Presentation is loading. Please wait.

Presentation is loading. Please wait.

Improving Pulsar Timing

Published byAllison Byrd Modified over 6 years ago

Similar presentations

Presentation on theme: "Improving Pulsar Timing"— Presentation transcript:

1 Improving Pulsar Timing
Willem van Straten George Hobbs, Rick Jenet

2 Why? Gravitational Wave detection/sensitivity
MSPs binary system dynamics Astrometry: Solar System Ephemeris Earth Wobble Terrestrial Time Timing Noise (incl. glitches)

3 EPTA (Effelsberg/ Westerbork/ Jodrell Bank) ~30 115 MHz – 8GHz ~1us
Observatory Number of pulsars Observing span (yr) System Observing frequency Rms Jodrell Bank ~600 0-35 FB MHz >10us Parkes msps 15 ~10 CD 1.4GHz, 3GHz >100ns Parkes young 114 1.4GHz PPTA 20 2 CD/DFB/CORR 600MHz, 1.4/3 GHz Arecibo 7 ~20 0.4/1.4/2.4GHz >200ns Greenbank EPTA (Effelsberg/ Westerbork/ Jodrell Bank) ~30 115 MHz – 8GHz ~1us Nancay ~1.4GHz ~500ns Urumqi 284 10 1.5GHz >100us Hartebeesthoek 30 1.6/2.3GHz GMRT 1 ( ) FB/CD 325/610 MHz G. Hobbs

4 How? Precision (Noise) Software/Modeling Accuracy (Systematics)
Numerical Precision Arrival Time Estimation Time Standard Precision (Noise) Polarimetric Calibration Interstellar Scintillation Earth Wobble Accuracy (Systematics) RFI Mitigation Solar System Ephemeris Solar Wind Earth Atmosphere DM Variation Clock Correction Time/Freq Resolution Sensitivity Hardware/Instrumentation

5 Modelling Software (tempo2)
Clock Corrections Physical Delays: Solar System Ephemeris (incl. Shapiro delay) Earth Wobble precession & nutation (40ns) polar motion (60ns) Atmospheric Delays troposphere (20ns) ionosphere (1ns)

6

7 RFI mitigation using an adaptive filter
Kesteven et al. (2004)

8 Interstellar Scintillation
Figure 1, Walker & Stinebring (2005)

9 Arrival Time Estimation
Frequency domain (Taylor 1992) Multi-component Gaussian (Kramer et al. 1994) Invariant interval (Britton et al. 2000) Full polarization (van Straten 2004) Time vs. frequency domain (Hotan et al. 2005) Higher order moments (Jenet & Hobbs 2005)

10 Full Polarization TOA Useful for timing? (Kramer et al. 1999)
Stokes Q, U, V often sharper than Stokes I Useful for timing? (Kramer et al. 1999)

11 PSR J

12 PSR J

13 PSR B

14 PSR J

15 Formalism van Straten (2004)

16 Simulation Position Angle of Linear Polarization:
Gaussian Total Intensity Profile with Width, w Constant Degree of Polarization, p Measurement noise, n

17

18 PSR J 1.1

19 PSR J 1.0

20 PSR B 1.4

21 PSR J 1.6

22

23 PSR J

24 PSR J

25 PSR B

26 PSR J

27 Results Pulsar Benefit Systematic J0437-4715 1.11(1) 300 ns 1713+0747
0.99(6) 35 ns B 1.4(3) 30 ns 1.56(8) 400 ns

28 Conclusion Effectiveness varies by pulsar To do:
Full Polarization TOA holds promise Effectiveness varies by pulsar To do: Produce/acquire well-calibrated, high S/N polarimetric pulse profile (standards) Run simulations Improve arrival time estimates

Download ppt "Improving Pulsar Timing"

Similar presentations

The Parkes Pulsar Timing Array R. N. Manchester CSIRO Astronomy and Space Science Sydney Australia Summary Short introduction to pulsar timing basics Pulsar.

The Parkes Pulsar Timing Array R. N. Manchester CSIRO Astronomy and Space Science Sydney Australia Summary Short introduction to pulsar timing basics Pulsar.
LIGO-G080190-00-Z Beating the spin-down limit on gravitational wave emission from the Crab pulsar Michael Landry LIGO Hanford Observatory for the LIGO.

LIGO-G Z Beating the spin-down limit on gravitational wave emission from the Crab pulsar Michael Landry LIGO Hanford Observatory for the LIGO.
Update of the European Pulsar Timing Array An array of 100-m class telescopes to form a pulsar timing array and ultimately forming the Large European Array.

Update of the European Pulsar Timing Array An array of 100-m class telescopes to form a pulsar timing array and ultimately forming the Large European Array.
The Extreme Dimension: Time-Variability and The Smallest ISM Scales Dan Stinebring Oberlin College.

