Search found 2873 matches

by Valery
Thu Aug 16, 2018 8:05 am
Forum: This is SolarChat !!
Topic: Filament and active region on Aug 15
Replies: 5
Views: 39

Re: Filament and active region on Aug 15

Nice images, Lou!

Were they done with a 4" instrument or with a something larger?


Valery
by Valery
Tue Aug 14, 2018 2:09 pm
Forum: This is SolarChat !!
Topic: Sunset Moonset on Walters Mountain + Venting Satellite
Replies: 13
Views: 95

Re: Sunset Moonset on Walters Mountain + Venting Satellite

Fantastic series of images, Derek!

The earth's sattelite image is something special.

I always enjoy your pictures of our sun, sky and mather nature.

Thanks for sharing and, as always, looking for more!
by Valery
Mon Aug 13, 2018 4:11 pm
Forum: This is SolarChat !!
Topic: Ha Quantum filter PE 0.4Å
Replies: 33
Views: 291

Re: Ha Quantum filter PE 0.4Å

It only drifts off on the HaT, after several hours Valery, and that has only been this summer when ambient temperatures have been 25c+ outside whilst imaging. It is too much drift if outside of H-a ! I have never experienced even +/-0,1A drift from the position I have choosed for a given tuning. Qu...
by Valery
Mon Aug 13, 2018 3:58 pm
Forum: This is SolarChat !!
Topic: Ha Quantum filter PE 0.4Å
Replies: 33
Views: 291

Re: Ha Quantum filter PE 0.4Å

Rainer, According to Mark Wagner, who produce Solar Spectrum etalons (very much like DayStar does) the only correct ERF filter for such etalons is at least a red filter. The less unwanted heat from the sun will reach an etalon, the better etalon keeps it's position at a choosed wave length. Valery
by Valery
Mon Aug 13, 2018 3:54 pm
Forum: This is SolarChat !!
Topic: Ha Quantum filter PE 0.4Å
Replies: 33
Views: 291

Re: Ha Quantum filter PE 0.4Å

About temperature that is the next problem. I saw yesterday that in my area it is taking long time to cool down or nearly it does not cool down. I think I will have to add some fans to cool it down. Yesterday the Quantum remained for a very long time at 6563.0Å and the light was yellow. I had it ad...
by Valery
Sun Aug 12, 2018 6:25 pm
Forum: This is SolarChat !!
Topic: Ha Quantum filter PE 0.4Å
Replies: 33
Views: 291

Re: Ha Quantum filter PE 0.4Å

It is difficult for me to understand the usefulness of a yellow ERF. Close to nothing, I believe. A red ERF with IR cut coating is what is really need for H-a imaging.
by Valery
Sat Aug 11, 2018 5:54 pm
Forum: This is SolarChat !!
Topic: CaK from August 7th with ARIES-ERF
Replies: 12
Views: 205

Re: CaK from August 7th with ARIES-ERF

Hello Frank,

I am unable to read the attached file in the PM you sent me.

Please, send it to my e-mail.


Vakery
by Valery
Fri Aug 10, 2018 2:23 pm
Forum: This is SolarChat !!
Topic: CaK from August 7th with ARIES-ERF
Replies: 12
Views: 205

Re: CaK from August 7th with ARIES-ERF

Thanks, Eric and Mark! Eric, I can see why the picture looks underprocessed to you (and to Valery, too),while in fact I did quite a lot of processing: It looks slightly blurred, but I could not improve that by much. My second version: Regards, Frank Here is your last image re-processed. 1. The filt...
by Valery
Fri Aug 10, 2018 1:59 pm
Forum: This is SolarChat !!
Topic: CaK from August 7th with ARIES-ERF
Replies: 12
Views: 205

Re: CaK from August 7th with ARIES-ERF

Hi Frank,

BTW. Your last image looks like my unprocessed images.

You can put the image in the PhotoShop and cut the best ROI and make it smaller in PGR format but still 16 bit.
This will be OK for processing. Yes, send me the best frame via e-mail.

Valery
by Valery
Fri Aug 10, 2018 1:52 pm
Forum: This is SolarChat !!
Topic: Sun in Ha and CaK 8th Aug
Replies: 9
Views: 167

Re: Sun in Ha and CaK 8th Aug

I like your images, Stu. But always waiting for the images taken with your big solar gun - a 10" RC.


Valery
by Valery
Fri Aug 10, 2018 1:50 pm
Forum: This is SolarChat !!
Topic: Sun 8th August
Replies: 11
Views: 144

Re: Sun 8th August

Mark, What the etalon has been used for HiRes image? Quark or a PST etalon? And I agree with Alexandra and Franko, that you still have a good details at the HiRes image. My August 8 session was remarkably successful. Too bad I became so lazy to process all the movies and then prepare best shots for ...
by Valery
Thu Aug 09, 2018 5:02 pm
Forum: This is SolarChat !!
Topic: 280mm Ca II K at full resolution. AR2661 June 7 2017
Replies: 11
Views: 664

Re: 280mm Ca II K at full resolution. AR2661 June 7 2017

My apologies to all. These images indeed were overprocessed. What I didn't understand is why different algorithms behave similarly in the noising results.

Now my images look much less noisy and very much similar to what professionals obtaining with DOT telescope at Canary Islands.


