Comments on "Thermodynamics and/of horizons : A comparison of   Schwarzschild, Rindler and de Sitter spacetimes" (ArXiv : gr-qc/0202078), by   T.Padmanabhan
  We show in this note that the Padmanabhan expression $E = a/2$ for the energy of the Schwarzschild and de Sitter spacetimes (a - the horizon radius) is also valid for the Rindler horizon, using an analogy with the electrostatic case. 
Hristu Culetu