1 / 94

Properties of EPIC pn at low energies: LW mode

Properties of EPIC pn at low energies: LW mode. Long closed LW exposures. EPIC-pn at low energies (LW). Correction of offset shifts. offset correction: before. rev 546. rev 553. offset correction: after. rev 546. rev 553. EPIC-pn detector noise (LW). residual offset map. rev 546.

tivona
Download Presentation

Properties of EPIC pn at low energies: LW mode

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Properties of EPIC pn at low energies: LW mode EPIC pn at low energies: LW mode

  2. Long closed LW exposures EPIC pn at low energies: LW mode

  3. EPIC-pn at low energies (LW) Correction of offset shifts EPIC pn at low energies: LW mode

  4. offset correction: before rev 546 rev 553 EPIC pn at low energies: LW mode

  5. offset correction: after rev 546 rev 553 EPIC pn at low energies: LW mode

  6. EPIC-pn detector noise (LW) residual offset map rev 546 EPIC pn at low energies: LW mode

  7. EPIC-pn detector noise (LW) residual offset map rev 553 EPIC pn at low energies: LW mode

  8. EPIC-pn detector noise (LW) residual offset map rev 730 EPIC pn at low energies: LW mode

  9. EPIC-pn detector noise (LW) residual offset map rev 790 EPIC pn at low energies: LW mode

  10. EPIC-pn detector noise (LW) residual offset map rev 974 EPIC pn at low energies: LW mode

  11. individual offset maps median of offset maps EPIC pn at low energies: LW mode

  12. residual offset maps rev 546 rev 790 EPIC pn at low energies: LW mode

  13. cleaned residual offset maps rev 546 rev 790 EPIC pn at low energies: LW mode

  14. rev 546 cleaned residual offset map residual offset map EPIC pn at low energies: LW mode

  15. 20 adu image, rev 546 EPIC pn at low energies: LW mode

  16. 20 adu image, rev 546 before the correction of offset shifts EPIC pn at low energies: LW mode

  17. 20 adu image, rev 546 after the correction of offset shifts EPIC pn at low energies: LW mode

  18. offset correction: before rev 546 rev 553 EPIC pn at low energies: LW mode

  19. offset correction: after rev 546 rev 553 EPIC pn at low energies: LW mode

  20. offset correction: before rev 730 rev 974 EPIC pn at low energies: LW mode

  21. offset correction: after rev 730 rev 974 EPIC pn at low energies: LW mode

  22. EPIC-pn at low energies (LW) Low energy noise EPIC pn at low energies: LW mode

  23. EPIC-pn detector noise 50.7 ks closed FF (rev 059) Quadrant 0 adu EPIC pn at low energies: LW mode

  24. Detector noise in FF and eFF mode FF detector noise per sec is ~2.16 times higher in FF than in eFF 2.16 : 1 eFF EPIC pn at low energies: LW mode

  25. Detector noise in FF and eFF mode FF LW detector noise per sec is ~2.16 times higher in FF than in eFF 2.16 : 1 eFF EPIC pn at low energies: LW mode

  26. LW 1.71 : 1 FF Detector noise in LW and FF mode detector noise per sec is ~1.7 times higher in LW than in FF* *in the LW area EPIC pn at low energies: LW mode

  27. EPIC pn at low energies: LW mode

  28. closed FF rev 462 23.2 ks 3 0 50 0 EPIC pn at low energies: LW mode

  29. Vela SNR FF rev 534 38.8 ks withoutepreject EPIC pn at low energies: LW mode

  30. Vela SNR FF rev 534 38.8 ks with epreject EPIC pn at low energies: LW mode

  31. EPIC-pn detector noise in LW mode EPIC pn at low energies: LW mode

  32. 20 50 adu EPIC-pn detector noise (LW) 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 100% suppression EPIC pn at low energies: LW mode

  33. 20 50 adu EPIC-pn detector noise (LW) 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 99% suppression EPIC pn at low energies: LW mode

  34. 20 50 adu EPIC-pn detector noise (LW) 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 90% suppression EPIC pn at low energies: LW mode

  35. 20 50 adu EPIC-pn detector noise (LW) 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 70% suppression EPIC pn at low energies: LW mode

  36. 20 50 adu EPIC-pn detector noise (LW) 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 50% suppression EPIC pn at low energies: LW mode

  37. 20 50 adu EPIC-pn detector noise (LW) • 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 at low energies: LW mode

  38. EPIC-pn detector noise (LW) Alternative method (“method 2”): Try to determine the noise properties at higher energies and extrapolate them down to 20 adu EPIC pn at low energies: LW mode

  39. EPIC-pn detector noise (LW) rev 790, all events range used for fit: 40-100 adu range shown: 20-400 adu log-log EPIC pn at low energies: LW mode

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

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

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

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

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

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

  46. EPIC-pn detector noise (LW) method 2, rev 790 EPIC pn at low energies: LW mode

  47. EPIC-pn detector noise (LW) method 2, rev 546 EPIC pn at low energies: LW mode

  48. EPIC-pn detector noise (LW) method 2, rev 553 EPIC pn at low energies: LW mode

  49. EPIC-pn detector noise (LW) method 2, rev 730 EPIC pn at low energies: LW mode

  50. EPIC-pn detector noise (LW) method 2, rev 974 EPIC pn at low energies: LW mode

More Related