Pulsation frequencies of HD 144277 where data from 2009 are pointed upwards and data from 2010 are pointed downwards. Top panel: pulsation frequency spectra. (Errors in frequency are not visible because they are as small as the thickness of the lines.) Bottom panel: zoom into the amplitude spectrum from 62.5 to 65.5 d^-1 ilustrating the higher frequency resolution of the 2010 data and the actual frequency quadruplet around 63.8 d^-1.