diff --git a/src/GW/RG0W0.f90 b/src/GW/RG0W0.f90
index d55cb46..4bee006 100644
--- a/src/GW/RG0W0.f90
+++ b/src/GW/RG0W0.f90
@@ -146,6 +146,10 @@ subroutine RG0W0(dotest,doACFDT,exchange_kernel,doXBS,dophBSE,dophBSE2,TDA_W,TDA
 
   end if
 
+! Cumulant expansion
+
+  call RGWC(dotest,nBas,nC,nO,nR,nS,Om,rho,eHF,eGW,Z)
+
 ! call GW_plot_self_energy(nBas,nC,nO,nV,nR,nS,eHF,eHF,Om,rho)
 
 ! Compute the RPA correlation energy
@@ -159,9 +163,7 @@ subroutine RG0W0(dotest,doACFDT,exchange_kernel,doXBS,dophBSE,dophBSE2,TDA_W,TDA
 ! Dump results !
 !--------------!
 
-  call print_RG0W0(nBas,nO,eHF,ENuc,ERHF,SigC,Z,eGW,EcRPA,EcGM)
-
-  call RGWC(dotest,nBas,eGW,Z)
+! call print_RG0W0(nBas,nO,eHF,ENuc,ERHF,SigC,Z,eGW,EcRPA,EcGM)
 
 ! Perform BSE calculation
 
diff --git a/src/GW/RGWC.f90 b/src/GW/RGWC.f90
index 37ed75f..4988c6b 100644
--- a/src/GW/RGWC.f90
+++ b/src/GW/RGWC.f90
@@ -1,4 +1,4 @@
-subroutine RGWC(dotest,nBas,eGW,Z)
+subroutine RGWC(dotest,nBas,nC,nO,nR,nS,Om,rho,e,eGW,Z)
 
 ! Perform GW+C calculation
 
@@ -10,16 +10,27 @@ subroutine RGWC(dotest,nBas,eGW,Z)
   logical,intent(in)            :: dotest
 
   integer,intent(in)            :: nBas
+  integer,intent(in)            :: nC
+  integer,intent(in)            :: nO
+  integer,intent(in)            :: nR
+  integer,intent(in)            :: nS
 
+  double precision,intent(in)   :: Om(nS)
+  double precision,intent(in)   :: rho(nBas,nBas,nS)
+  double precision,intent(in)   :: e(nBas)
   double precision,intent(in)   :: eGW(nBas)
   double precision,intent(in)   :: Z(nBas)
 
 ! Local variables
 
-  integer                       :: p
+  integer                       :: p,q,i,a,m
+  integer                       :: iSat
+  double precision,parameter    :: cutoff = 1d-3
 
-  double precision,allocatable  :: eGWC(:)
+  double precision,allocatable  :: de(:,:,:)
   double precision,allocatable  :: ZC(:)
+  double precision,allocatable  :: ZSat(:,:)
+  double precision,allocatable  :: eSat(:,:)
 
 ! Output variables
 
@@ -33,15 +44,41 @@ subroutine RGWC(dotest,nBas,eGW,Z)
 
 ! Memory allocation
 
-  allocate(eGWC(nBas),ZC(nBas))
+  allocate(ZC(nBas),eSat(nBas,nS),ZSat(nBas,nS))
+
+! Useful quantities
+
+  allocate(de(nBas,nBas,nS))
+
+  do p=nC+1,nBas-nR
+    do i=nC+1,nO  
+      do m=1,nS
+        de(p,i,m) = eGW(p) - eGW(i) + Om(m)
+      end do
+    end do
+  end do
+
+  do p=nC+1,nBas-nR
+    do a=nO+1,nBas-nR
+      do m=1,nS
+        de(p,a,m) = eGW(p) - eGW(a) - Om(m)
+      end do
+    end do
+  end do
 
 ! GW+C weights
 
-  ZC(:) = exp(1d0 - 1d0/Z(:))
+  ZC(:) = 0d0
 
-! GW+C quasiparticles
+  do p=nC+1,nBas-nR
+    do q=nC+1,nBas-nR
+      do m=1,nS
+        ZC(p) = ZC(p) + 2d0*rho(p,q,m)**2/de(p,q,m)**2
+      end do
+    end do
+  end do
 
