Search found 302 matches

by stef41
Tue May 04, 2021 1:51 pm
Forum: This is SolarChat !!
Topic: Solar Physics 2021 book
Replies: 12
Views: 218

Re: Solar Physics 2021 book

Montana wrote: Mon May 03, 2021 3:26 pm Or Christian's new book in English out later this month http://www.astronomiesolaire.com/
I'm sure these are much more interesting and cheaper too.

Alexandra
it's the top ! ;)
soon in english :)

cordially,
stephane
by stef41
Fri Apr 30, 2021 12:16 pm
Forum: This is SolarChat !!
Topic: halpha sun on 30 April
Replies: 8
Views: 102

halpha sun on 30 April

good morning to all,

sunshine in a milky (and now totally overcast) sky at the fs60 with its sm40 double stack, BF10, glasspath x1.7 and zwo178mm around 09h30 UT
S20210430-09h28UT-sm40DS-fs60-bf10-gpx1.7-asi178mm.jpg
S20210430-09h28UT-sm40DS-fs60-bf10-gpx1.7-asi178mm.jpg (969.38 KiB) Viewed 102 times
S20210430-09h29UT-sm40DS-fs60-bf10-gpx1.7-asi178mm.jpg
S20210430-09h29UT-sm40DS-fs60-bf10-gpx1.7-asi178mm.jpg (1.04 MiB) Viewed 102 times
cordially
stephane
by stef41
Mon Apr 26, 2021 7:39 pm
Forum: This is SolarChat !!
Topic: Halpha animation: AR2820 on 24 April
Replies: 3
Views: 41

Halpha animation: AR2820 on 24 April

good evening to all, a small animation made last Saturday between 10:24 and 12:31 UT on the fs60 with its sm40 double stack, BF10, barlow lens x2 in ADC and zwo178mm on staradventurer 102 films of 900 frames per minute autostakkert, photoshop, registax and virtualdub processing Gif at 7 fps (9MB) ht...
by stef41
Mon Apr 26, 2021 7:17 pm
Forum: This is SolarChat !!
Topic: halpha sun on 26 April
Replies: 3
Views: 57

halpha sun on 26 April

hello to all,

end of holidays, late afternoon sun from France :) to the fs60 with its sm40 double stack, BF10, glasspath x1.7 and zwo178mm around 16h30 UT
S20210426-16h27UT-sm40DS-fs60-bf10-gpx1.7-asi178mm.jpg
S20210426-16h27UT-sm40DS-fs60-bf10-gpx1.7-asi178mm.jpg (1.18 MiB) Viewed 57 times
S20210426-16h28UT-sm40DS-fs60-bf10-gpx1.7-asi178mm.jpg
S20210426-16h28UT-sm40DS-fs60-bf10-gpx1.7-asi178mm.jpg (1.19 MiB) Viewed 57 times
cordially
stephane
by stef41
Mon Apr 26, 2021 7:15 pm
Forum: This is SolarChat !!
Topic: halpha sun on 25 April
Replies: 7
Views: 69

Re: halpha sun on 25 April

thanks to you :) Can you please explain how you achieve this? Do you take two different photos, or is it the same photo with a darker version over the light (prom) one? recurring question ;) yes, I make two films: one with just the contrasted disc (gamma 60) and the other with the saturated disc and...
by stef41
Sun Apr 25, 2021 4:46 pm
Forum: This is SolarChat !!
Topic: halpha sun on 25 April
Replies: 7
Views: 69

halpha sun on 25 April

hello everyone,

the sun around 10am UT at the fs60 with its sm40 double stack, BF10, glasspath x1.7 and zwo178mm
S20210425-10h02UT-sm40DS-fs60-bf10-gpx1.7-asi178mm.jpg
S20210425-10h02UT-sm40DS-fs60-bf10-gpx1.7-asi178mm.jpg (1.13 MiB) Viewed 69 times
S20210425-10h03UT-sm40DS-fs60-bf10-gpx1.7-asi178mm.jpg
S20210425-10h03UT-sm40DS-fs60-bf10-gpx1.7-asi178mm.jpg (1.16 MiB) Viewed 69 times
cordially
stephane
by stef41
Sat Apr 24, 2021 4:42 pm
Forum: This is SolarChat !!
Topic: halpha sun on 24 April
Replies: 3
Views: 59

