Документ взят из кэша поисковой машины. Адрес оригинального документа : http://xmm.vilspa.esa.es/calibration/documentation/epic_cal_meetings/200704/Marshall.pdf Дата изменения: Tue May 13 17:54:12 2014 Дата индексирования: Wed Apr 13 13:18:54 2016 Кодировка: Поисковые слова: dra

Comparing Fluxes in Ban dpasses
Her man L. Marshall MIT Kavli Institute


Ban dpass Flux Measurement Metho ds
Fit global mo del, compute flux from mo del (xspec) Fit mo del in ban d, compute flux in ban d from mo del (xspec) Sum fluxes for grating resolution elements feasible due to narrow spectral response


Prev. Flux Comparisons

± 5%

From HLM presentation in Mallorca, 2006


Prev. Flux Comparisons

From HLM presentation in Mallorca, 2006


Chan dra fluxes OK

From Michael Smith's analysis


LEG fluxes low MEG fluxes low

From Michael Smith's analysis


Comparing Fluxes
Compare to values from 8-10 global fits 0.54- 0.85 keV ban d: LEG direct fluxes are 15% low; MEG agrees to 1% 0.85-1.50 keV ban d: LEG direct fluxes are 7% low MEG an d HEG fluxes are both 2-3% low 1.50 -4.00 keV ban d LEG direct fluxes are 1% low -- OK MEG an d HEG fluxes are w/in 1% -- OK Fluxes differ by 5-10% (stat <= 1%) HLM action: check LETGS results