-  eGWC(:) = eGW(:)
+  ZC(:) = exp(-ZC(:))
 
 ! Dump results
 
@@ -49,17 +86,75 @@ subroutine RGWC(dotest,nBas,eGW,Z)
   write(*,*)' GW+C calculation '
   write(*,*)'-------------------------------------------------------------------------------'
   write(*,'(1X,A1,1X,A3,1X,A1,1X,A15,1X,A1,1X,A15,1X,A1,1X,A15,1X,A1,1X,A15,1X,A1,1X)') &
-            '|','#','|','e_GW (eV)','|','e_GW+C (eV)','|','Z','|','ZC','|'
+            '|','#','|','e_GW (eV)','|','e_GW+C (eV)','|','Z_GW','|','Z_GW+C','|'
   write(*,*)'-------------------------------------------------------------------------------'
 
   do p=1,nBas
     write(*,'(1X,A1,1X,I3,1X,A1,1X,F15.6,1X,A1,1X,F15.6,1X,A1,1X,F15.6,1X,A1,1X,F15.6,1X,A1,1X)') &
-    '|',p,'|',eGW(p)*HaToeV,'|',eGWC(p)*HaToeV,'|',Z(p),'|',ZC(p),'|'
+    '|',p,'|',eGW(p)*HaToeV,'|',eGW(p)*HaToeV,'|',Z(p),'|',ZC(p),'|'
   end do
 
   write(*,*)'-------------------------------------------------------------------------------'
   write(*,*)
 
+! GW+C satellites on hole branch
+
+  ZSat(:,:) = 0d0
+  do i=nC+1,nO
+    do m=1,nS
+      eSat(i,m) = eGW(i) - Om(m)
+      do q=nC+1,nBas-nR
+        ZSat(i,m) = ZSat(i,m) + ZC(i)*2d0*rho(i,q,m)**2/de(i,q,m)**2
+      end do
+    end do
+  end do
+
+  write(*,*)'-------------------------------------------------------------------------------'
+  write(*,*)' Satellite series from GW+C on hole branch'
+  write(*,*)'-------------------------------------------------------------------------------'
+  write(*,'(1X,A5,1X,A5,1X,A5,1X,A15,1X,A15,1X)') '#','i','m','e_Sat (eV)','Z_Sat'
+
+  write(*,*)'-------------------------------------------------------------------------------'
+  iSat = 0
+  do i=nC+1,nO
+    do m=1,nS
+      iSat = iSat + 1
+      if(ZSat(i,m) > cutoff) &
+        write(*,'(1X,I5,1X,I5,1X,I5,F15.6,1X,F15.6,1X)') iSat,i,m,eSat(i,m)*HaToeV,ZSat(i,m)
+    end do
+  end do
+  write(*,*)'-------------------------------------------------------------------------------'
+  write(*,*)
+
+! GW+C satellites on electron branch
+
+  ZSat(:,:) = 0d0
+  do a=nO+1,nBas-nR
+    do m=1,nS
+      eSat(a,m) = eGW(a) + Om(m)
+      do q=nC+1,nBas-nR
+        ZSat(a,m) = ZSat(a,m) + ZC(a)*2d0*rho(a,q,m)**2/de(a,q,m)**2
+      end do
+    end do
+  end do
+
+  write(*,*)'-------------------------------------------------------------------------------'
+  write(*,*)' Satellite series from GW+C on electron branch'
+  write(*,*)'-------------------------------------------------------------------------------'
+  write(*,'(1X,A5,1X,A5,1X,A5,1X,A15,1X,A15,1X)') '#','a','m','e_Sat (eV)','Z_Sat'
+
+  write(*,*)'-------------------------------------------------------------------------------'
+  iSat = 0
+  do a=nO+1,nBas-nR
+    do m=1,nS
+      iSat = iSat + 1
+      if(ZSat(a,m) > cutoff) &
+        write(*,'(1X,I5,1X,I5,1X,I5,F15.6,1X,F15.6,1X)') iSat,a,m,eSat(a,m)*HaToeV,ZSat(a,m)
+    end do
+  end do
+  write(*,*)'-------------------------------------------------------------------------------'
+  write(*,*)
+
 ! Testing zone
 
 ! if(dotest) then