halpha sun on 24 April

good morning to all, a big blue sky (see coronal limit for me, in Beauce (France); which does not happen every day!) to visit the sun again with the fs60 with its sm40 double stack, BF10, glasspath x1.7 and zwo178mm around 10:25 UT S20210424-10h23UT-sm40DS-fs60-bf10-gpx1.7-asi178mm.jpg S20210424-10h...
by stef41
Fri Apr 23, 2021 3:24 pm
Forum: This is SolarChat !!
Topic: halpha solar animation on 22 April
Replies: 4
Views: 48

halpha solar animation on 22 April

Hello to all, I would have liked to do it on April 21 but the clouds prevented me from doing it. On the 22nd, no more clouds but quite a lot of wind in gust and a fluctuating transparency but we can still see a nicely active prominence. At the fs60 with its sm40 double stack, BF10, barlow lens x2 in...
by stef41
Fri Apr 23, 2021 12:31 pm
Forum: This is SolarChat !!
Topic: halpha sun of 23 April
Replies: 4
Views: 50

halpha sun of 23 April

good morning to all,

sun of the day around 10h30 UT at the fs60 with its sm40 double stack, BF10, glasspath x1.7 and zwo178mm
S20210423-10h31UT-sm40DS-fs60-bf10-gpx1.7-asi178mm.jpg
S20210423-10h31UT-sm40DS-fs60-bf10-gpx1.7-asi178mm.jpg (1.39 MiB) Viewed 50 times
S20210423-10h32UT-sm40DS-fs60-bf10-gpx1.7-asi178mm.jpg
S20210423-10h32UT-sm40DS-fs60-bf10-gpx1.7-asi178mm.jpg (1.59 MiB) Viewed 50 times
cordially
stephane
by stef41
Fri Apr 23, 2021 12:29 pm
Forum: This is SolarChat !!
Topic: halpha sun on 22 April
Replies: 9
Views: 91

Re: halpha sun on 22 April

thank you all :) I thought strong wind was not good for imaging ?? especially with the little staradventurer: the slightest breeze shakes everything up! ;) Do you have any details available on how you attach your glasspath to your BF10? the glasspath is not in the BF10 it is directly at the entrance...
by stef41
Thu Apr 22, 2021 7:07 pm
Forum: This is SolarChat !!
Topic: halpha sun on 22 April
Replies: 9
Views: 91

halpha sun on 22 April

Hello to all, a slightly milky sky and quite a bit of wind in my area but still, a great weather to shoot our star :) At the fs60 with his sm40 double stack, BF10, glasspath x1.7 and zwo178mm on staradventurer around 10:15 UT S20210422-10h14UT-sm40DS-fs60-bf10-gpx1.7-asi178mm.jpg S20210422-10h15UT-s...
by stef41
Wed Apr 21, 2021 1:20 pm
Forum: This is SolarChat !!
Topic: halpha sun on 21 April
Replies: 5
Views: 69

halpha sun on 21 April

good morning to all, a pre-cloud sun at fs60 and sm40 double stack, BF10, glasspath x1.7 and zwo178mm around 10:10 UT S20210421-10h05UT-sm40DS-fs60-bf10-gpx1.7-asi178mm.jpg S20210421-10h07UT-sm40DS-fs60-bf10-gpx1.7-asi178mm.jpg With barlow lens x2 and ADC It's a pity that the clouds arrived because ...
by stef41
Tue Apr 20, 2021 6:59 pm
Forum: This is SolarChat !!
Topic: halpha sun on 19 April
Replies: 10
Views: 133

