spectro-aras.com

Hi Joan,

you always show some interesting results. It may well be possible, that looking at an angle on the top surface of Jupiter shows a polarisation effect. It would be interesting to know the theta values. On the other hand, if you move the image of Jupiter along the slit, caused by small guiding errors during your multiple exposures with different polarizations may also create a polarization artefact, because of different cutout of the selected area in the upper and lower spectrum. Iwould suggest you repeat the observation to make sure that the polarization effect is real.

Best regards,

Martin

Hallo Martin,

And all your feedback always encouraged me to review and try to improve things that I made.

You can see in the first picture only a Saturn  Theta Angle, because Saturn has a constant polarimetry % in its latitude regions, the oppositeof Jupiter. But it seems it's only a curiosity due to, some specialists said that the Theta Angle of the Solar System Bodies is useless, because their and our position is changing constantly. That is different in the stars that they carry the North Pole as a reference. Fig.1.

Also, it seems, the best way to show the polarization of the Planetary Bodies is this you can see in this graphic by the  polarimeter PICSARR,and for doing it with The-Giver results, it would be necessary to transform the results by virtual photometric filters, go back, and lose a lot ofinformation that one can see in the graphics.

Talking about that, and from my perspective as a learner, I don't understand why in the HPOL Database they had done it in all their spectropolarimetric observations, changing the polarimetric spectra in virtual photometric filters, losing a lot of information and valuable details too,and the worst thing, to alter the real perception of their users. Fig. 2.

About the little movements in declinations that you have related, I agree, I thought about it at the same time you warned me. In this way,I reduced just a single image from every angular series, you can see the results here. 

The Jupiter polarimetric % variations exist, but not in Saturn.


On the other hand, in Saturn, the graphics are different if you reduce the full planet image or by zones. Also, their Q and U values.

Best regards and thanks, Joan.