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Paramount

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Posts posted by Paramount


  1. Hi

    A rarity occured last night in that I had a clear night that coincided with me having a night off so I managed to get just under 4 hours of data for OIII to go with the Ha I got a few night ago. This is 15x20 minutes for Ha and 11x20 minutes for OIII with Ha mapped to R, OIII mapped to G and 20% Ha and 100% OIII mapped to Blue. I'm keeping my fingers crossed so that it is going to be clear again tonight so that I can get the SII data. The Ha channel can be seen on my website http://www.imagingtheheavens.co.uk on the Nebulae 2 page of the image gallery

    Thanks for looking

    Best wishes

    Gordon

    ic1318rg1200.jpg


  2. Hi All

    I have just started another 3 part project, this time it is the nebula complex surrounding the star Sadr. While I was waiting for NGC7000 to clear a neighbours tree a couple of weeks ago I managed to get an hour of this and a couple of nights ago I managed to get another 4 hours of Ha data (luckily this subject has already cleared the tree). This area is awash with hydrogen clouds and there is a lot of intricate detail. As with my previous images I will be adding the OIII and SII data as time and weather allow.

    This is a total of 15x20 minutes with a 5nm Ha filter using the Starlight Xpress H36, an FSQ106ED at f5 on a Paramount ME with auto guiding done via an OAG and Lodestar with dithering. Please check out the full res version on http://www.pbase.com/imaging_the_heavens, just click the thumbnail picture and then click on the "IC1318 - Sadr Nebula in Ha" thumbnail at the bottom of the page

    Thanks for looking

    Best wishes

    Gordon

    ic1318ha1000(1).jpg


  3. Hi All

    Following on from my earlier postings of this subject, first in Ha and then a Ha/OIII colour image, I managed to get out last night and get 3 hours of SII data in 20 minute subframes. This is now finished and hopefully tonight I am going to move on to IC1318.

    Details for this image are

    Takahashi FSQ106ED at f5

    Starlight Xpress H36 with 5nm Ha,OIII and SII filters

    Paramount ME auto guided with Starlight Xpress Lodestar/OAG using dithering

    9x20 minutes SII, 8x20 minutes Ha and 8x20 minutes OIII mapped to the HST palette so SII:Ha:OIII = R:G:B

    The earlier images are on the Nebulae 2 page of the image gallery on my website http://www.imagingtheheavens.co.uk and a full high resolution image is on http://www.pbase.com/imaging_the_heavens but be warned that it is an 18 MB file so it may take a while to download

    Thanks again for looking

    Best wishes

    Gordon

    ngc7000hst1920.jpg


  4. Hi

    You will remember that I started this image just over a week ago in Ha, well I managed to get another clear night to go out imaging in between the cloudy skies and work, I managed to get 8x20 minutes again using the FSQ106ED and Starlight Xpress H36 with a 5nm OIII. A lodestar via OAG was used for guiding with dithering invoked. On the subsequent sub frames there was much less OIII evident than the Ha and what there was showed very little in the way of structural detail but I am sure that it will contribute to the final image. For the blue channel I used 20% Ha added to 100% OIII when colour combining in Maxim DL (not sure if this correct, any suggestions would be appreciated). I am now going to have to wait until at least Sunday to continue with this or the middle of next week, at the moment this target is not available until about 12.30am courtesy of a neighbours tree. The Ha version is on my website http://www.imagingtheheavens.co.uk on the Nebulae 2 page of the image gallery. A full size version will be added to my other website http://www.pbase.com/imaging_the_heavens when I am back at home

    Thanks for looking

    Best wishes

    Gordon

    ngc7000rg1000.jpg


  5. Hi

    A clear night last night albeit with limited imaging time due to the short nights, this is the first stage of a colour narrow band image of this area. It was taken with the FSQ106ED f5 and Starlight Xpress H36 with a 5nm Ha filter, 8x20 minute exposures with guiding via the Lodestar and OAG on a Paramount ME with dithering used. I have had a go two years ago at both of these objects but separately and these can be seen for comparison on the Nebulae page of the image gallery on my website http://www.imagingtheheavens.co.uk

    Hopefully the weather will play ball so that I can get the rest of the data.

