Index: trunk/FACT++/spectrum/data.sql
===================================================================
--- trunk/FACT++/spectrum/data.sql	(revision 19914)
+++ trunk/FACT++/spectrum/data.sql	(revision 19915)
@@ -1,3 +1,4 @@
 SELECT
+   -- Convert variable to bin index
    INTERVAL(Theta, %107:theta)  AS `.theta`,
    INTERVAL(LogEnergyEst, %108:sparse)  AS  `.sparse_est`,
@@ -7,5 +8,5 @@
    COUNT(IF(Weight<0, 1, NULL))  AS  `Background`,
 
-   -- Average Energy
+   -- Average Energy: SumEnergyEst/SumW
    SUM(Weight*POW(10, LogEnergyEst))  AS  SumEnergyEst,
    SUM(Weight)                        AS  SumW
Index: trunk/FACT++/spectrum/simulation.sql
===================================================================
--- trunk/FACT++/spectrum/simulation.sql	(revision 19914)
+++ trunk/FACT++/spectrum/simulation.sql	(revision 19915)
@@ -3,4 +3,6 @@
    SELECT
       Weight, Energy, LogEnergyEst,
+
+      -- Convert variable to bin index
       INTERVAL(Theta, %107:theta)  AS `.theta`,
       INTERVAL(LogEnergyEst, %108:sparse)  AS `.sparse_est`,
@@ -38,5 +40,5 @@
 */
 
-   -- Binning in estimated energy: Signal, Background, Excess
+   -- Binning in estimated energy: Signal, Background
    SUM(  IF(Weight>0,        ZdWeight*SpectralWeight,    0))  AS  SignalW,
    SUM(  IF(Weight<0,        ZdWeight*SpectralWeight,    0))  AS  BackgroundW,
@@ -44,8 +46,9 @@
    SUM(  IF(Weight<0, POW(ErrZdWeight*SpectralWeight,2), 0))  AS  BackgroundW2,
 
-   -- Energy Estimation
+   -- Energy Estimation: Bias=ResidualW/SignalW; Resolution=sigma(Bias)
    SUM(IF(Weight>0,     Residual*   ZdWeight*SpectralWeight, 0))  AS  ResidualW,
    SUM(IF(Weight>0, POW(Residual,2)*ZdWeight*SpectralWeight, 0))  AS  ResidualW2,
 
+   -- Average Energy: SumEnergyX/SignalW
    SUM(IF(Weight>0, Energy               *ZdWeight*SpectralWeight, 0))  AS  SumEnergySimW,
    SUM(IF(Weight>0, POW(10, LogEnergyEst)*ZdWeight*SpectralWeight, 0))  AS  SumEnergyEstW
Index: trunk/FACT++/spectrum/summary-est.sql
===================================================================
--- trunk/FACT++/spectrum/summary-est.sql	(revision 19914)
+++ trunk/FACT++/spectrum/summary-est.sql	(revision 19915)
@@ -11,6 +11,6 @@
    SELECT
       *,
-      (POW(10,hi)-POW(10,lo))/1000  AS  Width,
-      Area*ObsTime                  AS  AreaTime
+      (POW(10,hi)-POW(10,lo))/1000  AS  Width,    -- Bin Windth in TeV
+      Area*ObsTime                  AS  AreaTime  -- Total scale dA*dT
    FROM
       BinningEnergy_%100:binning
Index: trunk/FACT++/spectrum/summary-sim.sql
===================================================================
--- trunk/FACT++/spectrum/summary-sim.sql	(revision 19914)
+++ trunk/FACT++/spectrum/summary-sim.sql	(revision 19915)
@@ -11,6 +11,6 @@
    SELECT
       *,
-      (%103:binwidth)  AS  Width,
-      Area*ObsTime  AS  AreaTime
+      (%103:binwidth)  AS  Width,   -- Bin Windth in TeV or just 1
+      Area*ObsTime  AS  AreaTime    -- Total scale dA*dT
    FROM
       %101:binning