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Cosmic Ray Anisotropy

Cosmic Ray Anisotropy. Brian Kolterman LANL December 2006. The Hill. Trigger Rate. Dec. H.A. Time Binning. Sidereal: coordinates fixed with respect to background stars Universal: solar time, displays day-night effects as well as Compton-Getting effect

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Cosmic Ray Anisotropy

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  1. Cosmic Ray Anisotropy Brian Kolterman LANL December 2006

  2. The Hill Trigger Rate Dec. H.A.

  3. Time Binning • Sidereal: coordinates fixed with respect to background stars • Universal: solar time, displays day-night effects as well as Compton-Getting effect • Anti-Sidereal: non-physical, added for test of “sidebands”

  4. Forward Backward Asymmetry B F

  5. Forward Backward Asymmetry

  6. Determining the Fourier components of the Sky Anisotropy

  7. Sidereal Sky Map (Six Years)

  8. Sidereal Sky Profiles (Six Years)

  9. Sidereal Sky Profiles (Six Years)

  10. Sidereal Sky (1st & 2nd 3 Years)

  11. Sid. Profiles (1st & 2nd 3 Years)

  12. Central Valley Position

  13. Central Valley Depth

  14. Central Valley Depth

  15. Fit Parameters

  16. Energy Dependence

  17. Energy Dependence 2.3 TeV 4.0 TeV

  18. Energy Dependence

  19. Systematic Checks • Valley Position in UT & Anti-ST • UT Compton-Getting effect • Anti-Sidereal Analysis • Seasonal Effects • Stability of Fitting Procedure • Monte Carlo • Coronal Mass Ejections

  20. Valley Position in UT & Anti-ST

  21. UT Compton-Getting Effect (1935) CR Excess 6 UT SUN 12 UT EARTH 0 UT CR Deficit 18 UT

  22. Universal Time Sky Map

  23. Universal Time Profiles

  24. Anti-Sidereal Sky Map

  25. Seasonal Sky Maps Winter-Spring = Nov. - Apr. Spring-Summer = Apr. - Jul. Summer-Fall = Jul. - Nov.

  26. Stability of Fitting Procedure Yr 1 Yr 6

  27. Monte Carlo Checks • No Anisotropy • Reproduction of Observed Sky (w/scaling) • Square Hole Input (ST & UT) • Galactic Ridge • Sidereal Sky With Inner Galaxy Removed • UT Modulation (Seasonal Effects)

  28. Monte Carlo Checks

  29. Monte Carlo Checks

  30. Monte Carlo Checks

  31. Monte Carlo Checks Input Output

  32. Sidereal Sky Map

  33. Coronal Mass Ejections Apr. 12 2001 Before After

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