More PSD fixes.

Author: transientlunatic

minke/injection.py

@@ -63,14 +63,16 @@ def make_injection(
         injection = data + waveform.project(detector)
         injection.channel = channel_n
 
+        duration = injection.times[-1] - injection.times[0]
+        
         print("length of injection", len(injection.data))
-        print("duration of injection", (injection.times[-1] - injection.times[0]))
+        print("duration of injection", (duration))
 
         if psdfile:
             # Write the PSD file to an ascii file
             filename = f"{detector.abbreviation}_{psdfile}.dat"
             psd_model.to_file(filename, upper_frequency=sample_rate/2,
-                              lower_frequency=0, df=1/sample_rate)
+                              lower_frequency=0, df=1./duration)
 
 
         if framefile: