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XMM EPIC MOS Steve Sembay MPE 04/05/06 The Effective Area of EPIC A comparison of MOS1, MOS2 and PN derived fluxes of 17 on-axis AGN.

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Presentation on theme: "XMM EPIC MOS Steve Sembay MPE 04/05/06 The Effective Area of EPIC A comparison of MOS1, MOS2 and PN derived fluxes of 17 on-axis AGN."— Presentation transcript:

1 XMM EPIC MOS Steve Sembay (sfs5@star.le.ac.uk) MPE 04/05/06 The Effective Area of EPIC A comparison of MOS1, MOS2 and PN derived fluxes of 17 on-axis AGN observed between Revolutions 63 and 683

2 XMM EPIC MOS Steve Sembay (sfs5@star.le.ac.uk) MPE 04/05/06 OrbitSourceMOS FilterPN FilterInnerMos OuterPN Outer 63MS0737.9+7441Thin 0800550 75Mkn 205Medium 0800 82MS1229.2+6430Thin 0800 943C 273Medium 150800 953C 273Medium 150800 953C 273Medium 150800 963C 273Medium 150800 107Mkn 359Medium 0800 161Mkn 509Thin 0800 192Mkn 335Medium 200800 2773C 273Medium 150800 301MCG-6-30-15Medium 0800 451H1419+480Thin 0800 621MS1229.2+6430Thin 0800 6553C 273Thin 150800 679Ark 120Thin 150700 683H0414+009Thin 0800 The sample: Mixture of BL Lacs and “ Soft Excess ” AGN

3 XMM EPIC MOS Steve Sembay (sfs5@star.le.ac.uk) MPE 04/05/06 The Effective Area of EPIC Fluxes are derived in 4 energy bands 0.54-0.85 keV, 0.85-1.5 keV, 1.5-4.0 keV, 4.0-10 keV Methodology: Fit tbabs*po model (nH fixed at global value) in each band to each camera separately and derive absorbed flux. Pattern 0-12 (MOS) and Pattern 0-4 (PN) SAS 6.5.0 with current public CCFs

4 XMM EPIC MOS Steve Sembay (sfs5@star.le.ac.uk) MPE 04/05/06 Example (3C 273) fits to PN, Model folded though MOS

5 XMM EPIC MOS Steve Sembay (sfs5@star.le.ac.uk) MPE 04/05/06 0-405-40 Checking for pile-up in 3C 273

6 XMM EPIC MOS Steve Sembay (sfs5@star.le.ac.uk) MPE 04/05/06 7.5-4010-40 Checking for pile-up in 3C 273

7 XMM EPIC MOS Steve Sembay (sfs5@star.le.ac.uk) MPE 04/05/06 100*(MOS1-PN)/PN

8 XMM EPIC MOS Steve Sembay (sfs5@star.le.ac.uk) MPE 04/05/06 100*(MOS2-PN)/PN

9 XMM EPIC MOS Steve Sembay (sfs5@star.le.ac.uk) MPE 04/05/06 Band (keV) (MOS1-PN)/PN(MOS2-PN)/PN 0.54-0.85-5.4%-1.6% 0.85-1.50+2.4%+4.1% 1.50-4.0+6.8%+7.3% 4.0-10.0+11.4%+7.4%

10 XMM EPIC MOS Steve Sembay (sfs5@star.le.ac.uk) MPE 04/05/06 (MOS1-PN)/PN (MOS2-PN)/PN Thin Medium

11 XMM EPIC MOS Steve Sembay (sfs5@star.le.ac.uk) MPE 04/05/06 pn MOS1 MOS2 3c 273: Flux Comparison, 7.5 ” -40 ” v 15 ” -40 ” extraction radii Problem with the psf? – See talk by Andy later

12 XMM EPIC MOS Steve Sembay (sfs5@star.le.ac.uk) MPE 04/05/06 pn MOS1 MOS2 MCG-6-30-15: 0 ”, 7.5 ”, 11.25 ”, 15 ” inner extraction radii, 40 ” outer Problem with the psf? – See talk by Andy later

13 XMM EPIC MOS Steve Sembay (sfs5@star.le.ac.uk) MPE 04/05/06 Band (keV) (MOS1-PN)/PN(MOS2-PN)/PN 0.54-0.85-5.4%-1.6% 0.85-1.50+2.4%+4.1% 1.50-4.0+6.8%+7.3% 4.0-10.0+11.4%+7.4%

14 XMM EPIC MOS Steve Sembay (sfs5@star.le.ac.uk) MPE 04/05/06 Quantum Efficiency measurements from Orsay MOS1 – Central CCD

15 XMM EPIC MOS Steve Sembay (sfs5@star.le.ac.uk) MPE 04/05/06 Quantum Efficiency measurements from Orsay MOS2 – Central CCD

16 XMM EPIC MOS Steve Sembay (sfs5@star.le.ac.uk) MPE 04/05/06 Surface Pixel Geometry in Monte Carlo model

17 XMM EPIC MOS Steve Sembay (sfs5@star.le.ac.uk) MPE 04/05/06 SEM Pictures Side View Top View

18 XMM EPIC MOS Steve Sembay (sfs5@star.le.ac.uk) MPE 04/05/06 (MOS1-PN)/PN +12% +2%

19 XMM EPIC MOS Steve Sembay (sfs5@star.le.ac.uk) MPE 04/05/06 (MOS2-PN)/PN +12% +2%

20 XMM EPIC MOS Steve Sembay (sfs5@star.le.ac.uk) MPE 04/05/06 H 2 O = 0.08 μm

21 XMM EPIC MOS Steve Sembay (sfs5@star.le.ac.uk) MPE 04/05/06 H 2 O = 0.08 μm SiO 2 = 0.05 μm

22 XMM EPIC MOS Steve Sembay (sfs5@star.le.ac.uk) MPE 04/05/06

23 XMM EPIC MOS Steve Sembay (sfs5@star.le.ac.uk) MPE 04/05/06 Summary: Shape of the MOS/PN discrepancy suggests problem lies with the quantum efficiency Adjustment of the MOS QE would be consistent with Orsay measurements and probable uncertainties in model Adjusting the QE would leave a residual normalisation offset of about 5-7% between MOS and PN Would need to increase MOS global effective area or decrease PN global effective area to achieve absolute consistency MOS low energy rmf would need re-calibration for consistency with any change in the QE

24 XMM EPIC MOS Steve Sembay (sfs5@star.le.ac.uk) MPE 04/05/06 Rate down 8% Flux down 5% Eff. Area down 3% Count Rate/Effective Area normalised to Rev 156 DatumComparison of high energy portion of the spectra from 795 and 903

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