Update Object topic

Author: Myzhar

README.md

@@ -39,13 +39,13 @@ Open a terminal, clone the repository, update the dependencies and build the pac
   $ source ~/.bashrc
 ```
 
-*Note*: If rosdep is missing you can install it with:
+**Note**: If rosdep is missing you can install it with:
 
 `$ sudo apt-get install python-rosdep python-rosinstall-generator python-vcstool python-rosinstall build-essential`
 
 'Note': The option '--symlink-install' is very important, it allows to use symlinks instead of copying files to the ROS2 folders during the installation, where possible. Each package in ROS2 must be installed and all the files used by the nodes must be copied into the installation folders. Using symlinks allows you to modify them in your workspace, reflecting the modification during the next executions without the needing to issue a new colcon build command. This is true only for all the files that don't need to be compiled (Python scripts, configurations, etc.).
 
-*Note*: If you are using a different console interface like zsh, you have to change the `source` command as follows: `echo source $(pwd)/install/local_setup.zsh >> ~/.zshrc and source ~/.zshrc`.
+**Note**: If you are using a different console interface like zsh, you have to change the `source` command as follows: `echo source $(pwd)/install/local_setup.zsh >> ~/.zshrc and source ~/.zshrc`.
 
 ## Custom Topics
 

images/.gitkeep

@@ -19,6 +19,9 @@ float32[6] position_covariance
 # Object velocity
 float32[3] velocity
 
+bool tracking_available
+
+# Tracking available
 # Tracking state
 # 0 -> OFF (object not valid)
 # 1 -> OK