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EPIC Calibration Meeting, MallorcaEPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNRLow energy calibration with the Vela SNR K. Dennerl, 2009 March K. Dennerl, 2009 March 3131
Low energy calibration with the Vela SNRLow energy calibration with the Vela SNR
Mallorca, Spain, 2009 March 31 – April 1Mallorca, Spain, 2009 March 31 – April 1
EPIC Calibration & Operations Meeting
EPIC Calibration Meeting, MallorcaEPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNRLow energy calibration with the Vela SNR K. Dennerl, 2009 March K. Dennerl, 2009 March 3131
2001- 2007: 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
EPIC Calibration Meeting, MallorcaEPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNRLow energy calibration with the Vela SNR K. Dennerl, 2009 March K. Dennerl, 2009 March 3131
Monitoring the absolute energy scale @ 0.57 keV with the Vela SNR:
EPIC Calibration Meeting, MallorcaEPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNRLow energy calibration with the Vela SNR K. Dennerl, 2009 March K. Dennerl, 2009 March 3131
Monitoring the absolute energy scale @ 1.49 keV with the internal calibration source:
EPIC Calibration Meeting, MallorcaEPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNRLow energy calibration with the Vela SNR K. Dennerl, 2009 March K. Dennerl, 2009 March 3131
Vela SNR
internal calibration source
Comparison: trends at 0.57 keV and 1.49 keV
0.57 keV
1.49 keV
EPIC Calibration Meeting, MallorcaEPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNRLow energy calibration with the Vela SNR K. Dennerl, 2009 March K. Dennerl, 2009 March 3131
0.574 keV (Vela SNR)
1.486 keV (Al-K, scaled)
Comparison: trends at 0.57 keV and 1.49 keV
EPIC Calibration Meeting, MallorcaEPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNRLow energy calibration with the Vela SNR K. Dennerl, 2009 March K. Dennerl, 2009 March 3131
Internal calibration source onboard XMM-Newton / EPIC-pn
Al-K Mn-K
inhomogeneous irradiation at Mn-K, illumination of quadrant 3 very poor
EPIC Calibration Meeting, MallorcaEPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNRLow energy calibration with the Vela SNR K. Dennerl, 2009 March K. Dennerl, 2009 March 3131
0.40 – 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
EPIC Calibration Meeting, MallorcaEPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNRLow energy calibration with the Vela SNR K. Dennerl, 2009 March K. Dennerl, 2009 March 3131
0.40 – 0.74 keV
photon map
(singles)
adaptive binning into subareas of similar signal
Spatial properties of the absolute energy scale
EPIC Calibration Meeting, MallorcaEPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNRLow energy calibration with the Vela SNR K. Dennerl, 2009 March K. Dennerl, 2009 March 3131
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
EPIC Calibration Meeting, MallorcaEPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNRLow energy calibration with the Vela SNR K. Dennerl, 2009 March K. Dennerl, 2009 March 3131
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
EPIC Calibration Meeting, MallorcaEPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNRLow energy calibration with the Vela SNR K. Dennerl, 2009 March K. Dennerl, 2009 March 3131
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
EPIC Calibration Meeting, MallorcaEPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNRLow energy calibration with the Vela SNR K. Dennerl, 2009 March K. Dennerl, 2009 March 3131
Spectral model used ( E = 0.43 – 0.74 keV )
EPIC Calibration Meeting, MallorcaEPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNRLow energy calibration with the Vela SNR K. Dennerl, 2009 March K. Dennerl, 2009 March 3131
EPIC Calibration Meeting, MallorcaEPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNRLow energy calibration with the Vela SNR K. Dennerl, 2009 March K. Dennerl, 2009 March 3131
result:result:
energy scale spatially homogeneous within ±10 eV
however, also evidence for systematic shifts in a ring-like pattern
EPIC Calibration Meeting, MallorcaEPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNRLow energy calibration with the Vela SNR K. Dennerl, 2009 March K. Dennerl, 2009 March 3131
EPIC Calibration Meeting, MallorcaEPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNRLow energy calibration with the Vela SNR K. Dennerl, 2009 March K. Dennerl, 2009 March 3131
