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gorann

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About gorann

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    Sub Dwarf
  • Birthday 19/05/59

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  • Website URL
    http://www.mn.uio.no/ibv/english/people/aca/gorann/index.html

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  • Gender
    Male
  • Interests
    Astrophotography
  • Location
    Värmland, Sweden (59.77 °N)

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  1. Yes, the Liverpool Telescope people have been very enthusiastic about Wim's and my efforts in making nice images our of their data. They are much engaged in outreach to schools and will use our processed images to sell astronomy to kids and students, so when we took the privilege to work on our processing skills with data from a 2 m telescope, while the skies up here at 60°N were all to bright for collecting our own data, it turned out to be a very symbiotic relationship. What I really like is that they often turn their big scope towards rarely imaged galaxies so many of the images are in my humble opinion the best available of those particular objects.
  2. I use manual focusing on my refractors but for the SCTs I really need a motorized focus or the star is wobbling all over the screen when I try to focus due to the long FL and my clumsy hands, so for my Edge HD scopes I use a JMI focuser. It does not have a stepper motor but it is probably about half prize compared to those with stepper motors. So, if you are not aiming at using it for auto focusing (need a stepper motor for that I think) a JMI focuser is a cheaper option: http://www.jimsmobile.com/buy_motofocus.htm#chart1
  3. M27

    Should have read you post more carefully but it explains how you managed to capture so much detail. Congrats on a great M27!
  4. M27

    Hi Alan I expect that there is a lot of detail in your Ha data so you could try using the Ha also as a luminosity layer in Photoshop, probably not 100% (play with the opacity or fill slider)
  5. Just had to see what it would look like after swapping the green and blue channels (+ some selective colour tweak) in PS. At least it looks different.....
  6. Just wonderful - could be a record in detail for that aperture. I also like the colour version a lot. I would probably have tried to tweak the green towards blue, since OIII is blue.
  7. You are clearly already getting there. You did essentially what I did. One problem with your image is that you took it without the coma corrector and odd star shapes are difficult to correct (I did it partially by using a Photoshop plug-in filter called Focus Magic that can correct motion blur but it is not ideal for coma). Then shrinking them helps quite a bit.
  8. Since you live in the UK there is a good chance you can find courses possibly some arranged by SGL. I learned by books, reading up on the net, and then trial, error and practicing, and I still have a lot to learn.
  9. Aha, I missed the snapshot nature of the image. Then it is amazing what that CCD camera can grab in 10 s.
  10. Very very petty Olly, I am just slightly puzzled that I there are no faint fuzzies around in that nice starfield. Goes to show that the universe is not uniform.
  11. Not a bad start at all. Actually quite nice data and with some processing (in my case Photoshop but I am sure Wim would suggest Pixinsight) you can improve an image like yours a lot.
  12. I think it looks like you handle the Ha quite well - not sure what you are disappointed with. One reason it will be difficult to figure out where this nebula is, is that it is a mirror image which is how they come out of the LT. Maybe if you flip it and turn it 180 ° it will be recognizable. One minor thing that sticks out as a bit odd is a couple of almost green stars, at least on my screen.
  13. Well, the backside of the data from this 2 metre wide scope is that they usually take quite few subs, and often end up with less than 1 - 2 hours in total data. So I imagine that if you sell your house in an expensive city and buy one of the largest scopes available to us amateurs, something like a 24 " RC, and spend 24 h or more on an object, you could possibly produce images like this (provided you move to a very dark area). An advantage with our smaller backyard scopes lies in more wide field object and we have time on our side, so we can shoot night after night. It is too many astronomers wanting data from big scopes and imaging time is expensive, so only a few subs are taken of an object now and then. The images that Wim and I have been processing are from a mix of subs taken by numerous astronomers over 2 - 3 years. In other words we are picking up the leftovers and putting them together to make an image.
  14. Here is a new version where I tried to take away the last remains of those reflection artifacts around the brightest stars (a problem apparently inherent to the Liverpool Telescope), so they do not get confused with dust. I also darkened the core a bit to reveal more detail.
  15. That is a striking image but I expect that few galaxies are as dusty as NGC1313, and when processing I do so with a rather bright background (around 35) and always look for dust and do my best to bring it out before taking down the background to a comfortable level at the end.