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MartinB

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Everything posted by MartinB

  1. I seem to remember flatSNRestimator came up with a gaussian noise of 3.15 and I don't recall dividing by 16 but I'm 100% certain now! The offset has been removed by calibration so it isn't the offset you have applied for the data capture. It should be zero. Yes, use the variance scale as shown. You can adjust the cycle spin count to suit, the higher the number the better the accuracy and the longer the process. 8 seems to be a good default I think the key is to get a result that looks good. I have zoomed in a long way to check faint details aren't being blurred. It might not be quite the PI way but I guess you can tweak the gain / noise values.
  2. Yes... I think so. I used in on a Veil Complex image and it seemed to work nicely. I'm now working on data from Simeis 147 and the same settings shown above ie gain 0.056 and gaussian noise 3.15. These figures were derived from the flatSNRestimator. I think the issue is as described by Wim above re working with 12 bit data.
  3. Especially planetary observing. After a while your eye/brain starts to do a sort of registax rejection of the blurred images and locks on to how the planet appears during the moments of better seeing. It takes me at least 10 minutes before this really stars to be fully effective.
  4. Power useage of the mount is very low. Due heaters take more power especially the larger ones. My 10amp hour power pack runs out of steam after a few hours running just two very small dew heaters. If you are planning long sessions a 17Amp hour is a good option.
  5. Fabulous image of a very messy target! The dust is very nicely rendered.
  6. Ah brilliant! I can see the little blighter. Thanks for posting Reggie, that was a very interesting read. If you are planning a plantary approach I wonder if an IR pass filter might help settle the seeing issues a little.
  7. The first instance sounds weird, I've never had that problem in 13 years. Occassionally Maxim struggles with images that are inverted after a meridian flip, but it reports the issue and rejects them in the alignment. I thn rotate the inverted files using the batch process tool. As far as I am aware, my version of Maxim doesn't model distortions and registar is much better for combining images from different imaging equipment as have found. You can create a distortion model with PI. I don't know whether you can with APP but I bet you can!
  8. Interesting that you had problems with Maxim. I have found it to be extremely accurate registering images from the same scope. Registstar is great for mosaics and images taken with different optics.
  9. The colour is really nice and the main body of the nebula shows the detail very nicely with good contrast. The background is rather dark and some of the fainter outer nebulosity appears to have been attenuated.
  10. Excellent colour and some good detail especially in the core. These galaxies are a big challenge with UL LP. I agree that the outer regions look a little smoothed out. A bit of noise is understandable!
  11. Thats a very nice Witche's Broom and you have some of the fainter wisps
  12. Yes you have a nice bit of dust and a well controlled core. Very nice M42
  13. Despite your guiding problems it has come out very nicely. To my eye the background has a slight green bias which is easily fixed. The guiding issue may well have been due to a hot pixel or another star in the guide frame. The software can intermittently take a liking to the rogue bright point and severely mess things up.
  14. That is right up there with the best Stuart. Superbly processed, the dust is spectacular
  15. The nebula is looking great. The starfield has that business you get with widefield images. Have you tried the Starnet PI script?
  16. The mono shows it at it's best I think. This target is nearly all Ha. Some RGB stars would complement the Ha perfectly
  17. Keep plugging away, it is going be well worth it.
  18. Terrific, I love all those dust lanes. The CGEM has done a good job taming the focal length.
  19. That is a very dramatic M33 with shed loads of detail. Good use of aperture!
  20. Some lovely detail in those galaxy arms and good to see the Ha star burst in the cigar.
  21. Oh yes, that's looking good Carole, definitely worth persevering
  22. MartinB

    NGC 6823

    Whatever, it works!!
  23. That looks great exactly as it is Mick. Of course there is no "correct" stretch!
  24. That is a serious amount of dust Bob, well done for hoovering that up.
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