    Thanks for looking

    Best wishes

    Gordon

    ngc7000-1000.jpg


  6. Hi

    Despite the moon being almost full and in the sky all night I just had to make the most of the clear sky so I thought I would do a reshoot of M3 which I tried last year, this was taken with the FSQ106Ed and H9 with 16x5 minutes each for RGB and 6x5 minutes for Luminance (ran out of time), had to use gradient xterminator to reduce the light pollution gradient from the moon and artificial lights. The previous image can be seen on the star clusters page of the image gallery on my website http://www.imagingtheheavens.co.uk

    Thanks for looking

    Best wishes

    Gordon

    m3lrgbhigh.jpg


  7. Hi All

    I went to NEAIC and NEAF in Suffern between April 15th and 19th and I am still here courtesy of the volcano in Iceland and may be stuck here for some time yet the way things are going. Luckily I brought my laptop with me and there is free WiFi at the hotel so I was able to upload pictures and a short video clip to my website. You can see these at http://www.imagingtheheavens.co.uk and click on the "NEAF 2010" tab. Please excuse the quality but all pictures and video were taken with my mobile phone. The exhibition was huge especially in comparison with Astrofest in London. I hope to get back to the UK at some point but things are looking a bit bleak at the moment what with all the back logs and now more ash cloud eruptions in Iceland

    Thanks for looking

    Best wishes

    Gordon


  8. Hi

    Normally I don't do galaxies or star clusters as it involves RGB imaging and that is very difficult from where I live because of the light pollution but as the emission nebulae are moving out of target range for a couple of months I thought I would give this target a try as the sky was clear even though there was a half moon in the sky and gradually rising fog during the evening which eventually called a stop to proceedings at about 2am by which time you couldn't see any detail in the galaxy on the downloads. I took this with the the Takahashi FSQ106ED and Starlight Xpress SXVF M8C (OSC camera with 3.15 micron pixels), I managed to get 14x20 minutes (should have used longer subframes for this pixel size in hindsight) and it was taken through a clear filter (the luminance filter on my filter wheel), getting a guide star was pretty tricky using the OAG and I had to lengthen the guide exposures to 5 seconds binned 2x2 and even then the guide star was very faint, after crossing the meridian and doing a flip this was fine though as a brighter one was present. The image looks a bit soft and fuzzy which I suspect is partly due to the fog but this gives me something to aim for when I try it agan with the H9 and filters hopefully under better conditions. A full resolution image is available on one of my websites http://www.pbase.com/imaging_the_heavens

    Thanks for looking

    Best wishes

    Gordon


  9. wow mate, that is a top image. Can that image be seen through a telescope? how big would the scope need to be?

    Bob

    Hi Bob

    Thanks for the comments, I am not sure if it would be possible to see this through a scope unless you had very dark skies, a seriously big scope ie more than 24" and widefield eyepiece like a nagler, even then if it were visible itwould be incredibly faint

    Best wishes

    Gordon


  10. Can't find it mate. Can you post a direct link to it.

    Cheers

    Ray

    Hi Ray

    If you go to the second link in the post, click on the small thumbnail picture 'imaging the heavens' on the main page and then scroll down the next screen and click on the last thumbnail picture (most recent image) this sould take you to the full resolution image, but here is the direct link anyway

    http://www.pbase.com/imaging_the_heavens/image/122495352

    Best wishes

    Gordon


  11. Hi All

    This is one of those subjects where I have had several attempts since I started imaging the night sky, this is a wide field shot taken with the Takahashi FSQ106ED and Starlight Xpress H36 on a Paramount ME. It is 10x20 minutes witha 5nm Ha filter with auto guiding done by a Lodestar camera and OAG using dithering. Although it was clear there was a lot of sky glow even before the moon came up.

    This is a relatively faint object and really does benefit from the longer 20 minute sub frames even at f5. Hopefully if I get time and some more clear weather I will add the OIII and SII otherwise it will have to wait until it comes round again later in the year. My earlier efforts can be seen in the image gallery of my website http://www.imagingtheheavens.co.uk and a full size high resolution uncropped image can be seen on my oher website http://www.pbase.com/imaging_the_heavens

    Thanks for looking

    Best wishes

    Gordon

    cone1920high.jpg


  12. Hi

    I have been having problems with star trailing due to differential flexure which was more noticeable on the longer sub frames so I decided to try an OAG which along with the necessary adapters has arrived so last night I managed to put it to the test. I thought I'd try the Rosette Nebula and this is 6x20 minutes for Ha and OIII and 3x20 minutes for SII (a big oak tree about 40 yards away stopped further progress). Hopefully I will get some more data later on. The star trailing seems to have been resolved and the OAG was easy to set up as it has a helical focuser built in.

