1. 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 in the pn spectral response

2. Status of the pn spectral response in SAS5.4.1 Last meeting (Vilspa July 2002) The Oxygen edge: Fudge to reduce the depth RX J1856.5-3754: Redistribution at low energies (PEM) Now implemented (SAS5.4.1) New Quantum Efficiency curve RX J1856.5-3754: Redistribution re-adjustment SW mode CTI correction: reduce over-correction

3. pn Quantum Efficiency (QE)

4. RX J1856.5-3754 (PEM)

5. PKS 2155 SW/TI medium EPIC-pn response 6.2  2 = 10700 / 2012 dof

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

7. PKS 2155 SW medium EPIC-pn response 6.3

8. 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

9. Energy shift at Au- and O-edge

10. Au-edge (SW mode) Average 0.995 +- 0.001

11. O-edge (SW mode)

12. SNRs N132D and 1E0102

13. Spectrum

14. O VII / VIII line energies Average 1.004 +- 0.001

15. PEM Energy to channel conversion

16. Vela SNR 0.2 – 1.2 keVRev 533+534

17. Vela SNR spectra Near CAMEXAway CAMEX

18. O VII line energies in Vela

22. Long term trends (internal cal source)

24. Long term trends (soft response)

26. RXJ0720.4-3125 pn summary Revolution 0078 0175 0533 0534 Readout mode FF FF FF FF Filter thin medium thin thin Event pattern singles singles singles singles Ext. rad. (´´) 40 40 40 40 87% PSF Flux (10 -12 erg s -1 ) 9.78 9.92 9.74 9.78 0.1-2.4 keV Flux relative 1.000 1.015 0.995 1.002 Flux (10 -12 erg s -1 ) 11.24 11.40 11.20 11.24 PSF corrected PSPC: 11.5 LETG: 9.9 Ext. rad. (´´) 20-40 15-40 20-40 20-40 NH (10 20 ) 1.55 1.69 1.68 1.39 typical error 0.2 LETG: 1.59 Bbody kT (eV) 82.8 82.5 86.2 86.9 typical error 1.1 LETG: 81.6

27. 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