Pulsar Sounds

All sound files were made with Matlab using two methods: smoothing of the time series (.wav) or magnification in the Fourier domain and then smoothing of the resulting modified time series (FFT.wav). In the case of B1937+21, only magnification in the Fourier domain was used due to the pulsar's very short period.

This means that .wav files are closer to the actual raw data and what the telescope "hears".

 Profile (from EPN) Name Sounds Comments B0531+21 (The Crab) P = 0.033 s B0531+21_430MHz.wav B0531+21_430MHz_FFT.wav B0531+21_1170MHz.wav B0531+21_1170MHz_FFT.wav The Crab pulsar emits giant pulses, which are easily audible in the .wav files. The FFT.wav files bring out the periodic emission. B0540+23 P = 0.246 s B0540+23_ALFA_FFT.wav A weaker pulsar, you can just hear its "thumping" amid the noise. B1933+16 P = 0.359 s B1933+16_ALFA.wav One of the brightest known pulsars--every pulse is audible. B1937+21 (Original MSP) P = 0.00156 s B1937+21_1475MHz.wav B1937+21_1475MHz_FFT.wav Because of its extremely short period, this pulsar is audible as a tone. Can you discern the same tone in both sound files? B2020+28 P = 0.343 s B2020+28_1475MHz.wav B2020+28_1475MHz_RFI.wav B2020+28_1475MHz_FFT.wav A bright pulsar, most individual pulses are audible. There is also some RFI near the end of the second sound file. XTE1810-19 (magnetar) P = 5.5 s XTE1810-19_GBT.wav The magnetar that also emits radio waves! Can you distinguish the "thump" of the magnetar from the "bzzzt,bzzzt" of the RFI? Punta Salinas Radar P = 6 s Punta_Salinas_Radar_ALFA.wav The arch-nemesis of Arecibo observers. Can you hear the Doppler shift?