A line emission from a relativistic accretion disk. See Fabian et al.,
MNRAS 238, 729. Setting par2 to 10 is the special case of the
accretion disk emissivity law ( ).
par1 = line energypar2 = power law depend. of emissivity (10 for disk)
par3 = inner radius (units of GM/c
)
par4 = outer radius (units of GM/c
)
par5 = inclination (degrees)
K = photons/cm
/s in the spectrum