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tommy_h
super member


Reged: 12/27/11

Loc: Zellerndorf/Austria
Re: Anyone tried Theli for stacking on Linux? new [Re: avarakin]
      #5106029 - 03/05/12 07:45 AM

Hi Alex

I'm not an expert in Theli, but with my pictures it works very well. I think, a narrow band image is not really good for a first try, normal rgb images would be better.

A pixelscale calculator: http://www.cmoos.de/astro/theli/getpixelscale/pixelscale.php?focallength=750&auswahl=4.7&pixelsize=

My settings in Astro/Photometry:

catalog: USNO Mag-limit: 15

Absolute Photometry (direct) and (indirect): unchecked

create source cat: checked and default settings

Astro+photometry: checked,
settings:
posangle maxerror: 180
position maxerror: 10-20
match flipped images: checked

other settings: default !!!

I hope it helps

Thomas




Edited by tommy_h (03/05/12 08:18 AM)


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Mischa
journeyman


Reged: 09/04/08

Loc: CHILE
Re: Anyone tried Theli for stacking on Linux? new [Re: avarakin]
      #5106717 - 03/05/12 02:41 PM

Alex,

it does not make much sense to stack different narrow-band filters into one coadded FITS image. You should coadd different filters separately.

Concerning (4): THELI uses full parallelisation only for multi-chip cameras. All amateur cameras are single-chip cameras. For single-chip cameras parallelisation is used during the astrometric solution, sky subtraction and coaddition.

As for (5): You do NOT want to run any of the absolute photometric calibration. Differences in atmospheric transparency (i.e. relative photometric calibration) etc are automatically done when doing the astrometry.

The other hints posted by tommy_h sound very reasonable to me. Have a look at the plots/fgroups_1.png check-plot. This should look reasonable (same orientation for exposures, many green dots inside). Examples can be found here:

http://www.astro.uni-bonn.de/~theli/gui/astromphotom.html#interpreting-scamp-check-plots

mischa


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avarakin
Carpal Tunnel
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Reged: 07/13/09

Loc: Parsippany NJ, USA
Re: Anyone tried Theli for stacking on Linux? new [Re: tommy_h]
      #5107586 - 03/05/12 11:57 PM Attachment (30 downloads)

Mischa, Thomas,
Thanks for your help!
I followed your suggestions but I am still not getting past the errors while doing astro+photometry.
My plot looks like this now:
-frames are nicely aligned
-inside the frames I have mostly green crosses, about 300
-I also have some red squares inside and outside, about 10
-there are few, maybe 20 green squares inside frames

What does this plot mean?

Another question is: what do green squares and crosses mean?


Alex

Edited by avarakin (03/06/12 12:07 AM)


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Mischa
journeyman


Reged: 09/04/08

Loc: CHILE
Re: Anyone tried Theli for stacking on Linux? new [Re: avarakin]
      #5107997 - 03/06/12 09:19 AM

Alex:

green crosses: an object detected in the image and used for astrometry
green diamond: an object detected, matched with an object in the reference catalog
red square: a reference source, not matched by any detections in the images.

your plot looks fine to me, but it appears that you could choose a deeper catalog, or increase the magnitude limit by 2 magnitudes.

how do you know that "it didn't work"? looks fine to me!

mischa


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frasax
sage


Reged: 12/27/07

Loc: Cologne,Germany
Re: Anyone tried Theli for stacking on Linux? new [Re: Mischa]
      #5664042 - 02/05/13 05:40 PM

I hook up on this older posting.

Im going to do a presentation about a standard workflow in Theli at CEDIC in Linz/Austria at the beginning of March. I really will try hard to do a full presentation in english for my Youtube Channel as well. So stay tuned.

CS Frank


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lambermo
professor emeritus


Reged: 07/16/07

Loc: .nl
Re: Anyone tried Theli for stacking on Linux? new [Re: frasax]
      #5664050 - 02/05/13 05:44 PM Attachment (5 downloads)

Quote:

Im going to do a presentation about a standard workflow in Theli at CEDIC in Linz/Austria at the beginning of March. I really will try hard to do a full presentation in english for my Youtube Channel as well. So stay tuned. CS Frank




cool ! Theli needs that. Will it explain workflow for both a dslr and ccd user ? and what to do in case of errors ? Like when this happens ->


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frasax
sage


Reged: 12/27/07

Loc: Cologne,Germany
Re: Anyone tried Theli for stacking on Linux? [Re: lambermo]
      #5664174 - 02/05/13 07:03 PM

Hi,

well those workflows are not that much different, it doesnt really matter if youre using a CCD or DSLR.

In your case the astrometry went wrong, of course i will explain this.

Youre from the Netherlands? So maybe you speak a little german maybe? If so you could try my german video tutorials. www.youtube.com/astrophotocologne

CS Frank


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FrankenCub
super member


Reged: 08/26/11

Loc: Whitney Point, NY
Re: Anyone tried Theli for stacking on Linux? new [Re: frasax]
      #5669471 - 02/08/13 05:28 PM

For anyone still following this and possible having dual monitor support issues with Ubuntu 11.10 and higher, I resolved those issues with Nvidia drivers. They weren't compatible for some reason and had to go back to older drivers until recently Nvidia brought out the latest, which I am now using. I upgraded to 12.04 and all went to @*#&, there's a LOT of hardware compatibility issues and bug reports which oddly won't be resolved
I am now on Linux Mint 13 Cinnamon with not a single issue and so much less headache not having Unity. And being based on Ubuntu, everything I've installed from Ubuntu has went really smooth.

