The EPIC-pn spectral response Frank Haberl EPIC Cal meeting, Tübingen, 3.-4. February 2003 Status of the pn spectral response in SAS5.4.1 Latest developments.

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Presentation transcript:

The EPIC-pn spectral response Frank Haberl EPIC Cal meeting, Tübingen, February 2003 Status of the pn spectral response in SAS5.4.1 Latest developments in the pn spectral response

Status of the pn spectral response in SAS5.4.1 Last meeting (Vilspa July 2002) The Oxygen edge: Fudge to reduce the depth RX J : Redistribution at low energies (PEM) Now implemented (SAS5.4.1) New Quantum Efficiency curve RX J : Redistribution re-adjustment SW mode CTI correction: reduce over-correction

pn Quantum Efficiency (QE)

RX J (PEM)

PKS 2155 SW/TI medium EPIC-pn response 6.2  2 = / 2012 dof

PKS 2155 SW medium EPIC-pn response 6.2+QE around O-edge

PKS 2155 SW medium EPIC-pn response 6.3

Latest developments in the pn spectral response The energy scale Au-edge, O-edge (BL Lacs) Emission lines (N132D and 1E0102) Vela SNR Long-term stability Internal cal source Isolated neutron stars

Energy shift at Au- and O-edge

Au-edge (SW mode) Average

O-edge (SW mode)

SNRs N132D and 1E0102

Spectrum

O VII / VIII line energies Average

PEM Energy to channel conversion

Vela SNR 0.2 – 1.2 keVRev

Vela SNR spectra Near CAMEXAway CAMEX

O VII line energies in Vela

Long term trends (internal cal source)

Long term trends (soft response)

RXJ pn summary Revolution Readout mode FF FF FF FF Filter thin medium thin thin Event pattern singles singles singles singles Ext. rad. (´´) % PSF Flux ( erg s -1 ) keV Flux relative Flux ( erg s -1 ) PSF corrected PSPC: 11.5 LETG: 9.9 Ext. rad. (´´) NH (10 20 ) typical error 0.2 LETG: 1.59 Bbody kT (eV) typical error 1.1 LETG: 81.6

Current status of EPIC-pn response PN 6.4 CTI under correction at 600 eV in FF mode (Vela) change will influence all modes (increases energies which are already too high) needs ´gain´ reduction at low energies can be done in energy-channel conversion in PEM CTE degradation seems to slow down some further monitoring before action

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