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Found 21 results

  1. Galaxies in Leo Hickson 44 is a group of interacting galaxies in the constellation Leo, also designated as Arp 316 in The Atlas of Peculiar Galaxies. Inverted crop of luminance: Equipment used: Altair Astro Hypercam 183v2 mono EQ6 Skywatcher ED80 N.I.N.A. used for capture and control, calibrated and stacked in Astro Pixel Processor, post processing in PixInsight with final color tweaks and watermark in Photoshop. NGC 3190 is the nearly edge on spiral galaxy in the center of the image, with the very prominent dustlane. Lower to the right is NGC 3187 a barred spiral galaxy. Above we find the hazy eliptical galaxy NGC 3193. NGC 3185 to the lower left is not a part of the Hickson 44 group, but is another lovely barred spiral galaxy. The distance to Hickson 44 is approximately 80 million lightyears. Total integration time is around 9 hours in a bit of a mixed bag of subs. 100 minutes of luminance. 153 minutes of Red. 150 minutes of Green. 141 minutes of Blue. I made a synthetic luminance by stacking all lum, red, green and blue subs for a total luminance stack of roughly 9 hours, but it stands to reason that the contribution of the RGB only equates to a little under 3 hours of luminance. I am experimenting with just shooting RGB and combining it as a synthetic luminance, it is probably faster to get real luminance in the end. But shooting this much RGB compared to what I normally do, made it a little easier to process I think. More details and a full resolution version here: Astrobin Question: I am getting quite a bit of split color stars, I am assuming this is to do with the less than perfect correction of my optics? Comments and criticism is always welcome!
  2. Hi everyone, One and a half clear nights for me early in the year and I focused on M45. As a naked eye visible target, I think subconsciously I never gave M45 the concentration it deserves, thinking I could always catch it another time. Anyway, despite lusting after the Horsehead, I kept my refractor pointed at the seven sisters in new moon skies and the result is below. I actually found it pretty hard to process...the seven sisters themselves were pretty well behaved, but I couldn't decide what to do with the background. I know this is a dusty region so I did not want to put DBE samples everywhere. But at the end the background seems a bit smudgy after tweaking curves - I'm not sure whether to darken the background or leave it as is. 3.4 hours of LRGB integration. Full details on Astrobin. Thanks for looking!
  3. Hi All, I am posting what I suspect is a newbie mistake question but hoping that someone can assist with the issue of flats. Although I have been fumbling around the sky, taking snaps at leisure, recently I became serious. I have read up about the different calibration files (flats, darks, bias) and they seemed to make sense; different ways to capture the image defects and extract those from the image of the sky. After a few weeks (months) of further fumbling I went back to the very first target to receive my attention, M42 Orion Nebula. In short, I took 20x 30s exposures in LRGB and ran these along with 20x LRGB each of darks, bias and flats. To obtain the flats I used a diffuse sheet of perspex (lightbox material) and an LED video lamp that has 180 white LEDs, turned to its lowest setting. Attached below is the stacked Luminance flat and the light image. In the lights I am getting very strong marks from dust and I had thought that the flats would subtract this but looking at the flats the marks are completely different shapes and do nothing to remove them from the lights. The attached has been further stretched to show the issue. Now, I am obviously doing something wrong but I have no idea what, any pointers from the vast pool of knowledge will be much appreciated. Thanks, Anthony
  4. badgers

