Документ взят из кэша поисковой машины. Адрес оригинального документа : http://xmm.vilspa.esa.es/calibration/documentation/epic_cal_meetings/201203/smith-cal-2012-3.pdf Дата изменения: Tue May 13 17:39:17 2014 Дата индексирования: Wed Apr 13 13:33:42 2016 Кодировка: Поисковые слова: universe

EPIC-pn RMF Modelling

Michael Smith, ESAC


From MOS to PN

S. Sembay, 2010:
In principle, the same method could be applied to the calibration of the PN response. PN response quite stable and calibration advanced so the method will not have a major impact. However, it could provide helpful pointers to possible tweaks.

EPIC-pn RMF Modelling | Michael Smith | EPIC-BOC | Leicester, March 2012 | Pag.


MOS versus PN Redistribution

1.3 keV

2.5 keV

EPIC-pn RMF Modelling | Michael Smith | EPIC-BOC | Leicester, March 2012 | Pag.


PN Redistribution Model

Redistribution model should at the very minimum be able to reproduce current PN RMF.

EPIC-pn RMF Modelling | Michael Smith | EPIC-BOC | Leicester, March 2012 | Pag.


PN Redistribution Model

Main Voigt-Gauss Main Gauss Main Shelf

EPIC-pn RMF Modelling | Michael Smith | EPIC-BOC | Leicester, March 2012 | Pag.


PN Redistribution Model

Escape Gauss Escape Shelf

Main Voigt-Gauss Main Gauss Main Shelf

EPIC-pn RMF Modelling | Michael Smith | EPIC-BOC | Leicester, March 2012 | Pag.


PN Redistribution Model

Noise Shelf

Escape Gauss Escape Shelf

Main Voigt-Gauss Main Gauss Main Shelf

EPIC-pn RMF Modelling | Michael Smith | EPIC-BOC | Leicester, March 2012 | Pag.


Parameter Energy Dependence

R(E0) determined by 6 components: 20 model parameters, 16 of which have an energy dependence.
Main Voigt-Gauss E Width V Width G Dampen Norm Main Gauss E Width Norm Main Shelf E Cut-Off Slope Norm E
0

a1 + b1 sqrt(E0) = Width V a2 exp(b2-E0/c2) a3 exp(b3-E0/c3) E
0

Escape Gauss

E Width Norm

E0 ­ 1.739 a6 + b6 sqrt(E0) TBD a9 * E0 Frozen TBD Noise Shelf E Cut-Off Slope Norm Frozen Frozen TBD

= Width V TBD a7 * E0 Frozen TBD Escape Shelf

E Cut-Off Slope Norm

Complete energy dependence still to be determined. However, probably ~ 30 free parameters in current model definition. Model may need to be simplified.
EPIC-pn RMF Modelling | Michael Smith | EPIC-BOC | Leicester, March 2012 | Pag.