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Found 9 results

  1. It was probably a long shot giving my planetary/guide cam a go at long exposure deep sky with narrowband, but had to give it s try at least... As i live in Norway it's only nautical dark these days, so i'm hoping for better results in the winter time. This is a stack of 15x 600s exposures with gain set at 12. No darks, bias or flats added (yet). Also no guiding. Quickly processed in PS. 2 versons where one have a bit aggressive noise and star reduction. Taken with the QHY5L-II-M cooled to about -5c, 7nm Ha filter, 50mm F/1.8@2.8 lens.
  2. This target was fainter then i thought and got a lot more noisy then i had hoped for - but at least in smaller prints it looks ok and i'm happy with it for now. I'll for sure come back and capture loads more data on this target at a later point. Taken with the Explorer 200 and unmodded 550D. 55 min total exposure at ISO3200 for 7nm Ha, 30 min total exposure at ISO1600 for 8.5nm OIII.
  3. Faced with another good sky but not much time, I started with two open clusters in Casseopeia. Following my first sighting of NGC 7789 (Caroline's Rose) in binoculars a couple of days ago, I turned the scope on it tonight. One of the prettiest clusters around, I would say. It appeared at its best in my 15mm eyepiece (42x) where a number of individual stars were resolved and the large hazy area seemed to be mottled as though other stars were at the point of further resolution. Very nice. I moved on to the less impressive NGC 433, which appeared as a small glow around a brighter star in a v-shaped asterism between Ruchbah and Gamma Casseopeiae. Still, another one chalked off. The best was saved until last. Thanks to a post from Cotterless45, I went for the Veil nebula rather than save it for a dark sky session some unimaginable time in the future. Wow! What a stunner! First of all, I sort of stumbled across it. Not hard, given the size of the thing. As I scrolled across the sky in the right area of Cygnus, a beautiful milky crescent moved through the 25mm eyepiece field of view. The UHC filter had done its job. The crescent was of course NGC 6992 (Caldwell 33, a.k.a. the Eastern Veil). It culminated in a denser patch of nebulosity, namely NGC 6995, (the Southern Veil), slightly wider and near a pair of 8th magnitude stars. The map indicated there was more of the Eastern Veil beyond this but it seemed to fizzle out at this point for me. I recommend anyone with half decent skies and a UHC filter go for this. It is superb, like a mini-Milky Way! __________________________________________________ ______ Observing Session: Tuesday 18th September 2012, 21:10 hrs to 22:10 hrs BST VLM at Zenith: 5.3 - 5.4 New - Revisited - Failed
  4. Here is an RGB image from the monochrome glass plate images (taken through a red and a blue filter) from the Palomar Observatory Sky Survey II (1990ties) downloaded from the Mikulski Archives site. They used the Oschin 48-inch (1.2-m) Schmidt camera on the Mt Palomar Obsy. Here I used both red and blue data and made a synthetic green (a 50:50 mix of red and blue) to make a RGB image. Much of the work in this case went into aligning stars since the red and blue did not match up perfectly over the whole image, so I had to divide it up into 6 squares where I aligned the colour channels. All done in PS. I think there is some very nice details in the data and tight stars, but I get the feeling that the dynamic range of these glass plates is not as high as in our modern 16bit digital images, so it is not possible to bring out as much dust as we are getting used to. Comments and suggestions most welcome.
  5. Hi guys After processing the Eastern & Wastern Veils separately a couple of months back, I've finally got round to doing the mosaic that was always the end goal (hence the framing of each panel). I'm not sure why I waited so long to do it, I think deep-down I was secretly dreading it really, as this is my first mosaic so I wasn't really sure how it would go. So this is just 2 panels, and each one has 5 hrs of Ha (15 x 1200s), with 3 hrs 20 mins of Oiii in one (10 x 1200s) and 3 hrs 40 mins of Oiii (11 x 1200s) in the other. So 17 hrs in total. APP was used for stacking, gradient reduction, and the mosaic creation. PS used for everything else. Ha assigned to Red, Oiii to Blue, and Green was synthesized from one of Carboni's actions. I've tried to push it as far as I dare to, did I over-do it do you think? I've resized it down to 66% to help hide some of the noise, and being a mosaic it's still plenty big. I might even end up bringing it down to 50%, we'll see. C&C welcome as always. I tend to finish my images very late at night, so I can sometimes fall into the trap of not seeing the image as clearly as I should! So feel free to be as harsh as you like ?
