Upper panel: precise radial velocities obtained with the Tull Coude Spectrograph at the 2.7 m Harlan J. Smith Telescope (HJST) of the McDonald Observatory (filled circles) and with the HIRES spectrograph at the 10 m Keck telescope (stars). We show some circular orbits for a Jupiter-mass planet at 1 AU (long dashed line), 1.5 AU (dotted line) and 3 AU (solid line). Lower panel: average of three short (3-min) consecutive observations taken with HIRES/Keck during four nights in January 2012. Some circular orbits due to hypothetical Neptune-mass (solid line), Saturn-mass (dotted line) and Jupiter-mass (dashed line) planets at 0.04 AU, are shown for comparison. No giant planets have been detected so far in the inner regions (<3 AU) around HIP 56948.