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Found 18 results

  1. Hello, this is my first attempt on NGC 7635 with my skywatcher 250pds on an NEQ6 synscan mount. These are 7min subs stacked to a total exposure of 5 hours taken with my unmodified canon 700d and a skytech cls filter. No coma corrector was used as I haven't gotten one yet. I'm just wondering how I could make my images look clearer when zoomed in and improve them overall as I can see the image gets more blurry when I zoom in onto the bubble, should I use a higher magnification? Do I need to take more darks to get rid of the redness around the image ? Or perhaps I stretched the image too much in Photoshop? I used 10 darks, 60 bias and 60 flat frames. Update: I have now further processed my image with greater care and got a much better result. Thanks Greg
  2. alexbb

    Bubble

    The bubble nebula. Not much to add about the target itself as it is already popular enough. A combination of HOO shot with the ASI1600MMC + Astronomik narrowband filters through the 200mm newtonian tube removed from the dobson base and put on the EQ6-R. About 6h of exposure through the Oxygen filter and about 9h through the Hydrogen filter. Clicking on the pictures will redirect to the astrobin images where you can watch them in full resolution. Crop close-up And widefield Thanks for watching and clear skies to you too! Alex
  3. Hi! First light with my QHY8L and first contact with CCD camera :-) It was a right choice and good upgrade from Nikon D7200. 13x600s - Light at -20C 25x600s - Dark at -20C 35xBias 35xFLAT Tomek
  4. Well, I can't remember the last time I actually posted an image. Not this year & I don't remember anything of last year either! Whilst I've been collecting data over that period, I realise I get more of a kick out of the whole techy side of putting the bits together, automating it all & capturing the data. When it comes to processing I never seem to have the time & patience & just end up frustrating myself overcooking things when I do. I thought it about time to have another go & soon realised anything I actually had once known was long forgotten. So, I've been reading through Warren Keller's Inside PixInsight & thought I'd practice on some 12.5 hrs of data on NGC7635 collected over the 5th - 10th of this month. As I'm about to post this I can already see quite a few things need sorting out in the next version & I think I need to go back & start again but hey ho, I'll post it anyway otherwise it'll be next year before I know it! I've also got 14.5 hrs of SII & over 15 hrs of OIII plus a couple of hours or so each of RGB for the stars. I've thrown more away! So you can imagine, I've no idea when I'll get around to the full image! Tips & critique welcome as usual please... Scope: RC8 with AP 0.67 reducer Camera: Atik 314L+ Filter: Astrodon 5nm Ha Subs: 50 x 900 Processed in PixInsight
  5. OK... its not a full calibration because i've yet to collect flats... But i've subtracted Darks and Bias frames. It makes a difference to noise levels in the image doen't it... See previous post for further information.
  6. This is a wide field image from my Canon 300mm telephoto lens from about a week ago. Never got the chance to collect the corresponding RGB data before it disappeared behind my obsy wall, so since I am a sucker for colour I took the liberty to colourize it. After all it is mainly Ha in this object, but as soon as I get RGB data I will post the proper version but I am afraid that it will not happen this season as it is getting low on the horizon. Unmodded Canon 60D with Astronomik 12nm Ha clip filter. ISO1600. 15 x 10 min. Comments & suggestions most welcome, including angry ones that argue that Ha images should be in B/W Cheers Göran
  7. I recently saw some amazing images processed by Paddy Gilliand from LT data, and got inspired. The Liverpool Telescope, or "LT", is a fully robotic astronomical telescope owned and operated by the Astrophysics Research Institute of Liverpool John Moores University. It is fortunately not placed in England but on the summit of the island of La Palma, in the Canaries. It is there for professional astronomers to use but the data becomes freely available after a year. While the data is free for download it is a slightly cumbersome process since suitable subs have to selected from thumbnails and downloaded one at a time, and then quality sorted and aligned, which is not always straightforward as they may come from various astronomers working at different times. In any case, it is not an overwhelming task and well worth the effort. Another slight problem is to figure out what filters to go for by looking at the spectra for the filters most commonly used on the scope. I ended up using Sloan-r for red, Bessell-B or blue and Bessell-V for green and hoped that these would be approximately ok. I also downloaded Ha 656.6 nm data for luminosity and for a bit of Ha blending into the red channel. Paddy has made an amazing version of the Bubble using LT data but with a custom palette, so more like a NB image. So, I have tried to do something different (trying to compete with Paddy would obviously be futile) and I have gone for a more traditional HaRGB image. On problem with the data is that the chip appears to be full of dust and / or hot pixels (I assume that this has to do with it being remotely operated and not carefully cleaned very often), but I found that it could rather easily be fixed with the dust and scratches filter in PS (there were just so much of it that doing it with clone-stamping would have taken eons). It is altogether 41 subs (120 s each) of which 14 are Ha. Totally ca 1.4 hours - not much but then this is a 2 meter telescope, so aperture is on your side. All from the IO:O camera and stacked in Nebulosity 4 and processed in PS CS5 Here is the site for anyone that would like to have a go: http://telescope.livjm.ac.uk/cgi-bin/lt_search Any comments and suggestions most welcome of course!
  8. I´ve not posted for a while but everything appears to be working AND it was clear last week (I must have sold my soul without knowing) So I imaged a few of my favourites: NGC7635, bubble neb, is HA 20x600s NGC6888, crescent, is HA 18x600s Soon be winter and time to batten down the hatches ;-D
  9. From the album: Messier and NGC Objects

