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We report joint Lagrangian velocity and temperature measurements in turbulentthermal convection. Measurements are performed using an improved version(extended autonomy) of the neutrally-buoyant instrumented particle that wasused by to performed experiments in a parallelepipedic Rayleigh-Benard cell.The temperature signal is obtained from a RFtransmitter. Simultaneously, wedetermine particle's position and velocity with one camera, which grants accessto the Lagrangian heat flux. Due to the extended autonomy of the presentparticle, we obtain well converged temperature and velocity statistics, as wellas pseudo-eulerian maps of velocity and heat flux. Present experimental resultshave also been compared with the results obtained by a corresponding campaignof Direct Numerical Simulations and Lagrangian Tracking of massless tracers.The comparison between experimental and numerical results show the accuracy andreliability of our experimental measurements. Finally, the analysis oflagrangian velocity and temperature frequency spectra is shown and discussed.In particular, we observe that temperature spectra exhibit an anomalous f^2.5frequency scaling, likely representing the ubiquitous passive and active scalarbehavior of temperature

Simultaneous temperature and velocity Lagrangian measurements in turbulent thermal convection