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Found 78 results

  1. I'm not experienced with LRGB imaging, so thought i'd give it a go on M81. However, when i combine the 4 individually processed integrations i end up with horrible colour hues across the image - they're all aligned and wotnot. Am i running into the issues of light pollution (inside the M25), which i can only remove with aggressive DBE application? Individual files attached.
  2. I've got a 5 year old desktop, which i think performs decently and does my Pixinsight processing pretty well. However, i want to change to a laptop for the form-factor, but i don't want to compromise on performance. This is my rig: https://www.userbenchmark.com/UserRun/27054387 What machine do you use and how does it perform with Pixinsight? Any folk familiar with computer hardware able to provide steer on whether i'm due an upgrade? Looking to understand how others do their processing.
  3. Hi, I have taken mono LRGB images of M51 with my new ASI1600mm-PRO. I have a mix of 30s, 60s, 120s subs. 100 darks, and 100 flats for each filter. About 4 hours total. I Used DSS for alignment and stacking, then Pixinsight for LRGB combination. My issue is that i'm not happy with the colours, the stars all appear white and the background is strange. I have attached the Aligned LRGB images. Can anyone point me in the right direction? Thanks! Green.TIF red.TIF Lum.TIF B.TIF
  4. Hello, Here's my first shot at M35. Primaluce 72ED, Astronomik CLS-CCD filter, ASI 178MC, Pixinsight. Only 20 lights of 30 sec. Biases & flats applied. There's definitely some weird things in there (a line of small red dots towards the bottom right hand corner, about an inch or so in from each edge). I don't think its a processing artefact, because it appears in the first integrated image. I tried to upload 16 bit darks but PI is again not letting me do that for some reason (but it does let me load 8 bit darks). I'm thinking it could be hot pixels (?) but wouldn't they be removed by the biases? I tried processing the lights with both 8 bit darks added, and no darks, and the image was better without the 8 bit darks. In both cases that little pattern is there. Does anybody have ideas where that's coming from (or has anyone experienced that before)? Cheers, Vin (PS: that weird motif is best seen by zooming in on the image. And then you can see it appears in other parts of the image too. It seems to already be in the image after integration, but before any other processing is done. Is there such a thing as a stacking artefact - if so, how could I avoid that? Thank you!)
  5. I recently posted a picture of B33 using my Optolong L-Enhance filter which was not too bad, a bit red, for my first time trying out Pixinsight. Last night I managed to get nearly 2 hours using my IDAS D2 LPS filter and after watching many Youtube videos I've managed to get the following using my Esprit 100ED and modded canon 450D, 21*300s Lights, flats, darks and bias frames. I think I'm starting to get my head around post processing.
  6. This is my first image using my Optolong L-Enhance dual band filter and the free version of Pixinsight, which does certainly take a lot of time to learn. I know it's not going to win any prizes but I'm quite pleased with it. Especially after all the time it's taken me to produce Master Darks, bias and flats today, luckily the weather has meant I've been stuck indoors most of the day. This is with my Esprit 100ED, Canon 450D, 24 * 300s Lights, 100 flats, 100 Bias & 30 darks. I do struggle with post processing as I'm not very artistic, so all advice on where to go forward with this will be appreciated. I am hoping to get some more subs with my LP filter to add to it.
  7. When using ImageIntegration process do you need to select "Subtract Pedestals" under the Image Integration parameters? If so do you need to do this for all images, Darks, Flats, Lights etc? Steve
  8. So I had a free day yesterday and decided to sort out my equipment and update my astro laptop software packages. I downloaded the latest Stellarium and managed to get it to sync with APT. I installed my Xmas present from my sweetheart (Optolong L-eNhance filter) how did she know it's what I wanted??? I recently installed the free trial version of Pixinsight on my main laptop so after watching a few YouTube videos decided to get some Dark and Bias frames to create some masters ready for my next session. The weather was good yesterday and it stayed clear here as the sun started to set, so I set everything up outside hoping the apps were wrong and it wouldn't get cloudy. As it got darker I launched Sharpcap and completed a polar allingment, I used Stellarium and APT to slew to Vega and checked the focus was good. I then used Goto++ in APT to slew to NGC 7380 (Wizard Nebula), I set PHD2 off guiding and then I had my first issue; my laptop would not connect to my Lyn Astro dew controller so I manually set the temperature to quite low as it wasn't too damp at that time. So I started capturing 5 minute subs went inside and remoted into my astro laptop from my main laptop to check how it was going, all appeared good. I recently set up a Rpi NAS at home so I'm able to transfer data to it and then to my other laptop on the go, so after I'd got a few subs I opened them in PI to check the quality, they looked ok to me. after about an hour PHD2 started binging a lost star warning so I went outside and the clouds were starting to cover the sky, I then took loads of flat frames using my main laptop, Notepad and 3 sheets of white paper and decided to take some more darks in case it cleared. I then set about trying to process the 9 subs I'd managed to capture with the 200 flat frames the master bias and dark frames I'd created earlier. Despite the lack of subs I'm quite pleased with the result, I have done a quick Histogram stretch, and the knowledge I have gained, I'm definately going to purchase PI when I can afford it. So this morning I thought I'd sort out the issue with the connection to the Lynx Astro dew controller, you won't believe it, my Astro Laptop will not turn on, it's been playing up for a while I suspect the battery has died. So just when I thought I was getting on top of this frustrating hobby I get another spanner in the works. So do I gamble and order a new battery then discover it is the laptop that has failed, do I set up another old laptop I have and hope it will be ok, do I set up my Rpi3 with Indigo or do I buy a mini PC as I know my way around windows? Anyway here's the calibrated stacked image as it is in PI with a quick stretch.
  9. wimvb

