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gorann

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Everything posted by gorann

  1. gorann
    I am back from the south Pacific to a wet and damp winter in Sweden. However, it did clear up on Sunday night and I aimed at the Northern Trifid Nebula. Since the moon was virtually full, my plan was to collect Ha with the Esprit 150 and ASI1600 mono. Since my Esprit 100 was sitting next to it, I though what the heck, I put my ASI071 on it and collect some RGB that I could maybe use for star colour later. I got about 7 hours with each scope, but the Ha data was quite uninteresting. Not much structure there and seeing was apparently not the best - probably ice crystals in the sky, so guiding suffered too (ca 1.3" RMS). To my surprise, the RGB data looked much more interesting. Maybe it was because of running many short exposures (140 x 3 min) in an effort to not be totally blinded by the moon. Not sure that this is supported by theory (what do @vlaiv say?) but it may have been the reason why the data looked usable. So here it is, RGB from an OSC under a nearly full moon. Obviously, a really dark night with great guiding would have brought out more details, but..... Comments most welcome!
  2. gorann
    You lost me. I have never run anything on my Mac from a terminal window. How does that work?
  3. gorann
    Well, I have a good excuse since Starnet only works for PI in Windows, and I have a Mac. Rather irritating becasue it would be fun to test it.
  4. gorann
    Regarding gain and offset for the ASI1600, I always use unity gain = 139, and offset 50. The main reason being that is seems to be a very common setting among ASI1600 users and it has worked fine for me. My exposure times depend on the brightness and filter. For lum 3 - 5 min, and for NB 10 - 15 min. The reason I do not normally use shorter exposure times is that I rather not stack many hundreds of subs. However, recently at Lizard Island I only had an un-guided Star Adventurer mount so I used 90 s exposures (with an ASI071 color CMOS) to reduce star trailing and then I had to deal with 100 - 200 subs to stack. I think I brough home about 100 Gb of data.
  5. gorann
    Then there is also the Edge HD9.25 for which Celestron now also produce a reducer at a quite reasonable price.
  6. gorann
    Great image and good start of the new year! Just wondered: is not the whole idea with the FSQ106 that it has an enormous image circle. By putting an ASI1600 you only use a fraction of those 6000 dollars of real estate. I assume Rodd and you are very tempted by the new ASI 6200 MM Pro Mono......
  7. gorann
    Yes I nearly overfilled my portable hard dive and had to erase some of the files created during calibration and stacking in PI. Physiology (including my own) may have suffered a bit during the mornings after clear nights, but the fortunately Sjannie could keep it going😉 so we have some good physiology data too.
  8. gorann
    Hi Peter, sorry, but probably not. I see that he works in aquaculture, which is a bit on the side of what I mostly work on. I am an animal physiologist with focus on environmental adaptations, often in aquatic animals like fish but primarily on basic science and I only rarely touch on applied aspects like aquaculture or fisheries. I arrived back home today with a fat jetlag after 30 hours on planes and airports🙄
  9. gorann
    Great thread Wim! You need to add to it when you finally get fit for finnishing off the build. I suspect that you, like I have now done, at a later time will fully insulate the obsy so that you cheaply can keep the equpiment dry at a few degrees above ambient temperature. You have already insulated the roof and floor, so it will be a small investment to do it to the walls. Then I am of course very pleased that my Hole Observatory design was adopted. At least it works quite well for those of us that are fortunate enough to have some space for the build and not a cramped backyard. And yes, a priority must be to get your revenge on that rock and make a safe path to the obsy! PS. My Lizard Island AP adventure is over for this time and we are sitting in a hotel room in Cairns waiting for the flight home. I hear from my neighbor in Sweden that I have no snow to worry about - just wet muddy grounds and roads. Then I just need to bring the clear skies
  10. gorann
    Hi Peter do you mean the Society for Experimental Biology meeting in Prague? I usually go to those but probably not this year - too many other meetings this summer. Are you a biologist too?
  11. gorann
    Last night was cloudy so the Bogeyman Nebula became the final AP image from this trip to paradise. I instead post an image showing how we celebrate X-mas on Lizard Island Research Station - we take traditions very seriously!
  12. gorann
    Thanks a lot Peter! Yes I bought one of those double rings for fine focusing from TS. They work but as you say are very clumpsy, so I left them at home. Please use my idea - has worked perfectly here with no out of focus subs at all. It both provides fine adjustment and fixes the focusing ring. Your Canon lens must be very similar to mine so maybe you can also use one of the screws on that label-plate. Otherwise it may work with just rubberbands in both ends of the rod. PS. And yes we got some results on temperture tolerance in jumping snails too
  13. gorann
    Managed to bag the Bogeyman Nebula (LN1622) last night. It is up by Orion and the red nebulosity to the right is part of Barnard's loop. I fired away at it all night but had to throw away quite a bit due to clouds, but ended up with 185 x 90s, so about 4.6 hours. Had to do a flip at 0100 and reframe - a bit of a fiddle with a mount without any computer control. Never imaged this one before even if it may be possible from back home, but then it will defenitively not be straight up in the sky. I had decided that this should be the last one here, but now it looks like I may get one more clear night before I leave......
