Add option to make a Box PDF a livetime PDF, used for simulation.

flarestack/core/time_pdf.py

@@ -352,6 +352,15 @@ def __init__(self, t_pdf_dict, season):
             self.pre_window -= self.offset
             self.post_window += self.offset
 
+        try:
+            if self.t_dict["livetime"] is True:
+                logging.debug("Using time PDF as a detector livetime PDF.")
+                self.mjd_to_livetime = lambda x: x - self.sig_t0([])
+                self.livetime_to_mjd = lambda x: x + self.sig_t0([])
+                # print(self.t1, self.t0, self.livetime, self.livetime_to_mjd(7.), self.pre_window, self.sig_t0([]))
+        except KeyError:
+            pass
+
     def sig_t0(self, source):
         """Calculates the starting time for the window, equal to the
         source reference time in MJD minus the length of the pre-reference-time
@@ -434,7 +443,6 @@ def effective_injection_time(self, source=None):
         t0 = self.mjd_to_livetime(self.sig_t0(source))
         t1 = self.mjd_to_livetime(self.sig_t1(source))
         time = (t1 - t0) * 60 * 60 * 24
-
         return max(time, 0.)
 
     def raw_injection_time(self, source):