Figure \ref{fig:DopplerFit} shows our raw data (blue) and Gaussian fits (red) for the four transitions in study. The first graph in the figure shows the Doppler broadened profiles corresponding to the \(5^{2}S_{1/2}\) F=3 ground state to the \(5^{2}P_{3/2}\) state transition of \(^{85}Rb\) and \(5^{2}S_{1/2}\) F=2 ground state to the \(5^{2}P_{3/2}\) state transition of \(^{87}Rb\), the second graph shows the \(5^{2}S_{1/2}\) F=2 ground state to the \(5^{2}P_{3/2}\) state transition of \(^{85}Rb\), and the third shows the \(5^{2}S_{1/2}\) F=3 ground state to the \(5^{2}P_{3/2}\) state transition of \(^{87}Rb\). Each Gaussian fit can be used to estimate the temperature of the vapor cell. We expect the fit to be larger than room temperature since, as described in the Introduction, the line profile is a complicated convolution between 6 Gaussian and 6 Lorenztian profiles.