);
/* wrapper to get_barycentric_julian_date(): */
double get_bjd(double jd,double ra,double dec);
/*****************************************************************************/
#endif
/*****************************************************************************/
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