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Pulsar Searching + Receivers Matthew Bailes (CAASTRO), FPGAs: Peter Mc Mahon, Terry Fibila, Jonathon Kocz. CPUs: Willem van Straten, Andrew Jameson, Mike.

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Presentation on theme: "Pulsar Searching + Receivers Matthew Bailes (CAASTRO), FPGAs: Peter Mc Mahon, Terry Fibila, Jonathon Kocz. CPUs: Willem van Straten, Andrew Jameson, Mike."— Presentation transcript:

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

3 Vela Pulsar

4 Competition TelescopePoint SourceBlind Survey FoM Computational Complexity PKS MB 111 GBT 25x0.50.4 GMRT 1.7x~1315x [RAM = 327 TB] ASKAP 0.14x4.25x400,000x !!! {RAM=529PB} PALFA 162x5.5x0.5 MeerKAT-64 14.5x40x73,000 !! [RAM=351 TB] PKS WB PKS PAF 2.25x 0.25x (40K?-20K).25x ~1 ~4x 2x ~4x (no acc) ~64x (4x??) Molonglo 30x1 0.16x2.8x0.3x [RAM = 5TB] SKA 256 300x650x73,000 !! [RAM = 21TB]

5 HITRUN Pulsar Surveys (Keith et al. 2010) Digital Versions of the Parkes MB Surveys Digital Versions of the Parkes MB Surveys 13 x 1024 x 64 us 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 high-DM MSPs Better for Lorimer bursts Better for Lorimer bursts Better for RRATs Better for RRATs Deeper than old surveys Deeper than old surveys

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

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 M c ~ 0.001 M o P orb ~ 0.0907d D ~ 1.2 kpc?

11 MSP Luminosity Function (Levin et al.)

12

13

14 RAW Cleaned

15 Barsdell’s Heimdall Real-time RRAT Detector

16

17 BAD RFI EXAMPLE

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

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

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

21 Search SNR PSR flux

22 Computational complexity PSR flux

23 Competition TelescopePoint SourceBlind Survey FoM Computational Complexity PKS MB 111 GBT 25x0.50.4 GMRT 1.7x~1315x [RAM = 327 TB] ASKAP 0.14x4.25x400,000x !!! {RAM=529PB} PALFA 162x5.5x0.5 MeerKAT-64 14.5x40x73,000 !! [RAM=351 TB] PKS WB PKS PAF 2.25x 0.25x (40K?-20K).25x ~1 ~4x 2x ~4x (no acc) ~64x (4x??) Molonglo 30x1 0.16x2.8x0.3x [RAM = 5TB] SKA 256 300x650x73,000 !! [RAM = 21TB]

24 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?

25 1909-3744 8s dumps!

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


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