Документ взят из кэша поисковой машины. Адрес оригинального документа : http://xmm.vilspa.esa.es/calibration/documentation/epic_cal_meetings/200610/MartinA.pdf
Дата изменения: Wed May 14 13:06:20 2014
Дата индексирования: Wed Apr 13 13:16:21 2016
Кодировка:
Поисковые слова: large magellanic cloud

Relative timing of XMM-Newton
A. Martin-Carrillo1,3, M.G.F. Kirsch1, E. Kendziorra2
2

ESA XMM-SOC, ESAC Spain IAAT, University of Tuebingen, Germany 3 University Complutense Madrid, Spain
1

Antonio Martin-Carrillo
XMM-Newton EPIC Page 1

menu

· relative timing accuracy
brief introduction to relative timing brief introduction to all pulsars analyzed crab monitoring other pulsars (i.e. NRCO 58) error approximation

Antonio Martin-Carrillo
XMM-Newton EPIC Page 2

EPIC-pn relative timing accuracy

· relative timing is checked for EPIC-pn fast modes mainly · 2 Crab observations per year · various other pulsars (i.e. NRCO 58)

relative error

X-Ray Period = P X Radio Period = P R

Antonio Martin-Carrillo
XMM-Newton EPIC Page 3

Crab pulsar
· distance: ~2.2 kPc · period: ~33ms
Rev ID 0056 0122330701 0056 0122330801 0234 0135730701 0411 0153750201 0411 0153750301 0411 0153750401 0411 0153750501 0698 0160960201 0700 0160960301 0874 0160960401 0874 0160960501 0874 0160960601 0955 0160960701 0955 0160960801 0955 0160960901 1048 0160961001 1049 0160961101 1049 0160961201 1138 0312790101 1138 0312790201 1138 0312790401 1140 0160961301 1140 0160961401 1140 0160961501 Obs. Time (s) 7003 small 22577 9999 4634 8999 8996 8999 28264 10172 14718 4993 small 3983 8202 5000 8202 4991 5001 4993 42497 5026 7801 5000 4992 6703

window

window

Antonio Martin-Carrillo
XMM-Newton EPIC Page 4

· PSRB 0540-69

other pulsars (I) · PSRB 1509-58

Rev 0085

ID Obs.Time (s) 0125120201 17000

· pulsar in the Large Magellanic · pulsar in the SNR MSH 15-2 Cloud · distance: ~6kPc · distance: ~50kPc · period: ~150ms · period: ~50ms three new observations for PSRB 0540-69 and one for PSRB 1509-59 (NRCO 58) simultaneously with Parkes and RXTE
Antonio Martin-Carrillo
XMM-Newton EPIC Page 5

Rev ID 0137 0128120401 1136 0312590101

Obs.Time (s) 10000 32000

other pulsars (II) · PSRB 1055-52 · Vela

Rev 0187

ID Obs.Time (s) 0113050201 30000

· one of the `three musketeers' (PSR B1055, B0656,Geminga) · distance: 0.5 1.5 kPc · period: 197ms

Rev 0180 0180 0180 0180

ID Obs.Time (s) 0111080101 37900 0111080201 58600 small 0111080301 1835 0153951401 121000

window

· ·

distance: 0.29 kPc period: 89 ms

Antonio Martin-Carrillo
XMM-Newton EPIC Page 6

other pulsars (III) · PSRJ 0537-69
Rev 0357 ID Obs.Time (s) 0113020201 36000

· pulsar in the Large Magellanic Cloud · distance: ~50kPc · period: ~16ms

Antonio Martin-Carrillo
XMM-Newton EPIC Page 7

folded light curves

Antonio Martin-Carrillo
XMM-Newton EPIC Page 8

radio periods
Radio Period

Linear Interpolation

Radio Period

Extrapolation

Epoch (MJD)

Epoch (MJD)

Crab

B0540, B1509, B1055, Vela, J0537

· Parkes Observatory
· The ATNF Pulsar database · European Pulsar Network · RXTE telescope · astro-ph
Antonio Martin-Carrillo
XMM-Newton EPIC Page 9

Automatic tool for Crab!

X-ray periods
Fold the data over a range of test periods Pi:
P
Intensity

3

First trial: radio period

P P
1

2

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

low 2
Antonio Martin-Carrillo
XMM-Newton EPIC Page 10

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

Antonio Martin-Carrillo
XMM-Newton EPIC Page 11

relative timing accuracy for the Crab

small window

P/P3.7x10-8 P/P4.7x10-8

(timing and burst) (small window)
Antonio Martin-Carrillo
XMM-Newton EPIC Page 12

relative timing accuracy for all pulsars

· observations inside black circles have less reliable radio ephemeris. · observation inside red circle has a very low exposure (2 ks)

P/P=(4.5±9.9)x10-8

Antonio Martin-Carrillo
XMM-Newton EPIC Page 13

approximated P/P
· P=PR-P
X

error of our observation

· consider that the radio period has no error · the P comes from the error of the X-ray period · 2 distribution can be approximated by a triangle

P

1

P

0

P

2

· approximation: · compare the real and approximated errors of the periods

Antonio Martin-Carrillo
XMM-Newton EPIC Page 14

approximated P/P

Antonio Martin-Carrillo
XMM-Newton EPIC Page 15

Monte Carlo simulations

simulated: errPX=errP'

X R

observational: errPX= P=PX-P

approximated: errPX=FWHM/DOF

for the Crab: DOF=100
Antonio Martin-Carrillo
XMM-Newton EPIC Page 16

conclusions
· Relative timing accuracy of XMM-Newton:

P/P3.7x10-8 P/P4.7x10-8

(timing and burst) (small window) (all pulsars)

P/P=(4.5±9.9)x10-8
· errors calculation:

err(P/P)2x10-8 (simulated) err(P/P)6x10-9 (observational) err(P/P)2x10-8 (approximated)
Antonio Martin-Carrillo
XMM-Newton EPIC Page 17

things to do now...
· analysis of NRCO 58 (second part) observation of PSRB0540 · further analysis of other pulsars. · Monte Carlo simulations for the other pulsars. · Monte Carlo simulations of the light curves.

Antonio Martin-Carrillo
XMM-Newton EPIC Page 18