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pietervdv

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Everything posted by pietervdv

  1. This is a very nice and original capture, well done! But I think your background is a bit too bright. Maybe you can adjust the crop of the image lower left? Bright stars that are chopped in half due to the framing are distracting. Pieter
  2. Although I am sure the data is of very high quality, I have some serious doubts regarding this processing. I feel the processing has gone way too far. Way too much noise reduction and a "water painting" overall look. This is a PI image taken too far, perhaps you could try a less aggressive version? I hope you don't mind me saying this, but this is the way I see it. Just giving my opinion. Regards, Pieter
  3. Thanks for sharing, that is indeed very good. That's about 2.8 arcsec/pixel if I'm not mistaken? The NP series from TeleVue should get more recognition, they are incredibly good instruments. (right on par with Takahashi / TEC / AP) I am starting to feel sorry for selling mine... The only slight downside is the collimation system of the front lens assembly, this should be made more robust to my opinion. TeleVue do recommend their LCL-1069 "large field corrector" for use with fullframe sensors with the np101is and np127is: http://www.televue.com/engine/TV3b_page.asp?id=37&Tab=_table#LCL-1069 Maybe not so critical with your large 9 micron pixels? Regards, Pieter
  4. Great shot! I assume this is taken with the Moravian 16Meg camera? Would it be possible to post a 100% crop of the central area (with the bok globules)? I have used a np101is in the past and am curious to see the definition / resolution of this telescope - ccd combo. Are you using a flattner to fully cover the chip? Great scope btw... Thanks, Pieter
  5. Hello everyone, I'd like to share my latest image: a 2 panel mosaic of sh2-199 aka the Soul Nebula. Total exposure was 16 hours in 20 min subexposures over 3 nights last 2 weeks. Telescope: 10" f/3.8 Newton astrograph CCD: sbig st8300 cooled to -25°C giving a resolution of 1.17 arcsec/pixel Mount: Mesu 200 SiTech Capture (incl. platesolving, autofocus and meridean flip) was fully automated using SGP. Processing: levels & curves + contrast boost in PS (no more than 15min) Higher res versions can be found here: Small: http://www.astronomie.be/pieter.vandevelde/post/soul%20nebula%20v2_small.jpg Medium: http://www.astronomie.be/pieter.vandevelde/post/soul%20nebula%20v2_med.jpg When looking at the 100% size, some very interesting features start to show up. Possibly proplyds (protoplanetary structures), or an early stage of them? Thanks for looking. Regards, Pieter
  6. This is a very interesting question! For me the thrill has always been the chase, that is for sure. The main appeal in imaging for me, is the technical aspect and tinkering with equipment. I have spent up to 3 years tweaking and modifying to get my current imaging gear working the way I want to. Now this has been done, I recently started making another imaging instrument. Although it is very rewarding to see good data coming in, the image processing part is the most unappealing part of the hobby for me. The contact with the nightsky is so much more important to me, than spending +10 hrs behind a pc screen trying to wring the neck out of some imaging data. Processing is also very subjective (what some really like, may look overpushed to others) and maybe too artistic for a "technical nerd" like me I guess? The great thing about astrophotography is, it is a fusion of so many interesting things! So pick your preference I guess... Pieter
  7. Congratulations on your apod! A nice jewel on your crown! [emoji4] Pieter
  8. Very good indeed! Has your signature touch, would have known it was yours. Are you using the detilter yet? Regards, Pieter
  9. Nice. You have some weird shaped flares around the bright stars. A non symmetrical obstruction in front of the corrector plate? Camera shape, thick cables... ?
