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Laurin Dave

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Everything posted by Laurin Dave

  1. Started back in late April and finished off early last week, the Tulip Nebula in Cygnus, accompanied by what is believed to be the shock wave from micro-quasar Cygnus X-1 in HaLum_HaR_OiiiG_OiiiB and SHO palettes. 10 hrs each Ha, Oiii and Sii and 3hrs each RGB, RGB and Ha captured with Esprit150/SX46 and Sii and Oiii captured with Esprit100/ASI1600mm. Processed in Pixinsight and Photoshop, Ha and Oiii added using blend mode lighten and Ha used as a light lum layer again using Photoshop. Thanks for looking Dave
  2. If I remember correctly back focus should be 44mm for a Canon fit 46.5 mm for a Nikon fit plus 1/3rd of any filter thickness you have between the lens and the sensor
  3. Did you use “fast” or “high quality” as the option in Mosaic by Coordinates? If the former then try the later.. and do it overnight as it’ll take a while also do the Ha, Oiii and Sii for each individual panel align correctly? If not then I suggest you register the subs using thin plate splines and distortion correction ..
  4. Looks like amp glow to me ... see this from ZWO What is Amp-glow and how do I manage it? | ZWO ASI (astronomy-imaging-camera.com)
  5. Here's my second go.. this time with enhanced IFN. I did this using a masked curve. The mask for the IFN was created using Pixinsight's MLTransform (which isolated the large IFN structures) and Starnet (which removed the star residuals), the galaxies were protected using masks generated with PI's GAME script (which allows you to draw ovals). Dave
  6. Here's my first go...... processed in Pixinsight and Photoshop. Background extraction and neutralisation, Photometric colour calibration, HSVrepair, ArcSinh and Histogram stretches on RGB, Deconvolution and Histogram stretch on Lum, Histogram stretch on Ha - all in PI, LAB col and Soft light saturation increase in PS, Ha added to Red using Blend mode lighten in PS, Luminance layered on in 5 iterations in PS, Local Histogram equalisation in PI then LHE and non LHE images combined in PS to enhance (although not by very much) the IFN, MLT sharpening in Pi and a slight curve lift in PS ...... and a lot of toing and froing Dave edited 18Aug - improved detail on Holmberg
  7. Very nice Alan.. I agree, the NSG script is great, as you say it makes gradient removal easier and also helps brings out faint details..
  8. He was busy on Instagram earlier today showing off his polishing skills ..
  9. Very nice Steve, lovely detail into the core
  10. Lovely images, particularly like the Trifid.. which must be very low Dave
  11. I run a SX Ultrastar and DeepSkyDad autofocuser through the hub on my ASI2600mc with no issues... from there to the desktop pc though an active USB3 HTH Dave
  12. I used this Current Local Time in London, England, United Kingdom (timeanddate.com)
  13. Hi Steve I used it once to grab this ISS crossing the Sun today at 10:28 - Observing - Solar - Stargazers Lounge As far as I could tell it was bang on time local time (ie BST as it was April), but just in case set the camera going 30s before.. Dave
  14. Have you measured the different stacks in Subframe Selector? It looks to me as if the longer integration time stacks are getting harder stretches, maybe put the same stretch on each stack and then compare, also what's happening to M81 and M82 are they gettng better?
  15. That’s a great image Adam, lovely detail in M82’s dust lanes.. well done!
  16. ISS crossing the sun (just) today at 10:28 from Swallowfield Berkshire... Lunt 60, ASI174 Thanks for looking Dave
  17. The Coma Cluster through Esprit150SX46 for 6hrs Lum and Esprit100ASI1600 for 2 hrs each RGB captured on 14,15 and 16 April.... Quite a few here, PixInsight says 89 NGC/IC and 529 PGC galaxies.. The core inverted and superstretched showing supergiant ellipticals NGC4874 and NGC4889 and some of their enormous 1 million lyr diameter halos The Coma Cluster (Abell 1656) is a large cluster of galaxies that contains over 1,000 identified galaxies. The cluster's mean distance from Earth is 321 million light years. The central region is dominated by two supergiant elliptical galaxies: NGC 4874 and NGC 4889. The cluster is within a few degrees of the north galactic pole on the sky. Most of the galaxies that inhabit the central portion of the Coma Cluster are ellipticals. Both dwarf and giant ellipticals are found in abundance in the Coma Cluster. NGC 4874 is a supergiant elliptical galaxy. Discovered by William Herschel in 1785. The second-brightest galaxy within the northern Coma Cluster, it is located at a distance of 350 million light-years from Earth. The galaxy is surrounded by an immense stellar halo that extends up to one million light-years in diameter. It is also enveloped by a huge cloud of interstellar medium that is currently being heated by action of infalling material from its central supermassive black hole. A jet of highly energetic plasma extends out to 1,700 light-years from its center. The galaxy has 18 700 ± 2260 globular clusters. NGC 4889 is an E4 supergiant elliptical galaxy. It was discovered in 1785 by William Herschel. The brightest galaxy within the northern Coma Cluster, it is located at a median distance of 308 million light year from Earth. At the core of the galaxy is a supermassive black hole that heats the intracluster medium through the action of friction from infalling gases and dust. As the largest and the most massive galaxy easily visible to Earth, NGC 4889 has played an important role in both amateur and professional astronomy, and has become a prototype in studying the dynamical evolution of other supergiant elliptical galaxies in the more distant universe. NGC 4921 is a barred spiral galaxy in the Coma Cluster, located in the constellation Coma Berenices. It is about 320 million light-years from Earth. The galaxy has a nucleus with a bar structure that is surrounded by a distinct ring of dust that contains recently formed, hot blue stars. The outer part consists of unusually smooth, poorly distinguished spiral arms. NGC 4911 is a disturbed, warped spiral galaxy with a bright prominent central starburst NGC 4911 is believed to be interacting with its warped, barred lenticular companion (or any of its many other nearby companions), producing the enhanced star formation and shell-like appearance seen in optical images. The galaxy contains rich lanes of dust and gas near its centre. The existence of clouds of Hydrogen within the galaxy indicates ongoing star formation. This is rare for a spiral galaxy to be situated at the heart of a cluster. source Wiki thanks for looking Dave
  18. Here's another one through an Esprit150 with an SX46 from a couple of years ago... on the left lightly stretched 9x1200s lum and on the right an even more lightly stretched single sub at 800%.. like others I was surprised to see it.. Good luck with 3C-273 Steve! Dave
  19. Is that with an OAG Dave? I sometimes get light leaking down gap around the stalk... insulation tape fixes it..
  20. Indeed I did Wim... it was a journey to the Dark Side... maybe that's where you saw Chewbacca....
  21. Very nice Wim.. definitely a great ape.. no tail !
  22. I haven’t used it .. only found out recently when after 27 months of ownership I decided it was time I read the manual... and yes a useful tool.. I have my Dad’s AVO, older than me still going strong and immensely useful
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