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-rw-r--r--src/likelihood.h10
1 files changed, 9 insertions, 1 deletions
diff --git a/src/likelihood.h b/src/likelihood.h
index 0da7db9..5efc8ef 100644
--- a/src/likelihood.h
+++ b/src/likelihood.h
@@ -18,7 +18,15 @@
* value for n. */
#define MIN_RATIO -10
-#define CHARGE_FRACTION 60000.0
+/* Roughly equal to the fraction of light which is reflected at each PMT.
+ *
+ * Note: The proper thing to do here would be to separately integrate over the
+ * track to calculate the amount of reflected light using the data from the
+ * PMTR bank. However, this would make the likelihood function almost twice as
+ * long, so we just assume a constant fraction of the light is reflected now. */
+#define CHARGE_FRACTION 0.3
+
+/* Dark rate of the PMTs (Hz) */
#define DARK_RATE 500.0
/* Single PE transit time spread (ns). */
#define PMT_TTS 1.5