  10. Very impressive! Very subtle mix of both narrowband channels. 278h? Regards, Pieter
  11. Very Nice! What is the resulting focal length of your system?
  12. Very Nice! What donorscope did you use with your PST mod? I especially like the warm colours in these images!
  13. Indeed a great part of the nightsky, nice shot. The nebulae are LDN772 & LDN 778. Regards, Pieter
  14. Interesting... I assume you are referring to this object? I checked some catalogues and found this paper: http://astrogea.org/ibvs/ibvs5009/ibvs5009.htm It says it was previously mistaken as a planetary nebula (We 1-12) but observations from 1998 show it to be an isolated H-II region around an eclipsing binary star? To quote it: "V807 Cas was discovered as a variable star by the Hipparcos mission (ESA, 1997). It was classified as a periodic variable with a 0d.97463 period, a mean V magnitude of 10m.79, and an average B-V=0m.340 without specifying variability type. V807 Cas is in the center of PK110-0.1, which was initially classified as the planetary nebula We 1-12. Recent spectroscopic data by Kimeswenger (1998) indicate that V807 Cas has a B1V spectral type, and that We 1-12 is not a planetary nebula but an isolated H II region, as was also suggested by earlier works (e.g. Zijlstra et al. 1990; Kaler and Feibelman 1985). Kimeswenger also claims that V807 Cas is the only source of excitation of the H II cloud." Regards, Pieter
  15. Greetings all, I'd like to share my latest h-alpha image. Sh2-157 in Cassiopeia with the bright nebula LBN537 embedded inside it. It's a 2 pane mosaic, the data was captured over 4 nights the last 3 weeks. The data capturing (autofocusing, mosaicing, platesolving, mount flip) was fully automated with SGP. The last night was also the first outing with the newly supported Platesolve 2 routine in SGP. The latest version of SGP supports this PlaneWave platesoving feature. After struggling with slow / faulty Astrometry.net platesolves one night, I find Platesolve 2 lighting fast and a joy to use! Some further technical details: CCD: sbig st8300 using a 5nm astrodon h-alpha narrowband filter Exposure: 20h 40min in total (2 panel mosaic), 20 minute subframes Scope: 10" f/3.8 Newtonian astrograph Mount: Mesu200 Sitech Larger sizes: Med size: http://www.astronomie.be/pieter.vandevelde/deepsky/Sh2_157_20h40min_small.jpg Large size: http://www.astronomie.be/pieter.vandevelde/deepsky/Sh2_157_20h40min_med.jpg Thanks for taking the time to look, Regards, Pieter
  16. Very well done! You captured some very fine details. Pieter
  17. Thanks, the official designation of the object is LBN331 or DWB171, and there are a few images around of it already, so disregard my earlier statement it was the first detailed image of it. Thanks to Maurice Toet for the detective work and ruining my day[emoji6] ! Pieter
  18. Thanks! I checked some online catalogues but could not find any evidence of it being a SN remnant. Seems it's a faint hydrogen ripple originating from the ic1318 complex. Pieter
  19. Hello everyone, Here is a result from my latest 2 week imaging trip to Southern France beginning of August. The first week the moon was still preventing me from doing any broadband work, so the first week was spent on this h-alpha object. I found this object cruising around in the Digitized Sky Survey photographic plates. This object looked very faint so it seemed like an original & challenging project! It is a filamentary patch of nebulosity around Omi02 Cyg in the constellation of Cygnus. I rotated the ccd and made this 2 panel composition to include the brightest portion of it. Although it is extremely faint and could use some more exposure time, I am quite satisfied with what I managed to capture. Cygnus is filled with gems that are rarely imaged, many seem to forget there is so much more in Cygnus besides the NA and Pelican nebula... Technical details: CCD: sbig st8300 using a 5nm astrodon h-alpha narrowband filter Exposure: 22 hours in total (2 panel mosaic), 30 minute subframes Scope: 10" f/3.8 Newtonian astrograph Mount: Mesu200 Sitech The processing was kept very minimal: the calibrated stacks were stretched and stitched in Photoshop, no PI tricks used. I believe this is the first detailed amateur image of this area (could not find any at least), hope you like it! Be sure to check out the larger versions in below links. Small size: http://www.astronomie.be/pieter.vandevelde/deepsky/Omi02Cyg_nebula_small.jpg Med size: http://www.astronomie.be/pieter.vandevelde/deepsky/Omi02Cyg_nebula_med.jpg And a small pic of my setup during the 2 week stay: Thanks for checking it out! Regards, Pieter
  20. Well that didn't take long! It looks great, as to be expected of course... Could you not have had a lightleak from the led on your USB hub? I remember looking at it and wondering if it could shine in the drawtube. Of course it slipped my mind to mention it afterwards, sorry[emoji6] . But you managed to make it work in any case! Regards, Pieter
  21. Very nice widefield, you caught all the small filaments too! May I suggest you tweak the black point a bit, the background seems a bit too bright on my monitor. The KAF8300 is a great chip, but only if it is cooled sufficiently (otherwise it gets very noisy). What max delta T can you get? Do you have dual stage peltier cooling in your camera? Best regards, Pieter
  22. That looks really great! Refreshing to see a Hubble pallet pic that is not overpushed. I agree there is no substitute for long datasets. But you are at a pretty good spot for that! Pieter
  23. Sure about this? The Astrodons should give much smaller stars than the 7nm Baader. If not, you must be doing it wrong hehe...
  24. Thanks everyone for taking the time to look and comment! Pieter
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