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Sunrise Inversion Strategies in the IMaX Spectral Environment

Explore the inversion strategies by Andreas Lagg in the IMaX spectral environment, utilizing the FTS for precise measurements. The study focuses on parameters such as B-strength, LOS-velocity, and source function gradients using inversion codes like VFISV and HeLiX+. Test data from 2009-06-09 reveals insights into the local straylight correction and highlights the use of Milne-Eddington inversion for accurate results.

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Sunrise Inversion Strategies in the IMaX Spectral Environment

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  1. Sunrise inversionStrategies Andreas Lagg

  2. The IMaXspectralenvironment

  3. The IMaXspectralenvironment

  4. The IMaXspectralenvironment

  5. The relevant environment FTS FTS * 85mA Gauss

  6. The relevant environment FTS * 85mA Gauss

  7. The relevant environment FTS * 85mA Gauss, 6 km/s upflow

  8. Milne-Eddington Inversion • 8 freeparameters:B-strength, -azimuth, -inclinationLOS-velocityDoppler-broadeningDampingparametersourcefunctiongradientsourcefunctionatτ=0 • 85 mÅ FWHM Gaussianconvolution IMaX filter • Inversion Codes:VFISV (Borrero), HeLiX+ (Lagg), … • Test Data Set: • 2009-06-09, 163-208

  9. VFISV: Continuumlevel 2009-06-09, 163-208

  10. VFISV: LOS-Velocity 2009-06-09, 163-208

  11. VFISV: Inclination 2009-06-09, 163-208

  12. VFISV: Azimuth 2009-06-09, 163-208

  13. VFISV: B (FF=1) 2009-06-09, 163-208

  14. HeLIx+: B(FF=1) 2009-06-09, 163-208

  15. localstraylightcorrection weight 1 additional freeparameter (FF) 2009-06-09, 163-208

  16. HeLIx+: B(FF=1), nolocalstraylight 2009-06-09, 163-208

  17. HeLIx+: Add localstraylight, BxFF 2009-06-09, 163-208

  18. HeLIx+: localstraylight, B strength 2009-06-09, 163-208

  19. HeLIx+: localstraylight, B inclination 2009-06-09, 163-208

  20. HeLIx+: localstraylight, magn. FF 2009-06-09, 163-208

  21. HeLIx+: localstraylight, B strength high B (1.5 kG)B vert. (11°)high FF (0.75) 2009-06-09, 163-208

  22. HeLIx+: localstraylight, B strength low B (110 G)B horiz (93°)high FF (0.75) 2009-06-09, 163-208

  23. HeLIx+: localstraylight, B strength 2009-06-09, 163-208

  24. HeLIx+: LOS-velocity, magn. comp. 2009-06-09, 163-208

  25. Inversions: ME vs. numerical RTE solver • 8 freeparameters: • B-strength • B-azimuth • B-inclination • LOS-velocity • Doppler-broad. • Dampingparameter • sourcefunc grad • sourcefuncatτ=0 • fast & simple • 7 freeparameters: • B-strength • B-azimuth • B-inclination • LOS-velocity • Micro-Turbulence • Macro-Turbulence • Temperatureatτ=0 • ‚physical‘ param. • multi-line • complexatmosphereeg. gradients • slow

  26. SPINOR Fit to FTS caneasily handle ±6km/s

  27. Milne Eddington Num. RTE Solver

  28. Milne Eddington Num. RTE Solver

  29. Summary & Outlook • Goodagreement:VFISV ↔ HeLIx+ ↔ SPINORmagnetographformula? • LocalStraylightcorrectionisfeasible • Numerical RTE Solver (SPINOR) promising • Determinecorrectparametersforlocalstraylightcorrection (limbdata) • implementlocal-straylightto SPINOR • compare VFISV ↔ SPINOR maps • high LOS velocities: testlineblending • strong fieldregions: test VLOS, B-gradient

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