Jump to content

Stargazers Lounge Uses Cookies

Like most websites, SGL uses cookies in order to deliver a secure, personalised service, to provide social media functions and to analyse our traffic. Continued use of SGL indicates your acceptance of our cookie policy.

  • Announcements

    sgl_imaging_challenge_banner_rgb.jpg.9467c4d39b22ba8239e1b5ad252fcee2.jpg

gorann

Advanced Members
  • Content count

    1,674
  • Joined

  • Last visited

Community Reputation

1,754 Excellent

2 Followers

About gorann

Contact Methods

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

Profile Information

  • Gender
    Male
  • Interests
    Astrophotography
  • Location
    Värmland, Sweden (59.77 °N)
  1. LDN1622 - The Bogeyman mosaic in mono

    Thanks Sara! I have now corrected the name on my Astrobin.
  2. Markarian's Chain

    Really nice start! I wonder if longer subs would be the right way to go since your stars are a bit blown out already (unless that happened in processing). More subs are probably better medicine (or a set of shorter subs to save the stars and galactic cores). What scope did you use? I notice that your stars are oval in the corners. If you used the ED80 with the Lightwave reducer (which I assume is also a flattener) it may not be at the right distance from your chip. Cheers
  3. LDN1622 - The Bogeyman mosaic in mono

    Very nice indeed Sara (as expected of course)! I look forward to see how this project develops. Graeme mentioned that the smudged Pre-main-sequence star looks larger in the DSS (POSS 2) plates. A year or so ago I entertained myself with processing POSS2 data (which is only red and blue plates so I mixed them 50:50 to make a synthetic green channel), and accidentally one of the objects was LDN1622 (I did not know it was called The Bogeyman nebula - or did you make that up?). Looking at it now it is clear that the Pre-main-sequence star is much smaller in your Ha image. I assume it cannot have shrunken that much since the 90-ties and that most of the light there is outside the Ha wavelength. Here is the link to the POSS2 image: https://www.astrobin.com/284586/ Cheers
  4. Messier 65

    Yes, a very beautiful image! How does the access to the LCOGT data work? Cheers
  5. NGC4565

    Amazing shot! I have been thinking about it for a while and now you just pushed me a bit closer towards pressing the buy button an an Esprit 150.....
  6. Rosette one year later

    This one:
  7. Rosette one year later

    Yes, very nice indeed - I really like the wide-screen framing. It reminds me of an image Olly @ollypenriceposted in January. When I look at it with that "neck" sticking out to the left it makes me think of a marine worm of the genus Glycera (but then I am a biologist.....). It is quite a nasty thing that can inflict painful bites - very much an alien type of creature.
  8. M101

    If you don not know how to do it now you will soon learn. You can either scale up the pixel/inch in your wide field or downscale your close ups, but they obviously have to be on the same scale before you start merging the data. No idea how to do it in PI (but I am sure others know). Quite easy in PS but it takes some fiddling since you also have to adjust the angle of the close ups to fit (i.e. rotate). But it is a problem for later after you got your wide field together.
  9. M101

    Nooo Rodd - without the reducer you would not have caught that little nebula to the right. Now, you are on your way to get a great wide field image where yo can fill in the details later with longer focal lenghts.
  10. M101

    Yes, you may be on to something spectacular and the second version is the best. Cheers
  11. California Nebula 300mm tele mosaic

    Thanks! Yes, it is so easy to lose track of some aspect of the image while working on another, and especially the sky and stars can easily suffer, so it is a great comfort to have saved previous versions at your rescue.
  12. This one has been posted and evolved in a thread in the Deep Sky Imaging forum, so you can read more about it there. Data from 21 Dec 2017
  13. California Nebula 300mm tele mosaic

    I also had another look and started to agree with you Rodd, so I have tuned down the blue/magenta saturation in the halos around the stars and blurred them a bit to make them look softer. Also stepped back a bit on the sky background that appeared a bit too dark and maybe even clipped (copied the background from an earlier version using the magic wand and pasted it in as a layer). Thanks!
  14. Rosette one year later

    Still a bit too bright centrally for me - I get the feeling that the brightness overwhelms all the nice detail you captured there. The data is clearly amazing. Just to explain what I mean I had a quick go at it with PS using just the contrast /brightness slider (a rather crude tool - can probably be done better with curves) selectively on the central parts (using layer masks and the brush tool) keeping the sky the same.
  15. Jupiter-Tesla conjuction

    Boys, no planets allowed here - this is the Deep Space Imaging forum - or is the Tessla already on its way out of the solar system?
×