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
XMM EPIC SOC Richard Saxton Background, Operations & Calibration (BOC) meeting Mallorca, 30/03/09-01/04/09 Columns in Timing mode
XMM EPIC SOC Richard Saxton Background, Operations & Calibration (BOC) meeting Mallorca, 30/03/09-01/04/09 Current SAS: Flux per column Col Constant Fit to Vela with: Const * wabs * plaw
XMM EPIC SOC Richard Saxton Background, Operations & Calibration (BOC) meeting Mallorca, 30/03/09-01/04/09 SAS 8 arfgen - GX (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
XMM EPIC SOC Richard Saxton Background, Operations & Calibration (BOC) meeting Mallorca, 30/03/09-01/04/09 SAS 8 arfgen (600 c/s) 1254
XMM EPIC SOC Richard Saxton Background, Operations & Calibration (BOC) meeting Mallorca, 30/03/09-01/04/09 SAS 8: Add up annular contriutions
XMM EPIC SOC Richard Saxton Background, Operations & Calibration (BOC) meeting Mallorca, 30/03/09-01/04/09 New arfgen method: Integrate the PSF image
XMM EPIC SOC Richard Saxton Background, Operations & Calibration (BOC) meeting Mallorca, 30/03/09-01/04/09 Integrated PSF image technique
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 % +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)
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 Disk_T = 2.40±0.09 * Ramp with extra at 6keV NH=2.34E+22 Gauss = 6.55± ±0.04 Disk_T = 2.34±0.09 Ignore Inner 3 cols Ignore Inner 5 cols +15% -10% +10% -10%
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.
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…