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Pulsar Searching + Receivers

Pulsar Searching + Receivers. Matthew Bailes (CAASTRO), FPGAs: Peter Mc Mahon, Terry Fibila, Jonathon Kocz. CPUs: Willem van Straten, Andrew Jameson , Mike Keith GPUs: Ben Barsdell + HITRUN team (Science! & Search coding). Crab pulsar. Pulsars go this way.

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Pulsar Searching + Receivers

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  1. Pulsar Searching+ Receivers Matthew Bailes (CAASTRO), FPGAs: Peter Mc Mahon, Terry Fibila, Jonathon Kocz. CPUs: Willem van Straten, Andrew Jameson, Mike Keith GPUs: Ben Barsdell + HITRUN team (Science! & Search coding)

  2. Crab pulsar Pulsars go this way Magnetic Field - Period Diagram “Noisy” “Smooth”

  3. Vela Pulsar

  4. Competition

  5. HITRUN Pulsar Surveys (Keith et al. 2010) • Digital Versions of the Parkes MB Surveys • 13 x 1024 x 64 us • Medium-Latitude Survey (540s) • Ultra-deep Survey (4000s) • All-sky Survey (260s) • Better for high-DM MSPs • Better for Lorimer bursts • Better for RRATs • Deeper than old surveys

  6. Berkeley-Parkes-Swinburne-Recorder“BPSR” Dedicated fibre 5 TB/day

  7. Bandpasses

  8. MSPs • HITRUN: 27 MSPs • P-ALFA: 15 MSPs? • MSP with a main sequence companion • (PSR J1903+0327)? • FERMI-Related: ~50MSPs • Mostly short-period and many close • GBT Drift 350 MHz: >6 MSPs?? • MSP occasionally super-bright

  9. Precision Timing:PSR J1017-7156

  10. A Jupiter-mass “Planet” Pulsar Mc~ 0.001 Mo Porb~ 0.0907d D ~ 1.2 kpc?

  11. MSP Luminosity Function (Levin et al.)

  12. RAW Cleaned

  13. Barsdell’s Heimdall Real-time RRAT Detector

  14. Barsdell’s Heimdall Real-time RRAT Detector

  15. BAD RFI EXAMPLE

  16. Dan Thornton (U Manchester)DM >> Lorimer Burst ! Well off galactic plane. One beam Only Instrumentation Perfect Allows detailed studies

  17. In future capable of finding in real time Heimdall plot of Thornton’s burst.

  18. Burst Profile ~50 sigma Scatter Tail (nu^-4.0(4) Freq index -2.000(6)

  19. Search SNR PSR flux

  20. Computational complexity PSR flux

  21. Competition

  22. Conclusions • Wideband feed complements the MB: • Good for point sources • Good for follow-ups • Limited RFI excision? Parallel system? • PAF: • Tsys/Aeff critical: 2x MB (marginal) 1x MB (excellent) • MultiBeam: • Currently #1 instrument for PSR and Burst surveys • RFI excision should be mirrored on PAFs?

  23. 1909-3744 8s dumps!

  24. Peryton Examples (Burke-Spolaor et al) Ugly, Fat.

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