    This was taken with the FSQ106 and H36 camera on a Paramount ME using 5nm NB filters. Dithering was used in the auto guiding. I have made several attempts at this object since I started imaging and these can be seen in the image gallery on my website http://www.imagingtheheavens.co.uk

    Thanks for looking

    Best wishes and clear skies

    Gordon

    RosetteHSThigh.jpg


  13. Hi

    I have been having another look at the image of this subject that I posted earlier and using the same data I completely reprocessed it to bring out the nebula a bit more without lightening the background and using selective colour adjustments have increased the contrast between the colours in the nebulous cloud particularly in IC444 (the cloud to the left of the image). I prefer this version as it is less predominantly green than the original version. The downside is that there is some mottling evident in the sky background but I can live with that until I get more data on this. The different stages of how this image has developed for me since I took the original Ha shot can be seen on the Nebulae 2 page of my website http://www.imagingtheheavens.co.uk

    Hope you like it and thanks for looking. I am working tonight so enjoy the celebrations

    Best wishes and clear skies for the new year

    Gordon

    IC443repro1920.jpg


  14. Hi

    A week or so ago I posted a Ha image of this subject and 2 weeks ago I managed to get some OIII and posted a Ha (OIII+Ha) OIII composite. I managed to get some SII data last night in between the clouds (which as usual weren't forecast as it should have been clear all night). The image is made up of 11x20 minutes Ha, 12x20 minutes OIII and 9x20 minutes SII.

    All the subframes were taken with a FSQ106ED and Starlight Xpress H36 with Astrodon 5nm NB filters. 10x20 minutes darks were used for calibration. The filters were mapped to the HST palette ie SII,Ha,OIII = RGB. I did have a look at doing a CFHT version of Ha,OIII,SII = RGB but on looking at it the colours gave me a headache. The seeing wasn't particularly good last night as there was a lot of low lying mist which eventually put a stop to the imaging session at 4am. I would have liked some more data but the weather is very unpredictable at the moment, there is supposed to be heavy snow early in the morning which means we will probably get a mini heatwave. The Ha and HaOIII versions can be seen on an earlier thread here or on the nebulae 2 page in the image gallery of my website http://www.imagingtheheavens.co.uk

    Thanks for looking

    Best wishes and a happy new year to all

    Gordon

    IC443HST1920high.jpg


  15. Hi Patrick

    It is the narrowband filter that suppresses the star light as stars are predominantly broadband emitters most of the light is diminished, when using a band pass as narrow as 5nm some of the fainter stars won't register at all. It is possible to go as low as 3nm with narrowband filters but a Ha filter that is between 5nm and higher also allows NII through as this emission line is very close to the Ha line but when you drop below 5nm it blocks the NII line as it now falls outside the bandwidth, this basically means that you will lose a bit of detail, it is possible to get this back by taking a separate set of exposures through a NII filter, all of this is explained better on the Astrodon website. The upside of using narrower band pass filters is that more of the ambient light and light pollution is cancelled out so more detail and sharpness is evident and the contrast between the nebula and sky background is greater, both of which I hope are evident in this image. The downside is that the filters are more expensive and to get the best out of them 20min+ exposures depending on scope and camera are necessary. No processing was done to debloat or suppress the stars, this was just levels, curves, contrast, sharpening and brightening and nothing more

    Best wishes

    Gordon


  16. Hi

    I apologise for yet another picture of the Horse Head and Flame but it is one of the most photogenic sights in the night sky especially if you go deep. This is 6x20 minutes with an Astrodon 5nm Ha, Starlight Xpress H36 and FSQ106 on the Paramount ME, autoguiding was done with an H9 on a TMB115 with dithering. I am still having problems with what I think is flexure causing star trailing, this is more evident in the longer subframes and I will probably go down the OAG route which should resolve this issue. I find it is good to revisit subjects and this is one my first ones that I took 2 years ago. I also took an image of this last year but with 10 minute subs with the TMB with an unconventional palette of HaSIIOIII = RGB and I plan on doing the same with this subject this time round so this currently a work in progress. My earlier efforts can be seen on the nebulae page of the image gallery of my website http://www.imagingtheheavens.co.uk

