function pl_phs_crv, phs, F0, F1
;+
; NAME:
;	pl_phs_crv
;
; PURPOSE:
;	Returns a sinusoidal planetary phase curve for a planet in 
; 	a circular orbit
;
; CATEGORY:
;	Astrophysics
;
; CALLING SEQUENCE:
;
;	pl_phs_crv = pl_phs_crv(phs, F0, F1)
;
; INPUTS:
;	phs: 	orbital phase (0 = mid-transit, 0.5 = mid-eclipse)
;	F0/F1:	phase curve = F0 - F1*cos(2*!pi*phs)
;	
; OUTPUTS:
;	planetary phase curve
;
; MODIFICATION HISTORY:
; 	2012 Sep 21 -- Written by Brian Jackson (decaelus@gmail.com)
;-

  ret = F0 - F1*cos(2.*!pi*phs)

  return, ret

end;function