diff --git a/pylot/core/pick/autopick.py b/pylot/core/pick/autopick.py
index 485cc664..168cf5d8 100644
--- a/pylot/core/pick/autopick.py
+++ b/pylot/core/pick/autopick.py
@@ -244,12 +244,15 @@ def autopickstation(wfstream, pickparam, verbose=False,
                     # get first P and S onsets from arrivals list
                     arrP, estFirstP = min([(arr, arr.time) for arr in phases['P']], key = lambda t: t[1])
                     arrS, estFirstS = min([(arr, arr.time) for arr in phases['S']], key = lambda t: t[1])
-                    print('autopick: estimated first arrivals for P: {}, S:{} using TauPy'.format(estFirstP, estFirstS))
+                    print('autopick: estimated first arrivals for P: {} s, S:{} s after event'
+                          ' origin time using TauPy'.format(estFirstP, estFirstS))
 
                     # modifiy pstart and pstop relative to estimated first P arrival (relative to station time axis)
-                    pstart += (source_origin.time + estFirstP) - wfstart
-                    pstop += (source_origin.time + estFirstP) - wfstart
+                    pstart += (source_origin.time + estFirstP) - zdat[0].stats.starttime
+                    pstop += (source_origin.time + estFirstP) - zdat[0].stats.starttime
                     Lc = pstop - pstart
+                    print('autopick: CF calculation times respectively:'
+                          ' pstart: {} s, pstop: {} s'.format(pstart, pstop))
                 else:
                     print('No source origins given!')
 
@@ -580,7 +583,7 @@ def autopickstation(wfstream, pickparam, verbose=False,
                                aictsmoothS, fig=fig)
         ###############################################################
         # go on with processing if AIC onset passes quality control
-        slope = aicpick.getSlope()
+        slope = aicarhpick.getSlope()
         if not slope:
             slope = 0
         if (slope >= minAICSslope and
diff --git a/pylot/core/pick/picker.py b/pylot/core/pick/picker.py
index 2497f792..676ad681 100644
--- a/pylot/core/pick/picker.py
+++ b/pylot/core/pick/picker.py
@@ -243,7 +243,7 @@ class AICPicker(AutoPicker):
             # find maximum within slope determination window
             # 'cause slope should be calculated up to first local minimum only!
             imax = np.argmax(self.Data[0].data[islope])
-            iislope = islope[0][0:imax]
+            iislope = islope[0][0:imax+1]
             if len(iislope) <= 2:
                 # calculate slope from initial onset to maximum of AIC function
                 print("AICPicker: Not enough data samples left for slope calculation!")
@@ -271,7 +271,7 @@ class AICPicker(AutoPicker):
                             raw_input()
                             plt.close(fig)
                     return
-                iislope = islope[0][0:imax]
+                iislope = islope[0][0:imax+1]
             dataslope = self.Data[0].data[iislope]
             # calculate slope as polynomal fit of order 1
             xslope = np.arange(0, len(dataslope), 1)
@@ -280,7 +280,7 @@ class AICPicker(AutoPicker):
             if datafit[0] >= datafit[len(datafit) - 1]:
                 print('AICPicker: Negative slope, bad onset skipped!')
                 return
-            self.slope = 1 / tslope * (datafit[len(dataslope) - 1] - datafit[0])
+            self.slope = 1 / len(dataslope) * (datafit[len(dataslope) - 1] - datafit[0])
 
         else:
             self.SNR = None