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XMM-Newton EPIC relative timing analysis. Isabel Caballero Anne Wellbrock M.G.F. Kirsch. Outline. Relative timing accuracy Targets Processing of data Radio period of the pulsars X-Ray period of the pulsars Final results. Fastest instrument on XMM-Newton

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Xmm newton epic relative timing analysis
XMM-Newton EPIC relative timing analysis

Isabel CaballeroAnne WellbrockM.G.F. Kirsch


Outline
Outline

  • Relative timing accuracy

  • Targets

  • Processing of data

  • Radio period of the pulsars

  • X-Ray period of the pulsars

  • Final results


Epic pn relative timing accuracy

Fastest instrument on XMM-Newton

Highest time resolution reached in timing and burst modes

Pulsars used in analysis observed in these modes

EPIC-pnRelative timing accuracy

X-Ray Period = PXRadio Period = PR

PR-PX

P

Relative Error

PR

PR


Crab pulsar
Crab pulsar

XMM-Newton performs two observations a year ofthe Crab

  • Distance: ~2.2kPc

  • Period: ~33ms

Rev ID Obs. Time (ks)

0056 0122330801 22577

0234 0135730701 9999

0411 0153750201 4634

0411 0153750301 8999

0411 0153750401 8996

0411 0153750501 8999

0698 0160960201 28264

0700 0160960301 10172

0874 0160960401 14718

0874 0160960601 3983

0955 0160960701 8202

0955 0160960801 5000

0955 0160960901 8202


Psr 0540
PSR 0540

  • Pulsar in the Large Magellanic Cloud

  • Distance: ~50kPc

  • Period: ~50ms

Rev ID Obs.Time (ks)

0085 0125120201 17

Chandra, X-ray band, NASA


Psr 1509 58
PSR 1509-58

  • Pulsar in the SNR MSH 15-2

  • Distance: ~6kPc

  • Period: ~150ms

Rev ID Obs.Time (ks)

0137 0128120401 10

Chandra, X-ray band, NASA


Psr b1055 52
PSR B1055-52

  • One of the ‘three musketeers’ (PSR B1055, B0656,Geminga)

  • Distance: 0.5 – 1.5 kPc

  • Period: 197ms

Rev ID Obs.Time (ks)

0187 0113050201 30

BeppoSax, 1-10keV, NASA



Xmm newton epic relative timing analysis

Radio periods of the pulsars

B0540, B1509, B1055

Crab

Automatic tool for Crab!


Xmm newton epic relative timing analysis

X-ray period of the pulsars

Fold the data over a range of test periods Pi:

P3

First trial: radio period

P2

Intensity

P1

efsearch

Time

For each test period determine 2 of the fit of the folded light curve vs. a uniform distribution:

Good period

High 2

Bad period

Small 2


2 distribution
2 distribution

The weighted mean of the periods with 2 gives the best X-ray period

FWHM  P2/T

Reduced chi2 vs period for all pulsars



Relative timing accuracy for the crab
Relative timing accuracy for the Crab

P/P

P/P

epoch (MJD)

time base (log(sec))

P/P<3.10-8


Relative timing accuracy for all pulsars
Relative timing accuracy for all pulsars

P/P

P/P

Period (ms)

Revolution


Things to do now

Automatic tool available to check the relative timing accuracy for future Crab observations

Future XMM-Newton observation of pulsars B0540 and B1509 in order to verify relative timing??

Absolute timing analysis: create a tool to check the absolute timing accuracy  geo-centre XMM data or barycentre radio data

Things to do now…