FUNCTION loss_rad, EM, T

   ;EM is emission measure in 10^49 cm^-3
   ; Radiative loss rate = EM * 1.e49 * 6.e-22 / SQRT(T/1.e5) erg s^-1
   ;Cox & Tucker (1969)

   RETURN, EM * 6.e27 / SQRT(T/1.e5)
END