    Thanks for looking

    Best wishes and Merry Christmas to all

    Gordon

    B33Ha1000.jpg


  17. Hi all

    I took an image of IC443 in Ha a couple of weeks ago with the FSQ106 and H36 combination, I managed to get 4 hours of OIII data on Friday night. It is 12x20 minutes guided on the Paramount ME. I am having some problems with weight distribution at the moment as the FSQ sits on top of the BRC-250 and may be causing some flexure issues leading to star trailing. I will probably have to alter the arrangement of the scopes and take the BRC-250 off when not being used. I was uncertain as to how to combine the Ha and OIII data as I have seen many different combinations regarding HaOIIIOIII for RGB, creating a synthetic green channel, creating a pseudo Hb channel from the Ha and OIII data and so forth. I am still experimenting but settled on 20% Ha added to OIII for the green channel and Ha for red and OIII for blue. I am hoping to add some SII to this when the weather clears again but for now have to be grateful for any clear weather. The Ha version can be seen on an earlier thread here or on my website http://www.imagingtheheavens.co.uk

    Thanks for looking

    Best wishes

    Gordon

    IC443HaOIII1000.jpg


  18. Hi

    This is another of the first images that I have managed to get with the FSQ106 and Astrodon filters, I was hoping to get both the Heart and Soul Nebulae together in one shot but couldn't quite fit them both in so I will be doing separate widefield colour shots at a later date. This is 12x20 minutes with a 5nm Ha filter. The moon was nearly full and fairly high when this was taken almost 2 weeks ago. The 20 minute subframes are certainly helping to bring out more detail. I ahve had several attempts at this subject, both in Ha and tri-colour narrow band with different scope and camera combinations but all previous ones were with 10 minute exposures, these can be seen in the image gallery of my website http://www.imagingtheheavens.co.uk

    Thanks for looking

    Best wishes

    Gordon

    IC1805high.jpg


  19. Hi All

    We had another clear night on Thursday although the moon was full and high again. This is 12x20 minutes with the FSQ106ED and H36 with a 5nm Ha filter. The Lodestar autoguider was playing up so the guiding was done by my M8C camera. I last tried this over a year ago with the TMB115 but only did 2x15 minutes, this can be seen on the nebulae page of the image gallery on my website Imaging The Heavens - Home Page

    A full high resolution version of this can be seen at http://www.pbase.com/imaging_the_heavens/image/119992157

    Thanks for looking

    Best wishes

    Gordon


  20. Hi All

    Finally there was a clear night (the only fully clear night for November) so I managed to get everything set up and shot this 12x20 minute sub image of the Jellyfish nebula in Auriga. The moon was vitually full and overhead for most of the evening so it was mainly Ha imaging for that night. Taken with the FSQ106ED and H36 with 5nm Ha filter. An earlier effort at this in colour can be seen on the nebulae page of the image gallery at my website http://www.imagingtheheavens.co.uk

    I will be adding the other channels to this at a later date

    Thanks for looking

    Best wishes

    Gordon

    IC443Hahigh(1).jpg


  21. Hi All

    I have recently got myself a Takahashi FSQ106ED and some 50mm square 5nm narrow band and LRGB filters and an FLI CFW-5-7 filter wheel. The filter wheel is huge (see below) and adds quite a bit of weight to the scope side of the mount so it is currently out of balance which I am in the process of resolving. I finally managed to give it first light last night (very briefly as the weather didn't play ball). I managed to get 2x20 minutes for IC405/410 which I am quite pleased with as the tadpoles show up really well and 4x10 minutes for the Rosette nebula. I only had chance to image through the Ha filter as the mist was rising fast and at 2am the clouds came in and that was it for the night.

    The images are noisy and you will have to excuse the processing but I didn't have a lot of data to play with. Auto guiing was with the Lodestar camera and the mount was a Paramount ME. When the weather is a bit kinder I will be concentrating on some widefield shots with this scope.

    Thanks for looking

    Best wishes

    Gordon


  22. Hi Trevor

    The problem with the brighter stars is down to the Ha and OIII filters which in the case of Astronomik filters there is a known issue with halos with the OIII and SII filters, this was difficult to deal with in the processing and this is the best compromise I could get, this issue should be resolved when my new toy(s) arrive

    Best wishes

    Gordon

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