Prevent topics in custom node from being prefixed by node name

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I wrote out a custom PID position controller for a turtlebot. Basically, it sends velocity to command for the straight-line path to a target. I'm having an annoying issue, though. Every topic that the controller subscribes to gets prefixed by the node name in ROS. The name of my node is "BotPID," as is the name of my class. The following three lines are contained in the constructor:

poseSubscriber = nh_private.subscribe("goal/pose", 10,&BotPID::poseCallback,this);
poseDesiredSubscriber = nh_private.subscribe("robot/pose", 10, &BotPID::poseDesiredCallback,this);
//advertise twist publisher
twistPublisher = nh_private.advertise<geometry_msgs::Twist>("cmd_vel_mux/input/teleop", 10);

Annoyingly, when I run the node, the following topics show up in ROS:

/BotPID/robot/pose
/BotPID/cmd_vel_mux/input/teleop
/BotPID/goal/pose

Is there any way in my node to prevent these topics from being prefixed by the node name without adding a "/" before the name of the file?