Re: halpha sun on 19 April

thanks to all :)
Ivan wrote: Mon Apr 19, 2021 6:20 pm Douce France ...
Stephane, what is the shutter speed and number of frames?
for the second image:
Shutter=1.907ms
Gain=100
FPS (avg.)=27
666 images added to a film of 2000 images (33%) with astrosurface

sincerely
stéphane
by stef41
Tue Apr 20, 2021 6:49 pm
Forum: This is SolarChat !!
Topic: halpha sun on 20 April
Replies: 5
Views: 88

halpha sun on 20 April

good evening to all,

the sun today with a slightly cloudy sky around 10:20 UT at the fs60 with its sm40 double stack, BF10, glasspath x1.7 and zwo178mm
S20210420-10h19UT-sm40DS-fs60-bf10-gpx1.7-asi178mm.jpg
S20210420-10h19UT-sm40DS-fs60-bf10-gpx1.7-asi178mm.jpg (1.48 MiB) Viewed 88 times
S20210420-10h21UT-sm40DS-fs60-bf10-gpx1.7-asi178mm.jpg
S20210420-10h21UT-sm40DS-fs60-bf10-gpx1.7-asi178mm.jpg (1.65 MiB) Viewed 88 times
Sincerely
stephane
by stef41
Mon Apr 19, 2021 5:33 pm
Forum: This is SolarChat !!
Topic: halpha sun on 19 April
Replies: 10
Views: 133

halpha sun on 19 April

good morning to all,

a late afternoon sun in France at the fs60 with its sm40 double stack, BF10, glasspath x1.7 and zwo178mm around 15h25 UT
S20210419-15h25UT-sm40DS-fs60-bf10-gpx1.7-asi178mm.jpg
S20210419-15h25UT-sm40DS-fs60-bf10-gpx1.7-asi178mm.jpg (1.37 MiB) Viewed 133 times
S20210419-15h26UT-sm40DS-fs60-bf10-gpx1.7-asi178mm.jpg
S20210419-15h26UT-sm40DS-fs60-bf10-gpx1.7-asi178mm.jpg (1.45 MiB) Viewed 133 times
cordially
stephane
by stef41
Sun Apr 18, 2021 4:02 pm
Forum: This is SolarChat !!
Topic: halpha sun on 18 April
Replies: 5
Views: 80

halpha sun on 18 April

good morning to all,

sunshine before the clouds arrive at fs60 and sm40 double stack, BF10, glasspath x1.7, zwo178mm around 10:10 UT
S20210418-10h11UT-sm40DS-fs60-bf10-gpx1.7-asi178mm.jpg
S20210418-10h11UT-sm40DS-fs60-bf10-gpx1.7-asi178mm.jpg (1.48 MiB) Viewed 80 times
S20210418-10h12UT-sm40DS-fs60-bf10-gpx1.7-asi178mm.jpg
S20210418-10h12UT-sm40DS-fs60-bf10-gpx1.7-asi178mm.jpg (1.69 MiB) Viewed 80 times
cordially
stephane
by stef41
Sat Apr 17, 2021 12:46 pm
Forum: This is SolarChat !!
Topic: halpha sun on 17 April
Replies: 9
Views: 133

halpha sun on 17 April

good morning to all, a quick sun before the sky is completely overcast at home at the fs60 with its sm40 double stack, BF10, glasspath x1.7 and zwo178mm around 10h30 UT S20210417-10h36UT-sm40DS-fs60-bf10-gpx1.7-asi178mm.jpg S20210417-10h37UT-sm40DS-fs60-bf10-gpx1.7-asi178mm.jpg Sincerely stephane
by stef41
Fri Apr 16, 2021 5:30 pm
Forum: This is SolarChat !!
Topic: halpha solar animation on 14 April
Replies: 7
Views: 87

Re: halpha solar animation on 14 April

thank you all :) Hi Stephane, Very nice animation, excellent work. Please can you explain Stephane: 1) What is FS60 mean 2) The focal ratio of your solar optical system at the camera sensor. Many thanks. Magnus 1) fs60 means takahashi fs-60 (60/355) telescope :) 2) with this optical system (fs60+BF1...
by stef41
Thu Apr 15, 2021 10:49 am
Forum: This is SolarChat !!
Topic: halpha solar animation on 14 April
Replies: 7
Views: 87

halpha solar animation on 14 April

Hello to all, a small animation of yesterday's prominences made with the fs60 with its sm40 double stack, BF10, barlow x2 lens, ADC and zwo178mm on GP between 14h18 and 15h21 UT big field rotation during the animation because my set up was totally messed up 44 films of 600 frames every minute autost...
by stef41
Wed Apr 14, 2021 5:46 pm
Forum: This is SolarChat !!
Topic: halpha sun on 14 April
Replies: 2
Views: 50

