diff --git a/inst/cta/src/GCTACubeBackground.cpp b/inst/cta/src/GCTACubeBackground.cpp
index 5fb5d64..78da8fa 100644
--- a/inst/cta/src/GCTACubeBackground.cpp
+++ b/inst/cta/src/GCTACubeBackground.cpp
@@ -293,8 +293,11 @@ void GCTACubeBackground::fill(const GObservations& obs, GLog* log)
         // Skip observation if it's not CTA
         if (cta == NULL) {
             if (log != NULL) {
-                *log << "Warning: Skipping "+obs[i]->instrument()+" observation ";
-                *log << "\"" << obs[i]->name() << "\"" <<std::endl;
+                *log << "Skipping ";
+                *log << obs[i]->instrument();
+                *log << " observation ";
+                *log << "\"" << obs[i]->name() << "\"";
+                *log << " (id=" << obs[i]->id() << ")" << std::endl;
             }
             continue;
         }
@@ -302,12 +305,24 @@ void GCTACubeBackground::fill(const GObservations& obs, GLog* log)
         // Skip observation if we have a binned observation
         if (cta->eventtype() == "CountsCube") {
             if (log != NULL) {
-                *log << "Warning: Skipping binned observation ";
-                *log << "\"" << cta->name() << "\"" <<std::endl;
+                *log << "Skipping binned ";
+                *log << cta->instrument();
+                *log << " observation ";
+                *log << "\"" << cta->name() << "\"";
+                *log << " (id=" << cta->id() << ")" << std::endl;
             }
             continue;
         }
 
+        // Announce observation usage
+        if (log != NULL) {
+            *log << "Including ";
+            *log << cta->instrument();
+            *log << " observation \"" << cta->name();
+            *log << "\" (id=" << cta->id() << ")";
+            *log << " in background cube computation." << std::endl;
+        }
+
         // Extract region of interest from CTA observation
         GCTARoi roi = cta->roi();
 
diff --git a/inst/cta/src/GCTACubeExposure.cpp b/inst/cta/src/GCTACubeExposure.cpp
index e42ba67..be2aeeb 100644
--- a/inst/cta/src/GCTACubeExposure.cpp
+++ b/inst/cta/src/GCTACubeExposure.cpp
@@ -389,8 +389,11 @@ void GCTACubeExposure::fill(const GObservations& obs, GLog* log)
         // Skip observation if it's not CTA
         if (cta == NULL) {
             if (log != NULL) {
-                *log << "Warning: Skipping "+obs[i]->instrument()+" observation ";
-                *log << "\"" << obs[i]->name() << "\"" <<std::endl;
+                *log << "Skipping ";
+                *log << obs[i]->instrument();
+                *log << " observation ";
+                *log << "\"" << obs[i]->name() << "\"";
+                *log << " (id=" << obs[i]->id() << ")" << std::endl;
             }
             continue;
         }
@@ -398,8 +401,11 @@ void GCTACubeExposure::fill(const GObservations& obs, GLog* log)
         // Skip observation if we have a binned observation
         if (cta->eventtype() == "CountsCube") {
             if (log != NULL) {
-                *log << "Warning: Skipping binned observation ";
-                *log << "\"" << cta->name() << "\"" <<std::endl;
+                *log << "Skipping binned ";
+                *log << cta->instrument();
+                *log << " observation ";
+                *log << "\"" << cta->name() << "\"";
+                *log << " (id=" << cta->id() << ")" << std::endl;
             }
             continue;
         }
@@ -414,11 +420,24 @@ void GCTACubeExposure::fill(const GObservations& obs, GLog* log)
         // Skip observation if we don't have an unbinned observation
         if (rsp == NULL) {
             if (log != NULL) {
-                *log << "Warning: Observation \"" << cta->name();
-                *log << "\" contains no IRF response." <<std::endl;
+                *log << "WARNING: ";
+                *log << cta->instrument();
+                *log << " observation \"" << cta->name();
+                *log << "\" (id=" << cta->id() << ")";
+                *log << " contains no IRF response.";
+                *log << " Skipping this observation." << std::endl;
             }
             continue;
         }
+
+        // Announce observation usage
+        if (log != NULL) {
+            *log << "Including ";
+            *log << cta->instrument();
+            *log << " observation \"" << cta->name();
+            *log << "\" (id=" << cta->id() << ")";
+            *log << " in exposure cube computation." << std::endl;
+        }
             
         // Loop over all pixels in sky map
         for (int pixel = 0; pixel < m_cube.npix(); ++pixel) {
diff --git a/inst/cta/src/GCTACubePsf.cpp b/inst/cta/src/GCTACubePsf.cpp
index 79a46ad..4804195 100644
--- a/inst/cta/src/GCTACubePsf.cpp
+++ b/inst/cta/src/GCTACubePsf.cpp
@@ -454,8 +454,11 @@ void GCTACubePsf::fill(const GObservations& obs, GLog* log)
         // Skip observation if it's not CTA
         if (cta == NULL) {
             if (log != NULL) {
-                *log << "Warning: Skipping "+obs[i]->instrument()+" observation ";
-                *log << "\"" << obs[i]->name() << "\"" <<std::endl;
+                *log << "Skipping ";
+                *log << obs[i]->instrument();
+                *log << " observation ";
+                *log << "\"" << obs[i]->name() << "\"";
+                *log << " (id=" << obs[i]->id() << ")" << std::endl;
             }
             continue;
         }
@@ -463,8 +466,11 @@ void GCTACubePsf::fill(const GObservations& obs, GLog* log)
         // Skip observation if we have a binned observation
         if (cta->eventtype() == "CountsCube") {
             if (log != NULL) {
-                *log << "Warning: Skipping binned observation ";
-                *log << "\"" << cta->name() << "\"" <<std::endl;
+                *log << "Skipping binned ";
+                *log << cta->instrument();
+                *log << " observation ";
+                *log << "\"" << cta->name() << "\"";
+                *log << " (id=" << cta->id() << ")" << std::endl;
             }
             continue;
         }
@@ -479,12 +485,25 @@ void GCTACubePsf::fill(const GObservations& obs, GLog* log)
         // Skip observation if we don't have an unbinned observation
         if (rsp == NULL) {
             if (log != NULL) {
-                *log << "Warning: Observation \"" << cta->name();
-                *log << "\" contains no IRF response." <<std::endl;
+                *log << "WARNING: ";
+                *log << cta->instrument();
+                *log << " observation \"" << cta->name();
+                *log << "\" (id=" << cta->id() << ")";
+                *log << " contains no IRF response.";
+                *log << " Skipping this observation." << std::endl;
             }
             continue;
         }
 
+        // Announce observation usage
+        if (log != NULL) {
+            *log << "Including ";
+            *log << cta->instrument();
+            *log << " observation \"" << cta->name();
+            *log << "\" (id=" << cta->id() << ")";
+            *log << " in point spread function cube computation." << std::endl;
+        }
+
         // Loop over all pixels in sky map
         for (int pixel = 0; pixel < m_cube.npix(); ++pixel) {