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
EPIC Calibration Meeting, MallorcaEPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNRLow energy calibration with the Vela SNR K. Dennerl, 2009 March K. Dennerl, 2009 March 3131
EPIC Calibration Meeting, MallorcaEPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNRLow energy calibration with the Vela SNR K. Dennerl, 2009 March K. Dennerl, 2009 March 3131
EPIC Calibration Meeting, MallorcaEPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNRLow energy calibration with the Vela SNR K. Dennerl, 2009 March K. Dennerl, 2009 March 3131
EPIC Calibration Meeting, MallorcaEPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNRLow energy calibration with the Vela SNR K. Dennerl, 2009 March K. Dennerl, 2009 March 3131
EPIC Calibration Meeting, MallorcaEPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNRLow energy calibration with the Vela SNR K. Dennerl, 2009 March K. Dennerl, 2009 March 3131
EPIC-Cal Meeting, Tübingen, Germany, 2003 Feb 3-5
9.874 keV (Ge-K)
1.186 keV (Ge-L)
EPIC Calibration Meeting, MallorcaEPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNRLow energy calibration with the Vela SNR K. Dennerl, 2009 March K. Dennerl, 2009 March 3131
EPIC-Cal Meeting, Tübingen, Germany, 2003 Feb 3-5
9.874 keV (Ge-K)
1.186 keV (Ge-L)
EPIC Calibration Meeting, MallorcaEPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNRLow energy calibration with the Vela SNR K. Dennerl, 2009 March K. Dennerl, 2009 March 3131
Printed Circuit Board
EPIC Calibration Meeting, MallorcaEPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNRLow energy calibration with the Vela SNR K. Dennerl, 2009 March K. Dennerl, 2009 March 3131
EPIC-Cal Meeting, Tübingen, Germany, 2003 Feb 3-5
9.874 keV (Ge-K)
1.186 keV (Ge-L)
EPIC Calibration Meeting, MallorcaEPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNRLow energy calibration with the Vela SNR K. Dennerl, 2009 March K. Dennerl, 2009 March 3131
EPIC-Cal Meeting, Tübingen, Germany, 2003 Feb 3-5
EPIC Calibration Meeting, MallorcaEPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNRLow energy calibration with the Vela SNR K. Dennerl, 2009 March K. Dennerl, 2009 March 3131
EPIC-Cal Meeting, VILSPA, Spain, 2004 Mar 23-24
EPIC Calibration Meeting, MallorcaEPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNRLow energy calibration with the Vela SNR K. Dennerl, 2009 March K. Dennerl, 2009 March 3131
EPIC-Cal Meeting, Mallorca, Spain, 2009 March 31 – April 1
EPIC Calibration Meeting, MallorcaEPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNRLow energy calibration with the Vela SNR K. Dennerl, 2009 March K. Dennerl, 2009 March 3131
Comparison with Mn-K
EPIC Calibration Meeting, MallorcaEPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNRLow energy calibration with the Vela SNR K. Dennerl, 2009 March K. Dennerl, 2009 March 3131
Comparison with Mn-K
EPIC Calibration Meeting, MallorcaEPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNRLow energy calibration with the Vela SNR K. Dennerl, 2009 March K. Dennerl, 2009 March 3131
Mn-K
EPIC Calibration Meeting, MallorcaEPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNRLow energy calibration with the Vela SNR K. Dennerl, 2009 March K. Dennerl, 2009 March 3131
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
EPIC Calibration Meeting, MallorcaEPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNRLow energy calibration with the Vela SNR K. Dennerl, 2009 March K. Dennerl, 2009 March 3131
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
EPIC Calibration Meeting, MallorcaEPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNRLow energy calibration with the Vela SNR K. Dennerl, 2009 March K. Dennerl, 2009 March 3131
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
EPIC Calibration Meeting, MallorcaEPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNRLow energy calibration with the Vela SNR K. Dennerl, 2009 March K. Dennerl, 2009 March 3131
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
EPIC Calibration Meeting, MallorcaEPIC Calibration Meeting, Mallorca Low energy calibration with the Vela SNRLow energy calibration with the Vela SNR K. Dennerl, 2009 March K. Dennerl, 2009 March 3131
Low energy calibration with the Vela SNRLow energy calibration with the Vela SNR
Mallorca, Spain, 2009 March 31 – April 1Mallorca, Spain, 2009 March 31 – April 1
EPIC Calibration & Operations Meeting
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