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MOS Cooling Results and Current Response

This study examines the cooling results of MOS cameras at different temperatures (-100C to -120C) and analyzes their current response. It includes plots and measurements of CTI (Charge Transfer Inefficiency), resolution, and contamination monitoring, along with comparison with current response data. Additionally, the study explores the low energy excess and epoch/flux dependent response variation.

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MOS Cooling Results and Current Response

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  1. MOS Cooling Results and Current Response Both MOS Cameras cooled to -120C from -100C Rev 533-534

  2. Parallel CTI at Mn and Al for Central CCDs, MOS1 and MOS2 Plots by Bruno Altieri

  3. Parallel CTI at Al, MOS1 Serial CTI at Al, MOS1 Plots by Bruno Altieri

  4. Parallel CTI at Al, MOS2 Serial CTI at Al, MOS2 Plots by Bruno Altieri

  5. Measured Resolution at Al, MOS1, CCD1

  6. Measured Resolution at Al, MOS2, CCD1

  7. Measured Resolution at Mn-Kalpha, MOS1/2, CCD1

  8. Isolated Neutron Star RX J0720.4-3125 used for contamination monitoring No evidence for contamination … similar for MOS2

  9. Vela pre- and post-cooling. No evidence for contamination

  10. Gain stability test on SNR 1E 0102.2-7219 Ne IX 247: 0.919 (0.002) 375: 0.921 (0.002) 552: 0.914 (0.003) Mg XI 247: 1.345 (0.002) 375: 1.344 (0.002) 552: 1.336 (0.004)

  11. Low Energy Epoch Dependent Response Variation

  12. Fit to MOS1/MOS2 spectra of Mrk 421 (Rev 165), using SAS 5.3

  13. Same as previous, but with data and model extrapolated down to 100 eV

  14. Fit to MOS1/MOS2 spectra of PKS2155-304 (Rev 450) using SAS 5.3

  15. Same as previous, but with data and model extrapolated down to 100 eV Low energy excess indicating response change ?

  16. Contribution to flux at 150 eV versus incident energy for each spectrum

  17. Significant change in spectrum between Rev 78 and 533/534

  18. Significant change in spectrum between Rev 78 and 533/534

  19. Comparison of Current Response fitted to Rev 78 data and Test Response Fitted to Rev 533 and Rev 534 NH = 1.39(0.5)E20 cm-2 BB = 82.4(1.5) eV

  20. Current and Test Redistribution at incident E = 250, 300, 350 and 400 eV

  21. Comparison of spectra extracted from Radii, 0-45, 5-45 and 10-45 arcsec

  22. How does Test Response work with other sources ? Not very well ! Power-Law fit with NH = 1.36E20 cm-2 Two observations from Rev 450 and 552

  23. Comparison with Current Response

  24. Quality of fit across main edges from 1 to 3 keV 5-10% Residual at 2.5 keV

  25. N132D … Evidence for flux/response change below 500 eV Plot by Marcus Kirsch

  26. Epoch/Flux dependency exhibited by 3C 273

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