    M57 ring nebula

    From the album: Badgers - Astrophotos

    M57 The Ring Nebula 50 minutes Luminance in 10 min subs 25 minutes each of RGB in 5 min subs Atik 460ex
  5. Hi, i have a problem with my atik camera, not sure if its just me or the camera but every time i try to combine diferent chanels i get realy washed out pic, almost no color in them, all chanels look almost the same, i checked the efw but it works fine, so i have no idea what i'm doing wrong. please help :) ps. sory for my broken english. pps. here is link for M51 files that i shot with camera, if some one wants to check if they get the same result. https://drive.google.com/open?id=1X1EcBT5WLIe2uSsWM5zYsTNATk80ZgyP Urban
  6. M63 galaxy,taken over several nights, in LRGB, through a skywatcher MN190, an atik 314 mono. Could have done with more images per stack, but though it was worth a share being its the first time ive tryed proper colour. Each colour was between 12-15 at 6 mins.......
  7. Hello all, I started a while ago a topic to show my progress on this target over a couple of years. Now I think I have a final image for this season. I will have to move soon and the clouds don't seem to let me see it again until then. Maybe if I get to travel to a dark site, but then I will go full resolution. Equipment used is a 130PDS with SW coma corrector, ASI1600MMC camera cooled to ~-15C, put on an AZ-EQ5, guided with OAG. Guiding accuracy was reported between 1.3" and 2" depending on the seeing. The window frames only allowed me to see the target for ~2.5h/night. Some nights had clouds, some not. Luminance was taken during 6 or 7 nights for a total of 156x180s frames at unity gain, through a visual CLS filter. That means 7h 48min. The visual CLS seemed to provide better results than the L (IR/UV cut) filter and the coma corrector didn't seem to add chromatic aberrations. Each RGB channel is made by ~60x60s at unity gain too. Ha, if I remember well, is just above an hour worth of 60s frames at 300 gain. I resized the images to 50% since they didn't provide more detail at full resolution due to poor seeing. Processing was done with StarTools and GIMP. Some star reduction. Red/white light pollution. If I missed other significant details that you're interested in, please tell. 16bit .png here: https://drive.google.com/open?id=0ByhJ_xuQxcnjWHU1RWM0OVFmNG8 Or astrobin: http://www.astrobin.com/313011/ Thanks for looking and clear skies! Alex
  8. Took ths Trifid Nebula photo on the 16/7/2015. Photo Details: Luminance: 4x5Min Total:20Min RGB: 4x5Min for each RGB Channel. Total RGB: 60Min Total Exposure: 1:20 Min Telescope: SkyWatcher P250 10'' F/4.8 Camera: QSI583 Mount: ASA DDM60 Filters: Astrodon LRGB GenII No Guiding! http://www.flickr.com/photos/101543943@N04/19373322294/in/dateposted/ Enjoy Haim Huli
  9. Hi Last night i imaged M42, and just as my sequence was about to start imaging the blues, the target went behind my garage. As such, I have no blue data. I use PixInsight to process the data. My question is this... What can I do in PixInsight to cope with the missing blue data? I have calibrated / stacked / DBE'd my LRG images and a quick RGB ChannelCombination is shown below. It has a horrible tint to it, SCNR makes it no better. Then LRGBCombine doesn't have a great effect. Is it worth waiting for another night to image the blues before trying to process it? Thanks Joe After stacking / DBE / Channel Combination (RG only), Before SCNR: After SCNR: After SCNR, with LRGB Combination:
  10. Here goes one of the summer targets! M45 was shot from the top of mountain Parnon, which is really dark. Lx10 1x1 300secs RGBx22 2x2 80 secs Still learning pixinsight and this was my first try on LRGB (i usually go for just RGB) Full resolution and annotation here Looking forward for your critique! Thanks
  11. I have a question regarding LRGB exposure times. From what I have read it is recommended that you take x3 times the exposure times with your coloured filters than the Luminance due to these letting less light through. I also understand that you can reduce this time by binning the coloured subs, however from previous threads I have read and worked out that my Arc Seconds per pixel is 3.18 unbinned which leads me to my dilemma. The largest Arc Seconds per pixel for my setup is 3.4 (FL 351mm) so binning is not ideal as it will increase my Arc Seconds per pixel to over 6 which could lead to issues with massive star bloat? I have also read that really I should be aiming to take as long and as many luminance subs as possible. So if I take a 10 minute luminance sub then I should take 3x10mins i.e. 30mins for each coloured filters? So for an hour of luminance I would need to take 3 hours of each filter? Giving me 9 hours of coloured filters for 1 hours of Luminance, a total of 10 hours?! What is the best way to approach this? Is it that important to take x3 RGB the exposure time? How can I reduce this down from 10 hours as I don’t have an Observatory and have to put up with the UK weather. Could I bin the colour channels and leave the luminance at 1x1? Will the potentially bloated star issue from binning and giving me +6 Arc Seconds PP be an issue or can I get away with this as the colour channels are only used for their colour and not for detail such as stars? I realise that it will also depend on the target and some of the colour can be adjusted in post processing though at the expense of adding noise. I would be interested to hear other people’s opinions on what, where and if they reduce exposure times down on similar setups. Thanks
  12. Yesterday's (27.11.17) 8 day old Waxing Gibbous Moon (60% illuminated) imaged at 18:00UT using LRGB filters. Seeing conditions were fair, with some faint fast moving cloud. Altair Astro StarWave 102ED f/7 refractor Altair IMX174 mono Hypercam ZWO Mini EFW Altair LRGB filter set SkyWatcher AZ-EQ6 mount Best 15% used of 1000 frames for each filter. Captured software SharpCap 3.0 Stacked with AutoStakkert 3.0 RGB channels combined and Lum added for sharpness, post processed with Photoshop CC 2018 Can also view on Flickr - https://flic.kr/p/21WynTP
  13. Dec

