MOCASSIN 2.02 manual
If one needs to account for light travel time effects, for example if the source luminosity is changing, then this keyword will cause the results in SED.out to be integrated only over grid cells lying between ellipsoids corresponding to light travel times of
real2 are in light days, and
real1 must be less than
real2. The ellipsoids open out along the z-axis, and so one should also specify
inclination 1 0.0 -1 in
input.in when using this keyword. A review of the geometries of light echoes can be found in Sugerman, 2003, AJ, 126, 1939, and a case of MOCASSIN modelling including light travel time considerations is described by Wesson et al, 2010, MNRAS, 403, 474.
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