Analysis of the soft response of pn and MOS with a sample of blazars Silvano Molendi (IASF-MI)

Motivation Motivation Evaluate impact of mos eff. areas changeEvaluate impact of mos eff. areas change This is a major changeThis is a major change Impact on pn/mos cross calibration is possibly largest ever.

Example of old vs new pn/mos Example of old vs new pn/mos Residuals in the form of ratio data/model for PN data on MOS best fitting model

Example of old vs new pn/mos Example of old vs new pn/mos Residuals in the form of ratio data/model for PN data on MOS best fitting model

How How Sample of 21 blazars from XMM-Newton archiveSample of 21 blazars from XMM-Newton archive Featureless objects with simple pow-law spectraFeatureless objects with simple pow-law spectra Most have no reported evidence of intrinsic absorptionMost have no reported evidence of intrinsic absorption Look at spectral parameters, particularly N H, to evaluate changes following changes in MOS arfs.Look at spectral parameters, particularly N H, to evaluate changes following changes in MOS arfs.

The Sample The Sample All data reduced with SAS 7.1All data reduced with SAS 7.1 Emchain & Epchain + soft proton screeningEmchain & Epchain + soft proton screening some objects piled up (epatplot + reference cr from uhb sec Tab 3 )some objects piled up (epatplot + reference cr from uhb sec Tab 3 ) extraction in annuli (iterative core extrusion )extraction in annuli (iterative core extrusion ) arfs and rmfs generated using standard toolsarfs and rmfs generated using standard tools MOS1, MOS2 (pattern 0-12) and pn (0-4)MOS1, MOS2 (pattern 0-12) and pn (0-4) flag==0 for MOS and pnflag==0 for MOS and pn

The Exercise The Exercise All data reduced with SAS 7.1All data reduced with SAS 7.1 Emchain & Epchain + soft proton screeningEmchain & Epchain + soft proton screening some objects piled up (epatplot + reference cr from uhb sec Tab 3 )some objects piled up (epatplot + reference cr from uhb sec Tab 3 ) extraction in annuli (iterative core extrusion )extraction in annuli (iterative core extrusion ) arfs and rmfs generated using standard toolsarfs and rmfs generated using standard tools MOS1, MOS2 (pattern 0-12) and pn (0-4)MOS1, MOS2 (pattern 0-12) and pn (0-4)

The Exercise/2 The Exercise/2 For mos1 and mos2 generated old arfsFor mos1 and mos2 generated old arfs cifbuild analysisdate followed by arfgen cifbuild analysisdate followed by arfgen Spectra fit in keV band with “wabs*pow” model all params freeSpectra fit in keV band with “wabs*pow” model all params free Some 60 spectra 100 fitsSome 60 spectra 100 fits

Results Results Look at N H MOS1 vs MOS2 for old qe Look at N H MOS1 vs MOS2 for old qe

Results Results Look at N H MOS1 vs MOS2 for new qe Look at N H MOS1 vs MOS2 for new qe Agreement btwn MOS1 & MOS2 does not change

New vs Old - MOS1 New vs Old - MOS1

New vs Old – MOS2 New vs Old – MOS2

Points fall exactly on modelPoints fall exactly on model X 2 is less than 1X 2 is less than 1 Data is the same, only arf is differentData is the same, only arf is different The increase in O depth corresponds to an increase of N H, assuming standard O abundances, of 2x10 20The increase in O depth corresponds to an increase of N H, assuming standard O abundances, of 2x10 20

New MOS vs PN New MOS vs PN Very good agreement btwn MOS and PN!

X-ray vs 21cm N H X-ray vs 21cm N H old new

X-ray vs 21cm N H X-ray vs 21cm N H Excluded all objects with excised piled-up core old new

Very low N H objects Very low N H objects There are 6/17 objects with N H < Soft excess ? Possible for flat spectrum objects, unlikely for steep spectrum objects

Soft excess? Soft excess?

X-ray vs 21cm NH X-ray vs 21cm NH Exclude all objects with excised piled-up core

Summary Summary 1.New arfs result in smaller N H ~2x For the fist time we have good agreement btwn MOS and PN 3.The blazar exercise failed its major goal, it did not help us in establishing which of the two arfs is better.

Very low NH objects Very low NH objects There are 6/17 objects with NH < Soft excess ?