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stephane zoll

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About stephane zoll

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  1. Thank you all ! Yes, and the Moon too !!! Cheers,
  2. Rory, => Jacoby 1, in Bootes. Very faint... Thanks,
  3. oups, pb with the link: http://www.astrobin.com/users/stephane_zoll/
  4. Hi, I took the time to make this mosaic of my collection of large planetary nebulas at this stage. Two or three more planned for this winter... You can have a look to them individually at the dedicated page: http://www.astrobin....ll/��(don't hesitate to rate them to give me some feedback: some images are already 2 years old and I should probably try a new version since I started to learn to use PixInsight...) Thanks for looking,
  5. Hi, This subject occupied a large part of my astronomy nights this summer. G 65.3+5.7 ("the little Cygnus Veils"), is a faint SNR localized in Cygnus. Many diffuse and filamentary structures compose this remnant ; SH2-91, SH2-94 and SH2-96 are some of the brightest parts. The whole structure covers a field of more than 3°, which is very similar to the size of the popular Cygnus Veils. However G65.3+5.7 is much fainter, to a larger distance of about 2500 LYs as compared with 1500 LYs for the Veils, and much older (~ 30000 years vs 7500 years). G65.3+5.7 shows a significant signal both in Halpha and OIII ; stronger in Halpha especially in the area of SH2-91 & SH2-94, but the OIII signal allows to better estimate the whole structure and limits of the SNR, while the Halpha signal tends to merge with the surrounding galactic nebulosities. Below, an OIII map of the whole SNR: 2&3: SH2-91 4: SH2-94 5: SH2-96 1+7+6: no name, "North East area" Therefore along the summer I imaged SH2-94+96 and the North-East area. The SH2-91 photograph was taken 2 years ago and complete the series. SH2-91: SH2-94+96: North-East zone: All the details at the page: http://www.astrosurf...G65_3__5_7.html Best photons, Stephane
  6. Hi Olly, I was in this area in July, around the 20th. No biking, but hiking... No real pollution from Briançon where I was, west side of the Col. Briancon is hidden by significant mountains and is not such a big city. The only pollution comes from the cars passing all the night on the road ! Thanks Paul ! Stephane
  7. Thank you for your replies ! The quality of the sky there helps really a lot. Keep in mind that all the signal for the depth of the image comes only from the luminance shots, i.e. 2h only here. Cheers, Stephane
  8. Very nice set of images. On VdB141, you may reduce the color noise further. Sincerely, Stephane
  9. Thank you for your replies. The OIII structure has been discovered just a year ago. Studies have been done this summer at La Palma ; conclusions soon. It looks like a kind of PN but the star reponsible for this structure may be a little exotic... Stephane
  10. Here is a photograph of Outters4 (OU4), a giant nebula hidden in Sharpless 129, recently discovered by Nicolas Outters (http://www.outters.f...erte-OU4-eu.pdf). OU4 is mostly emitting in the OIII line and is very large (1.2° wide) but very faint compared to the Ha signal of Sharpless 129. The nature of this nebula is not yet clarified and subject to observation from professional astronomers these days [Publication: http://www.outters.f...1206.2477v1.pdf ]. Common name : Giant Squid nebula, credit to Nicolas ! Acquisition: FSQ106 refractor at f/3.6 , camera Atik 4000, 4h20 Ha, 7h20 OIII and 2h50 RGB. A full resolution image can be found here : http://www.astrosurf...LMAR_HOORGB.jpg Other large planetary nebulas here : http://www.astrosurf.../images_PN.html Thanks for looking, Stephane
  11. Hello, Here is a 2.2° wide field around the Iris nebula. This field includes vdB141 and some other dust clouds almost everywhere. This photograph has been acquired in the french Alps, near the Col du Lautaret (famous for the Tour de France ), at 2000m elevation, which allowed me to get a deep image. => Taka. FSQ106 f/d=3.6 => Astrodon LRGB filters => CCD Atik 4000 (-20°C). => L: 15 min subs - total 2h. => RGB: 5 min subs (bin1) ; total 60min for each color. Treatment with PixInsight. All the best, stephane
  12. Symesie, my Atik is the "M" one. Much more efficient for narrow band imaging. My tracking system in this configuration is : - FDSQ106 as guiding scope - Philips webcam - Guidemaster soft - Orion Atlas mount Image: Thanks John, Zul, Andy !
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