1. XMM EPIC SOC Richard Saxton Background, Operations & Calibration (BOC) meeting Mallorca, 30/03/09-01/04/09 The Timing Mode PSF Richard Saxton, Maria Diaz Trigo, Matteo Guainazzi

2. XMM EPIC SOC Richard Saxton Background, Operations & Calibration (BOC) meeting Mallorca, 30/03/09-01/04/09 Columns in Timing mode

3. XMM EPIC SOC Richard Saxton Background, Operations & Calibration (BOC) meeting Mallorca, 30/03/09-01/04/09 Current SAS: Flux per column Col Constant 0 1.0 1 1.23 2 1.65 3 2.15 4 2.53 5 3.14 6 3.78 7 4.69 Fit to Vela with: Const * wabs * plaw

4. XMM EPIC SOC Richard Saxton Background, Operations & Calibration (BOC) meeting Mallorca, 30/03/09-01/04/09 SAS 8 arfgen - GX 339+4 (1000 c/s) All columns All – col 0 All – col-1 to col+1 All – col-2 to col+2 All – col-3 to col+3 All – col-4 to col+4

5. XMM EPIC SOC Richard Saxton Background, Operations & Calibration (BOC) meeting Mallorca, 30/03/09-01/04/09 SAS 8 arfgen - 1254 (600 c/s) 1254

6. XMM EPIC SOC Richard Saxton Background, Operations & Calibration (BOC) meeting Mallorca, 30/03/09-01/04/09 SAS 8: Add up annular contriutions

7. XMM EPIC SOC Richard Saxton Background, Operations & Calibration (BOC) meeting Mallorca, 30/03/09-01/04/09 New arfgen method: Integrate the PSF image

8. XMM EPIC SOC Richard Saxton Background, Operations & Calibration (BOC) meeting Mallorca, 30/03/09-01/04/09 Integrated PSF image technique

9. XMM EPIC SOC Richard Saxton Background, Operations & Calibration (BOC) meeting Mallorca, 30/03/09-01/04/09 Integrated PSF image technique Flux in inner 9 cols / flux in cols -4 to -2 and +2 to +4 -10% +10%

10. XMM EPIC SOC Richard Saxton Background, Operations & Calibration (BOC) meeting Mallorca, 30/03/09-01/04/09 Practical spectral fitting effects Spectrum NH=2.3E+22 Gauss = 6.44 keV 1.04 keV 0.02 Disk_T = 2.26 Bbod_T = 1.06 Tbabs (gauss*diskbb*bbod)

11. XMM EPIC SOC Richard Saxton Background, Operations & Calibration (BOC) meeting Mallorca, 30/03/09-01/04/09 Practical spectral fitting effects Original Spectrum NH=2.3E+22 Gauss = 6.44 keV 1.04 keV Disk_T = 2.26 Bbod_T = 1.06 * Linear ramp NH=2.32E+22 Gauss = 6.42±0.04 1.06±0.04 Disk_T = 2.40±0.09 * Ramp with extra at 6keV NH=2.34E+22 Gauss = 6.55±0.03 0.99±0.04 Disk_T = 2.34±0.09 Ignore Inner 3 cols Ignore Inner 5 cols +15% -10% +10% -10%

12. XMM EPIC SOC Richard Saxton Background, Operations & Calibration (BOC) meeting Mallorca, 30/03/09-01/04/09 MKN 421 simple power-law test Excluding inner 3 columns gives a 15% decrease in measured flux. Slope is stable.

13. XMM EPIC SOC Richard Saxton Background, Operations & Calibration (BOC) meeting Mallorca, 30/03/09-01/04/09 Conclusions  Major problem with ARF in SAS 8 when inner columns are excluded in timing mode observations.  New image integration technique fixes this  Residual problem at 15% level in flux if inner 3 cols excluded  Spectral parameters reasonably consistent so looking acceptable…