  14. gorann
    Thanks Peter! I have not seen any fog here. The rainy season is supposed to have started, but fortunately it is a bit late this year. I think that I have had 9 clear nights during the 16 days I have been here now, so really quite good, and I devoted 7 of those to AP and 2 of them to X-mas and New Year celebrations. Tonight looks relatively promising so there could still be one more image to bag but then clouds and rain are forcasted for the last few days here🙄. On Saturday it is time to head back to northern Europe for the galaxy season
  15. gorann
    Thank you all! Last night was perfectly clear but it was New Years Eve so I had to give AP a miss 🙄and instead just enjoy the sky together with my wife and the small crowd of people here at the station right now🥂. We bruned up a whole buch of expired emergency flares at midnight - quite spectacular🎇.
  16. gorann
    The last two nights I managed to catch panels to the south (including the Statue of Liberty nebula) and north of Eta Carina in order to make a three panel mosaic. Not the easiest endevour with a Star Adventurer mount. So no fancy platesolving software helping me out. Also PI refused to put them together, saying it could not find matching stars, so I had to do it manually in PI. Here is a preliminary version just to show you that I am still alive and kicking down here. It is downsized to about 1/3 of the original but I am sure it will still take half-an-hour to upload. Now I will make a little astroimage show to show before midnight on a screen on the beach, where I and the other inhabitatnts of the station will wait for the new year to come. Happy New year to you all! Göran
  17. gorann
    Thanks! You seem to know the area well. The answer is probably not, but I could have another look tonight when we will celebrate New Year on the beach and I will have a clear southern horizon to look at. Cape Flattery is not straight south but more SSW and I see those mines every time we fly up here. They are clearly expanding year from year but probably not using that much light, and it would be very low on the horizon. Where I have my rig there are a few bushes at the SSW horizon. A bit of light pollution comes from the lighthouse on Palfrey Island about a km away from where I put up my litte rig, but it is not a constant light - just occasional flashes.
  18. gorann
    I have not had any new data for a few days here due to clouds (and X-mas party and Saturday BBQ), but luck may be changing tonight. It is 0130 here and I am shooting off at a panel south of the Eta Carina nebula that includes the Statue of Liberty Nebula, so a small mosaic project again. Right now it is largely clear skies but the weather report talks about rain so this may be a late night sleepless night for me. I have built a small rain shield for the setup but I do not trust it fully since rain often comes with a bit of wind here and my construction may just blow away, so I probably just need to stay awake until it lightens up again around 0500.....🥴
  19. gorann
    I should check my filters with a spectrophotometer, we have a few of them where I work. Just have to remember to do it.
  20. gorann
    I have both a 7 nm and 3.5 nm Baader Ha fillter and I have the impression that the 3.5 nm is quite a bit sharper but I have not tested them side by side or the same night. So it could be that the difference between Baader 3.5 nm and Astrodon 3 nm is rather small and not worth the big price difference.
  21. gorann
    I just spent a bit more time on processing my accidental snap shot from early on Christmas Eve. My first processing was mainly to see what I had been aiming at, and I promise that the inclusion of the Christmas Tree Cluster was pure coincidence. Another noatble thing in there is the Dreyer's Nebula in the upper left corner. The major area of red nebulosity or the stiking yellow star cluster are not given any designated names or numbers by platesolving in Astrobin, which I find a bit odd. So here it is agan, not too bad for 38 x 90s = 57minutes of exposure😉
  22. gorann
    Yes Don, it is lovely here indeed, and I hope for some more clear nights before I leave next Saturday😪
  23. gorann
    Thanks a lot Michael!
  24. gorann
    Thanks a lot Wim! And with a OSC camera..... Apparently that is all you need under a perfectly dark sky. The telephoto lens does not shine when it comes to the shapes of particularly smaller stars, and the smallest stars are also often affected by a bit star trailing as expected from 90 s unguided. I try to fix it as much as possible in processing, but pixel peepers would have some issues with them. It is probably not easy to see in the images I post here since I need to downsize them to 1/3 of the original resolution, so from about 4900 x 3300 pixels to 3000 x 2000 pixels, to have a chance to upload them. It still takes 15 - 30 min for an image to upload. The internet here is connected to the mainland with an antenna, not even a dish.
  25. gorann
    Thanks a lot Olly, you are too nice!
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