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3x3 binning pattern experiment

This experiment aims to compare the pattern distributions of 3x3 binned event lists to normal event lists, analyze the correlation with CCF, create pattern distribution fractions for the 3x3 mode, and scale the CCF accordingly. Future work includes examining gain, spectral differences, MOS2 data, additional observations, background subtraction, and creating a new 3x3 QE CCF.

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3x3 binning pattern experiment

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  1. Richard (Tao) Song , Jenny Carter, Steve Sembay University of Leicester 3x3 binning pattern experiment

  2. Aims • See how different pattern distributions for 3x3 binned event list is from ‘normal’ event list • Check the normal event list pattern distributions against the CCF • Create pattern distribution fractions for the 3x3 mode • Eventually create a nice QE CCF for the 3x3 binning mode • Use recent observation of Vela SNR: • Normal: • DATE-OBS: 2007-05-01T19:03:57 • LIVETIME : 47.8 ks • NAXIS2 : 1139927 • 3x3 binning: • DATE-OBS: 2007-05-02T09:00:01 • LIVETIME : 31.4 ks • NAXIS2 : 3057523

  3. Selection region for analysis Excluding bright col. here

  4. Comparing normal event list to CCF pattern distribution - PHA

  5. Comparing normal event list to CCF pattern distribution - PI

  6. Fitting • Use logarithmic binning and spline fitting

  7. PHA PHA – 3x3

  8. PI PI – 3x3

  9. PHA PI

  10. Scaling CCF • Use ratio 3x3 binning to normal and use this scale factor to scale the CCF • File: EMOS1_QUANTUMEFF_0017.CCF • Extensions FRACTION_CHANNEL, FRACTION_ENERGY Red is the 3x3 fraction distribution, green is the normal binning distribution

  11. Future work and conclusions • Check gain etc. of the 3x3 mode • Look at spectral differences between normal and 3x3 binning • Apply background subtraction to current analysis • Look at MOS2 • Compare with any more observations • Apply the ratio found to the current CCF, give to RS…. • …create a new 3x3 QE CCF

  12. Extra slides

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