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EPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNR K. Dennerl, 2009 March 31 Low energy calibration with the Vela SNR Mallorca,

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Presentation on theme: "EPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNR K. Dennerl, 2009 March 31 Low energy calibration with the Vela SNR Mallorca,"— Presentation transcript:

1 EPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNR K. Dennerl, 2009 March 31 Low energy calibration with the Vela SNR Mallorca, Spain, 2009 March 31 – April 1 EPIC Calibration & Operations Meeting

2 EPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNR K. Dennerl, 2009 March : 12 long FF observations, several with different pointing coordinates and roll angles  fairly homogeneous illumination of the detector Vela SNR: extended source with bright OVII emission  excellent calibration source

3 EPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNR K. Dennerl, 2009 March 31 Monitoring the absolute energy 0.57 keV with the Vela SNR:

4 EPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNR K. Dennerl, 2009 March 31 Monitoring the absolute energy 1.49 keV with the internal calibration source:

5 EPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNR K. Dennerl, 2009 March 31 Vela SNR internal calibration source Comparison: trends at 0.57 keV and 1.49 keV 0.57 keV 1.49 keV

6 EPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNR K. Dennerl, 2009 March keV (Vela SNR) keV (Al-K, scaled) Comparison: trends at 0.57 keV and 1.49 keV

7 EPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNR K. Dennerl, 2009 March 31 Internal calibration source onboard XMM-Newton / EPIC-pn Al-K Mn-K inhomogeneous irradiation at Mn-K, illumination of quadrant 3 very poor

8 EPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNR K. Dennerl, 2009 March – 0.74 keV total exposure (after removing times of background flares): ~300 ks photon map (singles) exposure corrected map Superposition of all Vela SNR observations in FF mode exposure map maximum: 172 singles/pixel

9 EPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNR K. Dennerl, 2009 March – 0.74 keV photon map (singles)  adaptive binning into subareas of similar signal Spatial properties of the absolute energy scale

10 EPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNR K. Dennerl, 2009 March 31 vertical binning according to response matrices horizontal binning adaptively, criterion: ~5000 single events within 400 – 740 eV (above background)  422 fields Spatial properties of the absolute energy scale

11 EPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNR K. Dennerl, 2009 March 31 removal of periods of enhanced background correction for local energy shifts due to errors in the offset map (epreject) correction for energy shifts between the individual observations correction for out-of-time events Preparations for a joint fit

12 EPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNR K. Dennerl, 2009 March 31 Spectral model used ( E = 0.43 – 0.74 keV ) all line energies and widths coupled to reference line (O VII r) relative line fluxes of O VII triplet fixed continuum approximated by powerlow 8 fit parameters

13 EPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNR K. Dennerl, 2009 March 31 Spectral model used ( E = 0.43 – 0.74 keV )

14 EPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNR K. Dennerl, 2009 March 31

15 EPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNR K. Dennerl, 2009 March 31 result: energy scale spatially homogeneous within ±10 eV however, also evidence for systematic shifts in a ring-like pattern

16 EPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNR K. Dennerl, 2009 March 31

17 EPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNR K. Dennerl, 2009 March 31 removal of periods of enhanced background correction for local energy shifts due to errors in the offset map (epreject) correction for energy shifts between the individual observations correction for out-of-time events different binning, different spectral models Checks for stability and reproducibility of the result

18 EPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNR K. Dennerl, 2009 March 31

19 EPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNR K. Dennerl, 2009 March 31

20 EPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNR K. Dennerl, 2009 March 31

21 EPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNR K. Dennerl, 2009 March 31

22 EPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNR K. Dennerl, 2009 March 31 EPIC-Cal Meeting, Tübingen, Germany, 2003 Feb keV (Ge-K)1.186 keV (Ge-L)

23 EPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNR K. Dennerl, 2009 March 31 EPIC-Cal Meeting, Tübingen, Germany, 2003 Feb keV (Ge-K)1.186 keV (Ge-L)

24 EPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNR K. Dennerl, 2009 March 31 Printed Circuit Board

25 EPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNR K. Dennerl, 2009 March 31 EPIC-Cal Meeting, Tübingen, Germany, 2003 Feb keV (Ge-K)1.186 keV (Ge-L)

26 EPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNR K. Dennerl, 2009 March 31 EPIC-Cal Meeting, Tübingen, Germany, 2003 Feb 3-5

27 EPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNR K. Dennerl, 2009 March 31 EPIC-Cal Meeting, VILSPA, Spain, 2004 Mar 23-24

28 EPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNR K. Dennerl, 2009 March 31 EPIC-Cal Meeting, Mallorca, Spain, 2009 March 31 – April 1

29 EPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNR K. Dennerl, 2009 March 31 Comparison with Mn-K

30 EPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNR K. Dennerl, 2009 March 31 Comparison with Mn-K

31 EPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNR K. Dennerl, 2009 March 31 Mn-K

32 EPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNR K. Dennerl, 2009 March 31 Correcting spatial inhomogeneities of the absolute energy scale 1.offsets in the energy scale due to errors in the offset map 2.column gain variations after launch 3.CTI changes due to residual light through the ventilation hole 20 adu image, rev 546 EPIC-Cal Meeting, MPE-Garching, Germany, 2006 May 4

33 EPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNR K. Dennerl, 2009 March 31 EPIC-Cal Meeting, Mallorca, Spain, 2007 Nov 6-7 Correcting spatial inhomogeneities of the absolute energy scale 1.offsets in the energy scale due to errors in the offset map 2.column gain variations after launch 3.CTI changes due to residual light through the ventilation hole

34 EPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNR K. Dennerl, 2009 March 31 EPIC-Cal Meeting, Mallorca, Spain, 2007 Nov 6-7 Correcting spatial inhomogeneities of the absolute energy scale 1.offsets in the energy scale due to errors in the offset map 2.column gain variations after launch 3.CTI changes due to residual light through the ventilation hole

35 EPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNR K. Dennerl, 2009 March 31 EPIC-Cal Meeting, Mallorca, Spain, 2009 March 31 – April 1 Correcting spatial inhomogeneities of the absolute energy scale 1.offsets in the energy scale due to errors in the offset map 2.column gain variations after launch 3.CTI changes due to residual light through the ventilation hole

36 EPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNR K. Dennerl, 2009 March 31 Low energy calibration with the Vela SNR Mallorca, Spain, 2009 March 31 – April 1 EPIC Calibration & Operations Meeting


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