disk black body

   

 

with
and a temperature distribution of

 

dibb(1,2,3,4)
 

 

Note:This is a model for a geometrically thin, optically thick accretion disk. When fitting a black hole or a non-magnetized neutron star the inner radius should be fixed at , i.e. it is not a free parameter any more. In addition, the neutron star radius is then implicitly assumed to be km. When fitting a magnetized neutron star is a free parameter. However, the efficiency is fixed to independent of the run time value of [Shakura and Sunyaev1973].