    7 x 600second Ha 10 x 600second OIII 10 x 600second darks Skywatcher 130pds, HEQ5 QHY Img2pro 6nm Ha Astronomik Clip filter 12nm OIII Astronomik Clip filter

    © A.Woodward, 2016

  10. From the album: Deep Sky III

    Quite a short integration time for me (4.3 hours) basically because the LRGB image is largely made up of test shots of my new unguided imaging set up. I still haven't quite perfected the art of magneta star elimination such that the results looks good - I think I shall have do a bit more research on the topic. The image was processed in PS with the exception of Pixinsight which was used for DBE, Colour Calibration, SCNR Green and Multiscale Linear Transform, I was particularly impressed with the latter function as a method of extracting a little more detail from the bubble region. LIGHTS: L:8; R:6:G:5:B:7 x 600s. DARKS:20, BIAS:100, FLATS:40 - all at -20C.
  11. Just a quick report on tonight's observation . Got an AZ GOTO mount on Monday and have the 130p mounted on it ... to be honest , I was worried about getting it set up right , but after a look around SGL found the information on coordinates that were needed and it works 100% . 3 new Messier and NGC targets were found tonight , well , 4 if you add NGC7000 , but it was too faint to count as a catch - it looked like a very faint cluster . The big catches tonight were in the Ursa Major region : Bode's Galaxy M81 and the Cigar Galaxy M82 . Both were well defined and bright , even in the 5 inch reflector and I was very happy to see them for the first time . Up to now M57 was my favourite DSO , now it's joint favourite with Bode's Galaxy . NGC7635 Bubble Nebula was also a first and added to the list tonight . Several other targets , e.g. Pinwheel Galaxy , in Ursa Major region were attempted tonight but with no luck - maybe darker Winter skies will give better results with these .
  12. Bubble imaged this morning between 2am and 6am. 2h25m integration. 12nm Astronomik Ha filter 127mm Ascension Atik 428Ex No calibration..
  13. At the moment it feels like I am juggling too many balls. I have quite a few images waiting in the wings as it were to be processed, but no time to do them justice, but still they come, as at the present moment M109 is rolling off the camera. So I thought I'd post a couple of previews of stuff in the pipeline. All at long focal length and perhaps a bit different to a standard offering. None of these images have been calibrated, just taken the lights and stacked them, and with M76 combined the Ha and O3 data to see how it looked. Just basic processing. All images taken with C11EdgeHD and Atik 428ex, with 7nm Baader Ha filter. Binned 2x2 usually. Thanks for looking, let me know what you think Tim
  14. I decided to go for an LRGB rendition of the Bubble nebula since the red channel is relatively bright. I extracted the data mainly from the various test shots of my new unguided imaging setup (an Esprit 150 on a GM1000HPS) which gives 0.7 arc seconds/pixel with my CCD. Having run yet more V-curves with FocusMax, to improve my focusing precision, I'm now of the opinion that my seeing is much better than I had previously thought, last night it was below 2 arc seconds, so having a low plate scale should help resolve DSO details. The image below represents just over 4 hours of integration time. Alan LIGHTS: 8; R:6: G:5: B:7 x 600s. DARKS:20; FLATS:40; BIAS: 100 all at -20C.
  15. Started on a bubble image tonight but the sky lower down is clear so I've switched targets - will come back to the bubble another night Managed to get 3x1800s before moving targets Hope you like...
  16. My yearly four-day autumn sojourn to Kelling Heath yielded only one picture this year. I used my Astro-modified Canon 1100D to capture 28 x 300 second subs of the area around M52 in Cassiopeia. The camera was cooled down to just 6 degC by my homemade camera cooler and this certainly led to a relatively low-noise image. The cloud we had led to the brighter stars having large haloes around them, which I had tried to reduce a bit.
  17. This is the first such image from my Mewlon. As most may know I have struggled to use the Mewlon from my location, since it need excellent skys to get the most from it. However, I have spent a lot on this telescope and definately want to get more use under my skys with it, therefore, back in October 2012 I modified it with the new corrector baffle system designed to eliminate coma. The Mewlon is a Dall-kirham cassegain telescope and these have the best on axis optical performance; however, they do have off-axis coma inherrent in their design. The corrector baffle solves this issue and lowers the effective focal length, which is what I was interested in! With the baffle in place the focal ratio drops from F12 to F10, not much change there? But with the new focal reducer it drops to F7, just a little below 2m focal length and thats the change that I was looking for. This image of the Bubble is taken a F7 using the Mewlon. The coditions were average (Seeing & Transparency) and yet I was able to use the Mewlon!!! Its not all be pain sailing, I have also had to learn to drift align on the pole. To do this I use Metaguide since its also used to confirm that the collimation of the Mewlon is spot on. Metaguide is actually able to measure the drift and report back the new value after your adjustments, so you know very quickly if you are going in the wrong direction, which is great. Anyway the image capture was as follows; Red 8x300sec Blue 8x300sec Green 8x300sec Lum 8x300sec HA 10x600sec So about 4.5hours in total, probably I need another night to get the most from the image? Another important point is at the moment I cannot flat field the Mewlon, I need to build a light box!!! This would also improve the image quality eventually. I hope you like it? I'm very pleased with the results.
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