XMM-Newton EPIC relative timing analysis

Isabel Caballero, Anne WellbrockIsabel Caballero, Anne Wellbrock

XMM-NewtonXMM-Newton

ESACESAC

XMM-Newton EPIC relative XMM-Newton EPIC relative timing analysistiming analysis

Isabel CaballeroIsabel Caballero

Anne WellbrockAnne Wellbrock

M.G.F. KirschM.G.F. Kirsch



ESACESACOutlineOutline

1.1. Relative timing accuracyRelative timing accuracy2.2. Targets Targets 3.3. Processing of dataProcessing of data4.4. Radio period of the pulsarsRadio period of the pulsars5.5. X-Ray period of the pulsarsX-Ray period of the pulsars6.6. Final resultsFinal results



ESACESACEPIC-pnEPIC-pn Relative timing accuracyRelative timing accuracy

Fastest instrument on XMM-Newton

Highest time resolution reached in timing and burst modes

Pulsars used in analysis observed in these modes

PR-PX

PR PR

P

Relative Error

X-Ray Period = PX

Radio Period = PR



ESACESACCrab pulsar

Distance: ~2.2kPc Period: ~33ms

Rev ID Rev ID Obs. Time (ks)Obs. Time (ks)0056 01223308010056 0122330801 22577225770234 01357307010234 0135730701 9999 99990411 01537502010411 0153750201 4634 46340411 01537503010411 0153750301 8999 89990411 01537504010411 0153750401 8996 89960411 01537505010411 0153750501 8999 89990698 01609602010698 0160960201 28264282640700 01609603010700 0160960301 10172101720874 01609604010874 0160960401 14718147180874 01609606010874 0160960601 3983 39830955 01609607010955 0160960701 8202 82020955 01609608010955 0160960801 5000 50000955 01609609010955 0160960901 8202 8202

XMM-Newton performs two observations a year of the Crab



ESACESACPSR 0540PSR 0540

Rev ID Rev ID Obs.Time (ks)Obs.Time (ks)0085 01251202010085 0125120201 17 17

• Pulsar in the Large Magellanic Cloud

• Distance: ~50kPc

• Period: ~50ms

Chandra, X-ray band, NASA



ESACESACPSR 1509-58

• Pulsar in the SNR MSH 15-2

• Distance: ~6kPc

• Period: ~150ms

Chandra, X-ray band, NASA




ESACESACPSR B1055-52

One of the ‘three musketeers’ (PSR B1055, B0656,Geminga) Distance: 0.5 – 1.5 kPc Period: 197ms

BeppoSax, 1-10keV, NASA




ESACESACdata processing

ODF

Event File

epproc

Event File Barycentric Corrected

Source Region

barycen

evselect

AIO (XMM-Science Archive)



ESACESACRadio periods of the pulsars

Epoch (MJD)

Linear Interpolation

Radio Period

Epoch (MJD)

Radio Period

Extrapolation

Crab B0540, B1509, B1055

Automatic tool for

Crab!



ESACESAC

P1

P3

P2

efsearchefsearch

Fold the data over a range of test periods Pi:

X-ray period of the pulsars

First trial: radio period

Inte

nsi

ty

Time

Good period High High 22Small Small 22Bad period

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



ESACESAC2 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



ESACESACFolded light curves



ESACESACRelative timing accuracy for the CrabRelative timing accuracy for the Crab

P/P<3.10-8

epoch (MJD) time base (log(sec))

P/P

P/P



ESACESACRelative timing accuracy for all pulsarsRelative timing accuracy for all pulsars

P/P

Period (ms)P

/PRevolution



ESACESACThings to do now…Things to do now…

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

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

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

XMM-Newton EPIC relative timing analysis

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