  6. The Eastern Veil Nebula ... and in red hues for my wife! Image Details Camera: QSI 683 WSG-8 Filters: Baader 7nm Ha and 8.5nm OIII Telescope: William Optics FLT 98 Mount: Mesu 200 Exposures: 12 x 900 sec Ha + 15 x 900 sec OIII Processing: MaxIm DL and PhotoShop CS3 General Description The Eastern Veil Nebula, sometimes known as the Network Nebula, is part of a large supernova remnant known as the Cygnus Loop (Sharpless 103). The star that produced the nebula is believed to have gone supernova between 5,000 and 8,000 years ago. Other major component regions of the Cygnus Loop include NGC 6960, the Western Veil (also known as the Witch's Broom Nebula) which is centred on the magnitude +4.22 star 52 Cygni and Pickering’s Triangle (Simeis 3-188) although there are numerous other smaller regions of nebulosity. The whole remnant spans approximately 3⁰ in diameter and is believed to lie at a distance of about 2,100 light years although some sources place it at a much closer 1,400 light years. Also known as Caldwell 33, the Eastern Veil Nebula comprises a cloud of heated and ionized gas and dust that responds very well to imaging in both Hydrogen Alpha (Ha) and triply ionised Oxygen (OIII) which is quite handy as bi-colour imaging is one of my favourite imaging modes! However, this wonderful object is also suitable for LRGB and one shot colour imaging. The Easter Veil Nebula comprises three major catalogued regions; NGC 6992 is the brightest at magnitude +7.0 followed by NGC 6995 and IC 1340. Discovery NGC 6992 and NGC 6995 were discovered by William Herschel on 5th September, 1784 using his newly produced 20 foot long reflector with its 18.7 inch aperture from his Old Windsor base. However, it was John Herschel who assigned the two designations in 1825. IC 1340 was discovered by Truman Safford on 13th September, 1866. Location As the name implies, the Eastern Veil is the most easterly region of the Veil Nebula. The core of the Veil Nebula lies 3.25⁰ due south of magnitude +2.48 Gienah Cygni at the right hand (southern) wing of Cygnus (The Swan). NGC 6992 RA: 20h56m 24.0s DE:+31°43'00" NGC 6995 RA: 20h57m06.0s DE:+31°13'00" IC 1340 RA: 20h56m 12.0s DE:+31°04'00" The Cygnus Loop Image Details Camera: QSI 683 WSG-8 Filters: Baader 7nm Ha and 8.5nm OIII Telescope: Vixen VSD 100 Mount: Mesu 200 Exposures: 8 x 600 sec Ha + 5 x 600 sec OIII Processing: MaxIm DL and PhotoShop CS3 One Shot Colour Version from years ago! Image Details Camera: Starlight Xpress SXVF-M25C Filters: Hutech IDAS LP Telescope: SW ED 80 Mount: EQ6 SkyScan Exposures: 14 x 400 sec Processing: MaxIm DL and PhotoShop 7
  7. How's going people? Long time since last post due to bright Swedish summer nights, gear-tuning and automation fiddling, but now I'm up & running again. I'm starting off the dark season with one of my favorite targets inside the cygnus loop, NGC 6992, east veil nebula. The subs where acquired during three moonlit nights, all subs unguided. (shooting other targets too, so subs are shot when the target is in the highest position in the sky, thanks to ACP automation) I've only used two filters for this image, Ha & O3 (both 5nm). I mixed the color close to Ha/O3/O3 as R/G/B , with slight different weights in G & B, to reach a more blue tone rather than cyan. Both Ha & O3 was used as luminance-data. I also created a "natural" star-color mix of the layers, with Ha / Ha+O3 / O3 as R/G/B and adjusted filterweights until I had a natural mix of yellow & blue (go Sweden!) stars, which was later applied as color-data with a star-mask on top of the image. The Subs (unguided): Ha : 19 x 600s / 190 minutes O3 : 12 x 600s / 120 minutes Total time: 310 minutes / 5.2 hours The Scope: Orion Optics AG12 Aperture: 12" Focal lenght: 1140mm Focal ratio: f/3.8 Imaging scale: 0.98" / pixel together with my QSI 583 The Mount: 10 Micron GM 2000 HPS All subs unguided The Camera: QSI 583 wsg (with 8-position filterwheel upgrade) Filters: Astrodon Click image for full resolution: It's been so much fun to see this object in the high resolution my setup produces, so many faint formations of nebulosity I've never seen before. I also recommend to have a peek at the following link, it's crazy how different the same object can look, imaged through different wavelengths: Click here to see the difference between the Ha & O3 at my homepage, with a "mouse-over" function that switches between the two Thanks a lot for watching Best Regards Jonas Grinde http://www.grinderphoto.se
  8. I've been exploring the Veil nebula with my telescope with an OIII filter in place and really enjoying my observing time. More recently I've been doing some imaging in the Cygnus region and while the camera clicks away I've been doing some observing with my binoculars. While on a sailing trip last week with my wife and my in-laws we had a very clear night on Loch Sween when I really appreciated taking my binoculars with me. The sky was very dark and M31 was easily seen with naked eyes and M33 was also very clearly visible in the bins. I then had a look for the East and West parts of the Veil nebula and thought that I could just about see traces of the Eastern section. The West side wasn't obvious though it's more clearly marked by 52Cyg and I had to concede that I couldn't see it with my bins. I was out imaging the Eastern limb of the Veil nebula last night, from my back garden, and I used by bins to look in the same region. Sure enough, there was a faint curved glow in just the right place in the backdrop of faint stars. I thought that it would be a real struggle with my 10 x 50s, especially as the Western limb is pretty much invisible in the telescope without the OIII filter, but I was really astonished at how unmissable it was. I'm still a little surprised that the Western limb, The Witches Broom, wasn't visible with the binoculars as it doesn't seem to be that much fainter than the Eastern limb through the telescope. Does anyone else find it to be like this? Incidentally, observing from a boat with a good set of binoculars is a real treat. On the West coast of Scotland there are some very nice anchorages with completely dark skies. Fantastic. You can even do some bird watching during the day.
  9. Aenima

    eastern veil

    From the album: The next step.

    Part of the massive Cygnus loop the Eastern Veil Nebula, approx 25 x 40 - 60 seconds, unguided . 200p EQ5 300D. DSS

    © Aenima

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