I've been looking for some good software to use, my camera should be here next week, along with the snow clouds. I will give Theli a try too, I can't afford to spend much more money to get software right now lol.


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AdirondackAstro
sage
*****

Reged: 06/06/11

Loc: Plattsburgh, NY
Re: Anyone tried Theli for stacking on Linux? new [Re: FrankenCub]
      #5670736 - 02/09/13 01:17 PM

Not quite sure how to even install Theli. Running Ubuntu 12.04 currently. I got DSS to install under WINE using winetricks. Haven't stacked anything yet to test it out though.

Really interested in possibly giving Theli a try, looks interesting and worth a shot.


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frasax
sage


Reged: 12/27/07

Loc: Cologne,Germany
Re: Anyone tried Theli for stacking on Linux? new [Re: AdirondackAstro]
      #5676322 - 02/12/13 05:20 PM

Hello,

ive helped a new user during his first steps over the last couple of days, and i found out that Theli works most stable under Ubuntu 10.04 for some reasons i dont know yet. For now i would suggest to everyone to install it under Ubuntu 10.04 Lycid Lynx. (For just trying it out you can install it as a virtual Machine on MacOS or Windows).

Be a bit more patient, im right now working on english Video Tutorials. They are published after my Workshop ill do at the Central European Deepsky Imaging Conference on 1st of March.

So stay tuned:-)

CS Frank


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daev
Technically Enlightened
*****

Reged: 03/10/04

Loc: On the edge of the desert
Re: Anyone tried Theli for stacking on Linux? new [Re: frasax]
      #5687825 - 02/18/13 09:11 PM

Thank you!

dave


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daev
Technically Enlightened
*****

Reged: 03/10/04

Loc: On the edge of the desert
Re: Anyone tried Theli for stacking on Linux? new [Re: FrankenCub]
      #5687826 - 02/18/13 09:12 PM

Quote:

For anyone still following this and possible having dual monitor support issues with Ubuntu 11.10 and higher, I resolved those issues with Nvidia drivers. They weren't compatible for some reason and had to go back to older drivers until recently Nvidia brought out the latest, which I am now using. I upgraded to 12.04 and all went to @*#&, there's a LOT of hardware compatibility issues and bug reports which oddly won't be resolved
I am now on Linux Mint 13 Cinnamon with not a single issue and so much less headache not having Unity. And being based on Ubuntu, everything I've installed from Ubuntu has went really smooth.

I've been looking for some good software to use, my camera should be here next week, along with the snow clouds. I will give Theli a try too, I can't afford to spend much more money to get software right now lol.




This piques my interest. I've been tempted to switch distros for a while now.


dave


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avarakin
Carpal Tunnel
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Reged: 07/13/09

Loc: Parsippany NJ, USA
Re: Anyone tried Theli for stacking on Linux? new [Re: daev]
      #5687844 - 02/18/13 09:25 PM

I tried Mint some time ago but the returned back to Unbuntu. I have 2 Ubuntu 12.04 computers and they work just fine.
If you dont like Unity, just run Xfce.

Going back to Theli: I did try it but had too many problems with plate solving. Too bad Theli does not allow to stack just arbitrary images as DSS and other stacking software allows.
So I am back to DSS.


Alex


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daev
Technically Enlightened
*****

Reged: 03/10/04

Loc: On the edge of the desert
Re: Anyone tried Theli for stacking on Linux? new [Re: avarakin]
      #5687877 - 02/18/13 09:43 PM

Quote:

If you dont like Unity, just run Xfce.
Alex




I don't, and I'm running Gnome3 Which is fine except for some glitchiness in Compiz.

dave


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frasax
sage


Reged: 12/27/07

Loc: Cologne,Germany
Re: Anyone tried Theli for stacking on Linux? new [Re: daev]
      #5691395 - 02/20/13 05:38 PM

Hi Alex,

Quote:

I did try it but had too many problems with plate solving




So could you explain a bit more detailed about your problems ? The Plate solving is a step which is more or less a bit tricky here and there. But it is so powerful that getting trough this progress is worth it!

CS Frank


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frasax
sage


Reged: 12/27/07

Loc: Cologne,Germany
Re: Anyone tried Theli for stacking on Linux? new [Re: frasax]
      #5711083 - 03/03/13 05:41 PM

Hi everyone,

my Theli Tutorials are now online on Youtube:

Astronomical Image Data Reduction with Theli Part I
http://www.youtube.com/watch?v=ISaHkW0GBgg

Astronomical Image Data Reduction with Theli Part II
http://www.youtube.com/watch?v=1BEnNSqPJh0

Astronomical Image Data Reduction with Theli Part III
http://www.youtube.com/watch?v=ih400HqRaYQ

How to install Linux and Theli on your Computer
http://www.astrophotocologne.de/astroph ... lation.pdf

Some more Infos in the CCD or DSLR Section of the Forum.

CS Frank


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