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4PSR

4PSR. A Brief Discussion of APSR & 4-bit Observing. APSR. (A)TNF (P)arkes (S)winburne (R)ecorder 8-bit sampling capabilities (CPSR2: 2-bit) Up to 1GHz bandwidth (CPSR2: 128MHz) Use the Pulsar Digital Filterbank as a front-end Estimated completion: late 2007. 4-bit Observing The Good.

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4PSR

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  1. 4PSR A Brief Discussion ofAPSR & 4-bit Observing

  2. APSR • (A)TNF (P)arkes (S)winburne (R)ecorder • 8-bit sampling capabilities (CPSR2: 2-bit) • Up to 1GHz bandwidth (CPSR2: 128MHz) • Use the Pulsar Digital Filterbank as a front-end • Estimated completion: late 2007

  3. 4-bit ObservingThe Good • Higher fidelity signal • Good for polarimetry • Pulsar emission physics • Possibility of exciting new discoveries! • Instructions are documented

  4. 4-bit Observing The NotSoGood • Half the bandwidth of 2-bit mode (64 MHz) • Fiddly • Change cables • Change mode in software • Slower processing • Need to stitch together single polarisations

  5. 2 bit vs. 4 bit

  6. J0437 Stokes Navarro, J. et al. 1997

  7. Ragnetar - XTE J1810-197

  8. http://www.atnf.csiro.au/research/pulsar/observing/4bit

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