diff --git a/src/ctselect/ctselect.hpp b/src/ctselect/ctselect.hpp
index 172bf25..326b84d 100644
--- a/src/ctselect/ctselect.hpp
+++ b/src/ctselect/ctselect.hpp
@@ -56,11 +56,12 @@ public:
     ctselect& operator=(const ctselect& app);
 
     // Methods
-    void                 clear(void);
-    void                 execute(void);
-    void                 run(void);
-    void                 save(void);
-    const GObservations& obs(void) const;
+    void                  clear(void);
+    void                  execute(void);
+    void                  run(void);
+    void                  save(void);
+    const GObservations&  obs(void) const;
+    const GTimeReference& time_reference(void) const;
 
 protected:
     // Protected methods
@@ -113,4 +114,16 @@ const GObservations& ctselect::obs(void) const
     return m_obs;
 }
 
+
+/***********************************************************************//**
+ * @brief Return CTA time reference
+ *
+ * @return CTA time reference
+ ***************************************************************************/
+inline
+const GTimeReference& ctselect::time_reference(void) const
+{
+    return m_cta_ref;
+}
+
 #endif /* CTSELECT_HPP */