    NGC 861

    From the album: Dec

    Lum - 16 x 300s RGB - 12 each x 300s
  14. Well, this is my first ever "proper" LRGB effort using my Star 71, from a rather light polluted garden in Portchester, Hants. Getting on for 10 hrs in total exposure time. Processed in PI (thanks Kayron) and PS (thanks Olly), but I still haven't worked out how to tease the colours out properly (Olly, I can't find your method on here - I must be searching with the wrong terms..) 51*180s luminance, 49*180s red, 45*180s green, 49*180s blue I'm actually very happy how it's come out, despite the various technical challenges along the way! PS - anyone on here able/qualified to collimate a 5 element astrograph for beer tokens? lol.
  15. This is the first "proper" image from my rebuilt 14" Newtonian - has been a long time coming, and more tweaking to follow, but pleased how it performed. I've made a light box which works well and used data from evenings of 13th/15th Feb to create this image (but this showed the R channel, I think, where the OAG impinges and throws an odd reflection and doesn't reduce nicely - need to sort.... :-/). This is M106 and NGC 4248 (and a load of other faint fuzzies including at least one z>1.0 QSO right at the far left edge of the frame, as well as lots of anonymous galaxies that don't feature in anything in Simbad/Vizier). North is roughly down in this image. L: 5h35m (56x5m + 21x3m) R: 1h45m (21 x 5m, 2x2 bin) G: 1h20m (16 x 5m, 2x2 bin) B: 1h20m (16 x 5m, 2x2 bin) ST2000XM (@-20C), 350mm double truss Newtonian @ f4.53 (1584mm FL), Losmandy Titan. Guiding via ASI120mm on OAG. Reduction and Processing in Pixinsight. The L channel behaved nicely; colour less so, and was a bit of a challenge to get it to behave, especially the background which I needed to be quite firm with to remove blotchiness. I think really the moral is: more data... a bit more colour (and lum!) data might allow a bit more from the outer reaches and a much smoother background, but clear skies are what they are... Haven't got any HA here to bring out the jets, but the brightest (above/south of the core) is just about visible. All comments/suggestions/improvements appreciated! Thanks for looking. LRGB: Lum channel (pushed a touch more than the above...) - EDIT: had a tweak of it:
  16. M42 took quite a bit of processing time. That is a bright core even with very short exposures. Then how much of the fainter stuff do you try to pull out? There might be more to be found in the data, but I am trying to keep things looking 'natural'. Then again, what is 'natural'? I'd be interested to hear what people think. Data capture was completed in February 2017. It consists: Luminance: 15x15" bin 1x1 Luminance: 16x60" bin 1x1 Luminance: 16x600" bin 1x1 Red: 8x15" bin 1x1 Red: 8x60" bin 1x1 Red: 16x600" bin 1x1 Green: 8x15" bin 1x1 Green: 8x60" bin 1x1 Green: 16x600" bin 1x1 Blue: 8x15" bin 1x1 Blue 8x60" bin 1x1 Blue: 32x600" bin 1x1 TOTAL = 14.2 hours Astrodon filters from the Tak 106/QSI 683 rig at DSW.
  17. This is only my second proper image with my new camera and the only the second LRGB image I've done. I think lots of the issues with the first have been resolved in this, but not all. My processing needs work too. ASI178MM-Cool 133 x 120s Lum @ -20C 30 x 60s RGB @ -20C 130 PDS on an NEQ6 Stacked in DSS and processed in Photoshop CS5
  18. My first real go at LRGB, had a nice clear night and 4 hours spare on Saturday. M101 was nice and high so decided to give it a go. MN190 & 383L+ OAG and modded webcam 20x300s L 6x300s R 6x300s G 6x300s B All bin 1x1, Flats,darks and bias applied and stacked in DSS Had to throw away 8 subs due to satellites which was particularly annoying, seemed worst than normal, I'm guessing it's something to do with imaging directly above? Processing was tricky and the image has an odd gradient at the bottom left and the star colours are wrong, some burnt out and the colour is a bit too purple I think on the galaxy buuuut but I'm pleased with this one for starters. Needs more RGB subs. Thanks for looking Keith
  19. Am I being a bit dim here, but if I'm taking my R, G, B subs all at full resolution of the camera - no binning - (cam is an ASI 1600MM-Cool), then I'm assuming that I don't need any L subs? My understanding is that I only need L sub if I'm binning the RGB to enhance the detail. Thanks in advance Neil
  20. From the album: Badgers - Astrophotos

    First test of my Atik 460ex LRGB (50mins L, 15mins each RGB, 1x1 binned)

    © Anton Enright 2012

  21. Hi SGL members! As I'm moving to 2" filters I wish to sell my 1.25" mounted filter setup. This setup consist of a kit of Baader LRGB as seen here for example: https://www.teleskop-express.de/shop/product_info.php/language/en/info/p563_Baader-LRGB-CCD-Filtersatz-1-25----Interferenzfilter---4-Filter.html @268 Euros plus the piece de resistance, the Astrodon 3nm ones; Ha, SII, OIII. New they are 608 Euros a pop.... Example: https://www.teleskop-express.de/shop/product_info.php/info/p5153_Astrodon-1-25--Narrowband-Filter-H-Alpha-3nm-mounted.html I will part with the LRGB set for £150 and the Astrodons for £450 each of £1200 for the lot of three. That is effectively most of the haggling done already. These filters rendered me six AAPODs in one year alone, and that was with mediocre OTAs and substandard processing skills... I can accept PayPal, UK or French, UK or European Bank transfer, I can ship from the UK or France, no problem as I tend to go back and fourth. Let's say £7.50 per filter shipping cost for insurance purposes. They will also be available for pickup in London shortly. The filters have never been cleaned or wiped. They have lived in Atik Filter wheels as long as I had them. Below: LRGB set to the left, Astrodons to the right. /Jesper PS There might be an ATIK EFW2 up for grabs too once these are gone ;-)
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