The Extreme Dimension: Time-Variability and The Smallest ISM Scales Dan Stinebring Oberlin College.
Using Tempo to calculate solar barycentric time Dejan Paradiž University of Ljubljana.

Using Tempo to calculate solar barycentric time Dejan Paradiž University of Ljubljana.
RFI Subtraction with a reference horn… F. Briggs & M. Kesteven illustrations from Parkes Telescope… (Jon Bell et al.) origins in Int-Mit group at CSIRO.

RFI Subtraction with a reference horn… F. Briggs & M. Kesteven illustrations from Parkes Telescope… (Jon Bell et al.) origins in Int-Mit group at CSIRO.
Gravitational Wave Detection Using Pulsar Timing Current Status and Future Progress Fredrick A. Jenet Center for Gravitational Wave Astronomy University.

Gravitational Wave Detection Using Pulsar Timing Current Status and Future Progress Fredrick A. Jenet Center for Gravitational Wave Astronomy University.
Pulsar timing with tempo2 George Hobbs Australia Telescope National Facility

Pulsar timing with tempo2 George Hobbs Australia Telescope National Facility
The Transient Universe: AY 250 Spring 2007 Existing Transient Surveys: Radio I: Pulsars Geoff Bower.

The Transient Universe: AY 250 Spring 2007 Existing Transient Surveys: Radio I: Pulsars Geoff Bower.
Detection of Gravitational Waves with Pulsar Timing R. N. Manchester Australia Telescope National Facility, CSIRO Sydney Australia Summary Brief review.

Detection of Gravitational Waves with Pulsar Timing R. N. Manchester Australia Telescope National Facility, CSIRO Sydney Australia Summary Brief review.
Navigation using pulsars ASTRONOMY AND SPACE SCIENCE George Hobbs Nov 2014.

Navigation using pulsars ASTRONOMY AND SPACE SCIENCE George Hobbs Nov 2014.
Search for the Gravitational Wave Memory effect with the Parkes Pulsar Timing Array Jingbo Wang 1,2,3, Hobbs George 3, Dick Manchester 3, Na Wang 1,4 1.

Search for the Gravitational Wave Memory effect with the Parkes Pulsar Timing Array Jingbo Wang 1,2,3, Hobbs George 3, Dick Manchester 3, Na Wang 1,4 1.
The Search for Gravitational Waves using Pulsar Timing R. N. Manchester CSIRO Astronomy and Space Science Sydney Australia Summary Brief introduction to.

The Search for Gravitational Waves using Pulsar Timing R. N. Manchester CSIRO Astronomy and Space Science Sydney Australia Summary Brief introduction to.
Current Results and Future Capabilities of Pulsar Timing Andrea N. Lommen International Liaison for NANOGrav Associate Professor of Physics and Astronomy.

Current Results and Future Capabilities of Pulsar Timing Andrea N. Lommen International Liaison for NANOGrav Associate Professor of Physics and Astronomy.
The Effect of Solar Wind on Pulsar Observations Xiaopeng YOU Southwest University, Chongqing, China.

The Effect of Solar Wind on Pulsar Observations Xiaopeng YOU Southwest University, Chongqing, China.
Neutron Star (Mostly Pulsar) Masses Ingrid Stairs UBC Vancouver CAWONAPS TRIUMF Dec. 9, 2010.

Neutron Star (Mostly Pulsar) Masses Ingrid Stairs UBC Vancouver CAWONAPS TRIUMF Dec. 9, 2010.
Scuola nazionale de Astrofisica Radio Pulsars 4: Precision Timing and GR Outline The double pulsar PSR J0737-3039A/B Strong-field tests of GR Pulsar Timing.

Scuola nazionale de Astrofisica Radio Pulsars 4: Precision Timing and GR Outline The double pulsar PSR J A/B Strong-field tests of GR Pulsar Timing.
Qiao,G.J. Dept. of Astronomy, Peking Univ. Collaborators: Zhang, B.( University of Nevada ), Xu, R.X.(PKU), Han,J.L.(NAOC), Lin,W.P.(SHO),Lee,K.J.(PKU)

Qiao,G.J. Dept. of Astronomy, Peking Univ. Collaborators: Zhang, B.( University of Nevada ), Xu, R.X.(PKU), Han,J.L.(NAOC), Lin,W.P.(SHO),Lee,K.J.(PKU)
Gravitational wave detection using radio pulsar timing Fredrick A Jenet CGWA/UTB.

Gravitational wave detection using radio pulsar timing Fredrick A Jenet CGWA/UTB.
Pulsar Timing Phenomenology … an overview…. George Hobbs Australia Telescope National Facility.

Pulsar Timing Phenomenology … an overview…. George Hobbs Australia Telescope National Facility.

Similar presentations

Ads by Google