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EPIC-pn background in deep fields – taking a deep breath before diving

EPIC-pn background in deep fields – taking a deep breath before diving. Finoguenov Alexis. HDFS. LH. COSMOS. COSMOS 9.5-12 keV. 0.5-2 keV. COSMOS. Andy Read. 2-4.5 keV. Andy Read. COSMOS. OOTE. Singles vs doubles. Spectral comparison. After Renormalization. Clean Andy.

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EPIC-pn background in deep fields – taking a deep breath before diving

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  1. EPIC-pn background in deep fields – taking a deep breath before diving Finoguenov Alexis

  2. HDFS

  3. LH

  4. COSMOS

  5. COSMOS 9.5-12 keV

  6. 0.5-2 keV COSMOS Andy Read

  7. 2-4.5 keV Andy Read COSMOS

  8. OOTE

  9. Singles vs doubles

  10. Spectral comparison

  11. After Renormalization

  12. Clean Andy

  13. Detector Outskirts: the golden Mile

  14. .. and renormalized

  15. The effect of OOTE

  16. Is there some sky background in there?

  17. A msg from Andy Fabian

  18. Strategy for background subtraction • Observation is filtered for flares • We use the Filter wheel closed accumulation of Michael Freyberg for pn • The above is similar to De Luca & Molendi • We remove the sources identified by both Chandra and XMM (5-10% residual contamination) • Two regions are used to test the in-field background

  19. Components of the residual spectrum • Hard X-ray background: 0.9-1.0 slope • Galactic emission of 0.1 and 0.2 keV • Intrumental background: quiescent soft protons background slope 3 Flux is similar to total CXB

  20. Conclusions • Background in deep fields appears to be similar • Initial problems with use of Andy Read‘s or David Lumb‘s background seems to resolve in difference in the cleaning • A consistent answer to 2-10 keV Cosmoc background with De Luca&Molendi • Quiescent soft proton flux is not evolving during 2002-2004

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