Valery
by Valery
Wed Aug 08, 2018 8:06 pm
Forum: This is SolarChat !!
Topic: CaK from August 7th with ARIES-ERF
Replies: 12
Views: 205

Re: CaK from August 7th with ARIES-ERF

Hi Frank, Good result for the very beginning. Looks underprocessed. Many depends of what was the seeing and how many frames have you stacked. You can send me some unprocessed stacked images and I will take care of them and see how much deeper you can go with processing to extract more and finer deta...
by Valery
Wed Aug 08, 2018 3:41 am
Forum: Solar Astronomy Shop and Swap
Topic: wanted: Lunt B1800 or BF30
Replies: 2
Views: 174

Re: wanted: Lunt B1800 or BF30

antonf wrote:
Sun Aug 05, 2018 5:28 am
wanted: Lunt B1800 (straight is prefered).
Will also consider Coronado BF30 offers.
Got a Lunt B1200 straight model. Like new condition. Used a few times. B1200 is more than enough for a 120 - 150mm scope.


Valery
by Valery
Wed Aug 08, 2018 2:00 am
Forum: This is SolarChat !!
Topic: First try at Sodium and one H-alpha
Replies: 16
Views: 291

Re: First try at Sodium and one H-alpha

Welcome back, Franko! Nice images.
by Valery
Tue Aug 07, 2018 2:31 pm
Forum: This is SolarChat !!
Topic: A new solar cycle #25?
Replies: 10
Views: 390

Re: A new solar cycle #25?

pedro wrote:
Mon Aug 06, 2018 8:48 pm
I was able to detect the high latitude AR

Image
Congratulates, Pedro! Lets hope this will be Mark's and your's sun cycle 25 begin.


Valery
by Valery
Tue Aug 07, 2018 2:28 pm
Forum: This is SolarChat !!
Topic: August 5th - Part 2
Replies: 6
Views: 100

Re: August 5th - Part 2

Nice session, Brian!

Hope you will have many clear sunny days with a good seeing like this one.


Valery
by Valery
Tue Aug 07, 2018 2:24 pm
Forum: This is SolarChat !!
Topic: Ha Full Disk 6th August
Replies: 5
Views: 103

Re: Ha Full Disk 6th August

This nicely done FD is the most active FD since about a month. If Alexandra is right and this is not the minimum yet, this is a bad news. We will need to wait long with very low activity sun. I'd prefer that Mark's guess is correct and that we already saw the very beginning of the new cycle #25. Val...
by Valery
Mon Aug 06, 2018 3:43 am
Forum: This is SolarChat !!
Topic: Ca K images of August 4
Replies: 8
Views: 118

Re: Ca K images of August 4

Beautifully performed images, Christian!

I too, always looking for your images. I especially impressed how contrast your Barr CaK filter - a chromosphere spiculae lyer is easily seen at the limb.
by Valery
Mon Aug 06, 2018 3:37 am
Forum: This is SolarChat !!
Topic: New AR12717 August 01 2018 C8 telescope with 214mm DERF
Replies: 9
Views: 212

Re: New AR12717 August 01 2018 C8 telescope with 214mm DERF

Thanks, Christian, Stu and Peter!


Peter, I don't know how much were the detuning in these cases, but my guess is +0,5 to +0,7A red and -0,6 to -0,7A blue.


Valery
by Valery
Sun Aug 05, 2018 9:03 am
Forum: This is SolarChat !!
Topic: A new solar cycle #25?
Replies: 10
Views: 390

Re: A new solar cycle #25?

Derek, this is because of insufficient your main solar scope telescope caliber. With my C11 I always (!) see some activity worth to look at. The only I need is better seeing because as smaller the subject the better seeing it requires to show us all it's detail. Mark, thanks a lot for this useful in...
by Valery
Sat Aug 04, 2018 3:50 pm
Forum: This is SolarChat !!
Topic: A new solar cycle #25?
Replies: 10
Views: 390

A new solar cycle #25?

Mark T. writes: "In other news, and from this mornings AIA1700 image, a little ephemeral region up around 50N may indicate the first signs of solar cycle 25". Do you think, Mark, this is really a sign of a new solar cycle and we can hope for slow solar activity rising??? Only last year there were a ...
by Valery
Sat Aug 04, 2018 3:45 pm
Forum: This is SolarChat !!
Topic: New AR12717 August 01 2018 C8 telescope with 214mm DERF
Replies: 9
Views: 212

Re: New AR12717 August 01 2018 C8 telescope with 214mm DERF

MapleRidge wrote:
Sat Aug 04, 2018 12:22 am
Very impressive Valery...especially the granulation lurking in the background of the red wing image :bow

Brian
Thanks, Brian

When I imaging in H-a I really hate all these lurking photospheric cells network. :)
by Valery
Sat Aug 04, 2018 3:26 pm
Forum: This is SolarChat !!
Topic: AR12717 With The HaT - 4th August
Replies: 9
Views: 136

Re: AR12717 With The HaT - 4th August

marktownley wrote:
Sat Aug 04, 2018 12:34 pm
Thanks Franco. Try using the flat field feature in Firecapture it works very well at balancing out uneven fields...
Yes, but this will not correct the real contrast of details, especially if an images has been taken with some shift from the best overall position.


Valery
by Valery
Sat Aug 04, 2018 3:24 pm
Forum: This is SolarChat !!
Topic: AR12717 With The HaT - 4th August
Replies: 9
Views: 136

Re: AR12717 With The HaT - 4th August

ffellah wrote:
Sat Aug 04, 2018 12:19 pm
my one seems to have some brighter and darker areas, I may have to talk to Daystar about it.

Franco
To talk to DayStar about this is a time waste. They will advice you to order a PE grade device for $$$$.


Valery