June 04 ,2023 ; prominence in UV with spectro coronagraph

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ChrisHalpha2017
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June 04 ,2023 ; prominence in UV with spectro coronagraph

Post by ChrisHalpha2017 »

Hello ,
today a wonderfull day with no haze nor clouds.. and a beautifull prominence...
I tried the UV again and it was quite hard as I had to defocuse the refractor of about 12mm to get a sharp image of the prominence with 2 gratings : a 1200 lines @412nm and a 600 lines@ 500 nm...

But i'm pretty sure I would get better results once the collimator is refocused too in the UV.

H alpha with 600 lines /mm
tiff 600 2075 très nette  BEST +++++++++_20230604_131341.304_UT.jpg
tiff 600 2075 très nette BEST +++++++++_20230604_131341.304_UT.jpg (352.32 KiB) Viewed 875 times
tiff 600 tmm 2757  +++.jpg
tiff 600 tmm 2757 +++.jpg (702.29 KiB) Viewed 875 times

with 1200 lines/mm
1200 trmm.jpg
1200 trmm.jpg (421.82 KiB) Viewed 875 times

with the 1800 lines :
1800 tmm.jpg
1800 tmm.jpg (314.36 KiB) Viewed 875 times
and In the UV :

1200 lines @ 412nm
raie H K calcium.jpg
raie H K calcium.jpg (339.86 KiB) Viewed 875 times
and the 600 lines
600 trmm  UV ++++.jpg
600 trmm UV ++++.jpg (428.47 KiB) Viewed 875 times
Chris


spectro-coronographe ,Bresser 127/1200 ; Bresser 102/1350 , ASI 178MM
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Re: June 04 ,2023 ; prominence in UV with spectro coronagraph

Post by rsfoto »

Great


regards Rainer

Observatorio Real de 14
San Luis Potosi Mexico

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Re: June 04 ,2023 ; prominence in UV with spectro coronagraph

Post by highfnum »

great!
i knew you could do it
like that "other line on to will look for that next time I try



unfortunately clouds here today


ChrisHalpha2017
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Re: June 04 ,2023 ; prominence in UV with spectro coronagraph

Post by ChrisHalpha2017 »

Thanks very much :) But I will rebuilt my collimator with a focuser because to get sharper images the collimator should be set according the wavelength. it doesnt make much difference in the visible range but when its UV light it makes a big difference. Especially when the focal lenght of the collimator gets bigger..


spectro-coronographe ,Bresser 127/1200 ; Bresser 102/1350 , ASI 178MM
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