q2u

salter.q2u(q1, q2)

Convert the two parameter quadratic terms of the Kipping 2013 limb- darkening parameterization q_1 and q_2 to the standard linear and quadratic terms of the quadratic limb-darkening parameterization of Claret et al. 2013 – called u_1 and u_2 in Kipping 2013 or a and b in Claret et al. 2013:

http://adsabs.harvard.edu/abs/2013A%26A…552A..16C

Parameters:

q1 : float

First component of Kipping 2013 quadratic limb-darkening

q2 : float

Second component of Kipping 2013 quadratic limb-darkening

Returns:

(u1, u2) : tuple of floats

Claret et al. (2013) style quadratic limb-darkening parameters