Prominence and active regions on Sunday 29 July

[Paul Haese]

I wanted to do a full disk today as I have been sort out etalon settings in an effort to get the sort of detail that Peter Ward gets. I have think I have found the right setting but only got a chance to image for 30 seconds before clouds killed my ideas. Now cloudy as I look out the window and raining. Oh well the weather gods must be appeased.

This image is the sort of detail I am looking to acheive. It is a little noisey but shows the prominence as it was fading. I am really looking forward to getting the lunt 80.

[Shiraz]

very fine detail there Paul . nice view of the prominence. regards Ray

[gbeal]

I'm learning like most out there, this is a single shot Paul, so the disk and prom in the one shot, correct?
I find I have to do two, one of the disk, one of the prom, and then stack them.
Gary

[Poita]

Nice detail, looks like some double-image though?

I was watching that prom today inbetween the clouds.

Anything special with the etalon settings? I just dismantled my etalon and rebuilt it last night to hopefully get a better result, it looks better in the eyepiece, but cloud has put any imaging aside for today.

[Paul Haese]

thanks guys,

Gary, yes you can do that. For bright proms there is no need but for faint ones you can do a brighter one and take another lot of avis just for the proms then mask them in later. This image is not an example of that. Hopefully tomorrow the sky will clear.

[Paul Haese]

Peter most likely this is because I used all the frames. Only 224 frames before I had to stop it. I like 700 frames to stack normally and the seeing was not great.

[Poita]

The detail really is impressive, with good seeing and a good stack it should result in some very nice images.

[sheeny]

Lovely fine detail where the detail is definite, Paul, but looks a bit like wavelet artifacts or something like it where the detail is not so definite (away from the ARs). Looks almost like a cross hatching overlay rotated about 10° clockwise from square.:shrug:

You normally don't have that in your images. Any one else see it?

Al.

[Peter Ward]

Sorry Paul, to my eye your data has a number of ghosts or double images.

Needs a few more frames to cut down the noise as well.

(I'm processing my July 29 data as we speak, but the structure is well defined... i.e. not doubled up)

That prom is also quite massive!..but maybe you were off band a tad?

Cheers
Peter

[Paul Haese]

Have a little read through thread chaps. ;) It was a test really to get the band pass like Peter. The prom was not very bright Peter. You being so used to your aperture, but for a 60mm you need to do a separate run.

Anyway it was not meant to be one of my best images, just 30 seconds of data. No where near enough frames and no doubt the doubling is caused from using all the frames. Tomorrow maybe:)

[Peter Ward]

Looked big and bright to the 90...:) (as you can see in my post of the same) Cheers.

[Paul Haese]

Peter, I think once I get the 80 I will notice a significant difference in terms of resolution and how bright the proms appear. Based on Ted's images I am wishing it would hurry up and arrive.

I just did another run with this fragile data and only used 150 frames but the image is not much better. Hopefully tomorrow will bring better conditions. I want to develop my solar imaging a bit more yet.

[strongmanmike]

Hmmm, annoying isn't it :whistle: ;)

Shows promise for sure, bad luck the weather turned :doh:

Mike

[Peter Ward]

Que? In 30 seconds some cameras can get over 1000 frames...hence I for one wasnt sure of the reason for the thin data.

It's also quite a trick to nail an Etalon's tuning without also causing an uneven looking flux across the full solar hemisphere..... In any event all good fun when trying to perfect various techniques :)

[Derek Klepp]

Some Sun is better than none. I'm guessing you may be waiting a while I've been waiting a few months now for a CaK module.

[Paul Haese]

Yeah I take your point. We all do it sometimes. Myself included. :)






Ah hence I see why you are wondering. My DMK41 only gets 15 frames per second at best. At ROI though this changes but I have been using the size of the frame to the max. The Lumenera 2-2 you have, what is the maximum frame rate? With the DMK having thin data is only conquered by doing Avi's of 77seconds to get me over the 1155 frames. Now do you see how hard it is for me to get the mosaics I get. Diameter and speed makes it asier for you.


While I agree with your assessment. My normal etalon adjustment produces rather fine detail but not much of the big and chunky looking field lines as in your image and this image. The seeing was wobbly and not enough time to build enough frames to narrow out the bad frames. Personally I thought given the small amount of frames I had obtain this was not a bad effort. However that will change soon.


Dereck, I am not getting a CaK module. I am getting an 80 Ha Lunt single stack. I have seen some outstanding image taken with a single stack of this model that has significantly more detail and I don't need to buy the double stack. I have consulted with some of the top solar guys on the planet and they are mainly all using single stack aperture now. Couple of years ago I could have sworn you needed a double stack, but apparently not now. Proof will be in the pudding though.

[nandopg]

Paul,
I like the image, good contrast and details. It is a bit grainy because, as you said, the seeing was bad and there is nothing one can do to fix this.
Paul, if you are going to buy another solar rig, regard a Daystar filter instead of a scope based on mechanical pressure.
I think that mechanical pressure applied manually to do a so sensitive adjustment like the center frequency of the etalon is just awful.

Best Regards,

Fernando

[Paul Haese]

Too late Fernando, I take delivery next week of a 80mm Lunt. I had considered a day star several times over the years but the f ratio is what put me off. My aim is to do mosaics like I am now but of a higher calibre. This makes the Day Star a little problematic. However still a great filter set though.