halpha sun on 14 April

good morning to all, a rather nice sun today with two nice prominences and an active area (and small filaments) at the fs60 with its sm40 double stack, BF10, glasspath x1.7 and zwo178mm at about 2pm UT S20210414-13h57UT-sm40DS-fs60-bf10-gpx1.7-asi178mm.jpg S20210414-13h59UT-sm40DS-fs60-bf10-gpx1.7-a...
by stef41
Mon Apr 12, 2021 4:41 pm
Forum: SPoD Archive
Topic: halpha sun on 12 April
Replies: 6
Views: 43

halpha sun on 12 April

good morning to all,

a nice hairy sun today, at the fs60 with its sm40 double stack, BF10, glasspath x1.7 and zwo178mm around 15h10 UT
S20210412-15h11UT-sm40DS-fs60-bf10-gpx1.7-asi178mm.jpg
S20210412-15h11UT-sm40DS-fs60-bf10-gpx1.7-asi178mm.jpg (1.48 MiB) Viewed 109 times
S20210412-15h12UT-sm40DS-fs60-bf10-gpx1.7-asi178mm.jpg
S20210412-15h12UT-sm40DS-fs60-bf10-gpx1.7-asi178mm.jpg (1.75 MiB) Viewed 109 times
Sincerely
stephane
by stef41
Mon Apr 12, 2021 4:41 pm
Forum: This is SolarChat !!
Topic: halpha sun on 12 April
Replies: 6
Views: 89

halpha sun on 12 April

good morning to all,

a nice hairy sun today, at the fs60 with its sm40 double stack, BF10, glasspath x1.7 and zwo178mm around 15h10 UT
S20210412-15h11UT-sm40DS-fs60-bf10-gpx1.7-asi178mm.jpg
S20210412-15h11UT-sm40DS-fs60-bf10-gpx1.7-asi178mm.jpg (1.48 MiB) Viewed 89 times
S20210412-15h12UT-sm40DS-fs60-bf10-gpx1.7-asi178mm.jpg
S20210412-15h12UT-sm40DS-fs60-bf10-gpx1.7-asi178mm.jpg (1.75 MiB) Viewed 89 times
Sincerely
stephane
by stef41
Thu Apr 08, 2021 5:38 pm
Forum: This is SolarChat !!
Topic: halpha sun on 8 April
Replies: 13
Views: 191

halpha sun on 8 April

good morning to all, a little late afternoon sun (in France) between two cirrus clouds with the fs60 equipped with its sm40 double stack, BF10, glasspath x1.7 and zwo178mm around 16h20 UT S20210408-16h20UT-sm40DS-fs60-bf10-gpx1.7-asi178mm.jpg S20210408-16h21UT-sm40DS-fs60-bf10-gpx1.7-asi178mm.jpg co...
by stef41
Thu Apr 08, 2021 7:28 am
Forum: This is SolarChat !!
Topic: Sunny 5th April 2021
Replies: 15
Views: 171

Re: Sunny 5th April 2021

Montana wrote: Tue Apr 06, 2021 5:32 pm
Stéphane, I am going through a pink phase at the moment :girl: https://sdo.gsfc.nasa.gov/assets/img/la ... 6_1700.jpg
ok... tastes and colors, that is not to be discussed ...... especially since I am color blind! :D

Sincerely,
stéphane
by stef41
Wed Apr 07, 2021 7:21 pm
Forum: This is SolarChat !!
Topic: halpha sun on 7 April
Replies: 6
Views: 106

halpha sun on 7 April

good evening to all,

a late afternoon sun (for me, in France ;) ), at the fs60 with its sm40 double stack, BF10, glasspath x1.7 and zwo178mm around 16:20 UT
S20210407-16h22UT-sm40DS-fs60-bf10-gpx1.7-asi178mm.jpg
S20210407-16h22UT-sm40DS-fs60-bf10-gpx1.7-asi178mm.jpg (1.45 MiB) Viewed 106 times
S20210407-16h23UT-sm40DS-fs60-bf10-gpx1.7-asi178mm.jpg
S20210407-16h23UT-sm40DS-fs60-bf10-gpx1.7-asi178mm.jpg (1.41 MiB) Viewed 106 times
cordially
stephane