1. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode Properties of EPIC pn at low energies: LW mode

2. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode Long closed LW exposures revolutiondata setexposure [s]date 05460134522001_PNS00518 7602002-12-03 05530125320901_PNS01012 2672002-12-17 07300154150601_PNS00212 1982003-12-05 07900134720801_PNS00561 0962004-04-01 09740305920301_PNU02712 5342005-04-04 116 855

3. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn at low energies (LW) Correction of offset shifts

4. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode rev 546rev 553 offset correction: before

5. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode rev 546rev 553 offset correction: after

6. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode rev 546 EPIC-pn detector noise (LW) residual offset map

7. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (LW) rev 553 residual offset map

8. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (LW) rev 730 residual offset map

9. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (LW) rev 790 residual offset map

10. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (LW) rev 974 residual offset map

11. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode individual offset maps median of offset maps

12. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode residual offset maps rev 546rev 790

13. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode rev 546rev 790 cleaned residual offset maps

14. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode rev 546 cleaned residual offset map residual offset map

15. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode 20 adu image, rev 546

16. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode 20 adu image, rev 546 before the correction of offset shifts

17. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode 20 adu image, rev 546 after the correction of offset shifts

18. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode rev 546rev 553 offset correction: before

19. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode rev 546rev 553 offset correction: after

20. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode rev 730rev 974 offset correction: before

21. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode rev 730rev 974 offset correction: after

22. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode Low energy noise EPIC-pn at low energies (LW)

23. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode adu Quadrant 0 50.7 ks closed FF (rev 059) EPIC-pn detector noise

24. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode 2.16 : 1 Detector noise in FF and eFF mode FF eFF per sec detector noise per sec is ~2.16 times higher in FF than in eFF

25. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode 2.16 : 1 Detector noise in FF and eFF mode FF eFF per sec detector noise per sec is ~2.16 times higher in FF than in eFF LW

26. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode Detector noise in LW and FF mode 1.71 : 1 LW FF per sec detector noise per sec is ~1.7 times higher in LW than in FF * * in the LW area

27. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode

28. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode closed FF rev 462 23.2 ks 0500 3

29. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode Vela SNR FF rev 534 38.8 ks without epreject

30. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode with epreject Vela SNR FF rev 534 38.8 ks

31. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise in LW mode

32. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (LW) 100% suppression Original method (“method 1”): Suppression of events below 50 adu according to a reference noise distribution deduced from long calclosed exposures Shown in blue is the result of this method applied to a (long) calclosed exposure, to illustrate the effect on a very faint X-ray source 2050 adu

33. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (LW) 2050 adu 99% suppression Original method (“method 1”): Suppression of events below 50 adu according to a reference noise distribution deduced from long calclosed exposures Shown in blue is the result of this method applied to a (long) calclosed exposure, to illustrate the effect on a very faint X-ray source

34. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (LW) 2050 adu 90% suppression Original method (“method 1”): Suppression of events below 50 adu according to a reference noise distribution deduced from long calclosed exposures Shown in blue is the result of this method applied to a (long) calclosed exposure, to illustrate the effect on a very faint X-ray source

35. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (LW) 2050 adu 70% suppression Original method (“method 1”): Suppression of events below 50 adu according to a reference noise distribution deduced from long calclosed exposures Shown in blue is the result of this method applied to a (long) calclosed exposure, to illustrate the effect on a very faint X-ray source

36. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (LW) 2050 adu 50% suppression Original method (“method 1”): Suppression of events below 50 adu according to a reference noise distribution deduced from long calclosed exposures Shown in blue is the result of this method applied to a (long) calclosed exposure, to illustrate the effect on a very faint X-ray source

37. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode  This method works well for bright sources, but may cause an apparent deficit of photons between ~150 and 250 eV for faint sources  Other problem: inhomogeneous residual noise at ~20 adu EPIC-pn detector noise (LW) 2050 adu

38. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode Alternative method (“method 2”): Try to determine the noise properties at higher energies and extrapolate them down to 20 adu EPIC-pn detector noise (LW)

39. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode range used for fit: 40-100 adu range shown: 20-400 adu log-log EPIC-pn detector noise (LW) rev 790, all events

40. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (LW) range used for fit: 40-100 adu range shown: 20-400 adu x lin y log rev 790, all events

41. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (LW) range used for fit: 40-100 adu range shown: 20-100 adu x lin y log rev 790, all events

42. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (LW) range used for fit: 40-100 adu range shown: 20-400 adu x lin y log rev 790, all events

43. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (LW) range used for fit: 40-100 adu range shown: 20-400 adu x log y log rev 790, all events

44. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (LW) range used for fit: 40-100 adu range shown: 20-400 adu x log y log rev 790, all events

45. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode for comparison: method 1 EPIC-pn detector noise (LW) range used for fit: 40-100 adu range shown: 20-400 adu x log y log rev 790, all events

46. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode method 2, rev 790 EPIC-pn detector noise (LW)

47. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (LW) method 2, rev 546

48. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (LW) method 2, rev 553

49. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (LW) method 2, rev 730

50. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (LW) method 2, rev 974

51. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode  Method 2 would work well if there were no temporal changes of the low-energy noise Whenever the noise properties of the sample and template are (slightly) different, the subtraction leads to residuals in the spectra and the images Other problem: assumption of constant noise properties along CCD rows (required in order to get enough statistics) not valid for raw events: EPIC-pn detector noise (LW)

52. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (LW) rev 790 61 ks closed after offset corrections all events 20 adu

53. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (LW) rev 790 61 ks closed after offset corrections all events 21 adu

54. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (LW) rev 790 61 ks closed after offset corrections all events 22 adu

55. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (LW) rev 790 61 ks closed after offset corrections all events 23 adu

56. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (LW) rev 790 61 ks closed after offset corrections all events 24 adu

57. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (LW) rev 790 61 ks closed after offset corrections all events 25 adu

58. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (LW) rev 790 61 ks closed after offset corrections all events 26 adu

59. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (LW) rev 790 61 ks closed after offset corrections all events 27 adu

60. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (LW) rev 790 61 ks closed after offset corrections all events 28 adu

61. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (LW) rev 790 61 ks closed after offset corrections all events 29 adu

62. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (LW) rev 790 61 ks closed after offset corrections all events 30 adu

63. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (LW) rev 790 61 ks closed after offset corrections all events 31-35 adu

64. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (LW) rev 790 61 ks closed after offset corrections all events 36-40 adu

65. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (LW) rev 790 61 ks closed after offset corrections all events 41-45 adu

66. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (LW) rev 790 61 ks closed after offset corrections all events 46-50 adu

67. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (LW) rev 790 61 ks closed after offset corrections all events 51-55 adu

68. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (LW) rev 790 61 ks closed after offset corrections all events 56-60 adu

69. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (LW) rev 790 61 ks closed after offset corrections all events 61-70 adu

70. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (LW) rev 790 61 ks closed after offset corrections all events 71-80 adu

71. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (LW) rev 790 61 ks closed after offset corrections all events 81-90 adu

72. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (LW) rev 790 61 ks closed after offset corrections all events 91-100 adu

73. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (LW) rev 790 61 ks closed after offset corrections all events 101-120 adu

74. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (LW) rev 790 61 ks closed after offset corrections all events 121-140 adu

75. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (LW) rev 790 61 ks closed after offset corrections all events 141-180 adu

76. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (LW) rev 790 61 ks closed after offset corrections all events 181-250 adu

77. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (LW) rev 790 61 ks closed after offset corrections all events 251-400 adu

78. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (LW) At which stage of the processing should the noise be suppressed ? Comparison of raw data with processed data (after pattern recognition and recombination):

79. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (LW) rev 790 61 ks closed no offset corrections all events 20 adu raw data

80. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (LW) rev 790 61 ks closed no offset corrections singles 20 adu processed data

81. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (LW) rev 790 61 ks closed no offset corrections all events 30-50 adu raw data

82. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (LW) rev 790 61 ks closed no offset corrections all “entries” 30-50 adu processed data

83. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (LW) rev 790 61 ks closed no offset corrections non-singles 30-50 adu processed data

84. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (LW) rev 790 61 ks closed no offset corrections singles 30-50 adu processed data

85. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode Comparison with FF: EPIC-pn detector noise

86. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (FF) 20 adu raw data rev 462 23 ks closed no offset corrections all events

87. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (FF) rev 462 23 ks closed no offset corrections singles 20 adu processed data

88. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (FF) rev 462 23 ks closed no offset corrections all events 30-50 adu raw data

89. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (FF) rev 462 23 ks closed no offset corrections all “entries” 30-50 adu processed data

90. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (FF) rev 462 23 ks closed no offset corrections non-singles 30-50 adu processed data

91. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise (FF) rev 462 23 ks closed no offset corrections singles 30-50 adu processed data

92. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode EPIC-pn detector noise At which stage of the processing should the noise be suppressed ?  Noise near the CCD edges can be most efficiently suppressed by rejecting invalid patterns  Noise suppression should be done after the pattern recognition

93. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode raw_y 20-65 adu noise EPIC-pn detector noise properties (FF) SAS CCF:  Also for FF, epreject may need some refinement..

94. EPIC Calibration Meeting, MPE K. Dennerl, 2006 May 04 EPIC pn at low energies: LW mode