    Messier 88

    From the album: Liverpool Telescope

    Messier 88 galaxy 9 x 90 s Blue 7 x 90 s Green 19 x 90 s Red Some of the frames are 120 s exposures Processed in PixInsight

    © Wim v Berlo

  10. From the album: Mike's Images

    The Lagoon Nebula ( Messier 8, NGC 6523 ) in the constellation Sagittarius - by Mike O'Day ( https://500px.com/mikeoday ) The Laboon Nebula ( M8 ) is visible to the naked eye under dark skies from most latitudes except the far north. Seemingly covering an area about three times that of the full Moon, M8 actually covers an area somewhat greater than 110 light years and is around 4300 light years from Earth in the Sagittarius-Carina spiral arm of the Milkyway galaxy. Links: https://500px.com/MikeODay http://photo.net/photos/MikeODay Details: Messier 8, NGC 6523 - Lagoon Nebula. also contains: NGC 6526 NGC 6530 NGC 6533 IC 1271 IC 4678 7SGR 9SGR Skywatcher Quattro 10" f4 Newtonian telescope. Skywatcher AZ Eq6 GT Mount. Orion auto guider - PHD2. Baader MPCC Mark 3 Coma Corrector, UHC-S 'nebula' filter. Nikon D300 (unmodified) (14bit NEF). Field of view (deg) ~ 1.35 x 0.90. 20 x 120 sec ISO400. 26 x 30 sec ISO 1600. 23 x 240 sec ISO 200. PixInsight and Photoshop. 2 August 14 . re-processed 24 April 2016 to include the additional subs ( the first version only made use of the 23 x 240 sec ISO 200 subs ) and putting use the processing lessons I have learnt over the past year.

    © Copyright Mike O'Day 2016 - all rights reserved

  11. Hi everyone, I've been spending some time processing over cloudy christmas and realised the thing I find most daunting, difficult and annoying is creating star masks. So my question is - is there a way of creating star masks (in Pixinsight preferably, but open to other ways!) which is (a) always accurate (b) relatively quick (c) repeatable? I've worked through LVA tutorials and looked at David Ault's technique. I also have the Bracken book to go through. Main techniques seem to be: 1. Stretch extracted lightness, clip low, bring down highlights, then use Star Mask process - very inconsistent results I get with this approach 2. Similar to above, but use MMT/MLT to remove nebulosity to create support image, then use different star scale Star Masks to capture all stars and then use pixelmath to put them all onto one image - very time consuming I find, also lots of noise setting fiddling I am very interested to see how people go about this and whether there are any neat tips and tricks to help the process! Thanks!
  12. Update: 3rd June Re-processed to remove slight magenta tint caused by the non-uniform removal of light pollution by the DBE process ( it was being fooled by the very bright image centre ). The globular star cluster Omega Centauri ( NGC 5139 ) in Centaurus ( please click / tap on image to see larger and sharper ) A full size image can be found here. original below ..... A newly captured ( May 2018 ) image of the great southern globular star cluster, Omega Centauri ( NGC 5139 ) Omega Centauri ( NGC 5139 ) in Centaurus - ( please click / tap image to see larger and sharper ) A full size ( ~ 6000 x 4000 ) image can be found here ....... This image is an attempt to look deeply into the mighty Omega Centauri star cluster and, by using HDR techniques, record as many of its faint members as possible whilst capturing and bringing out the colours of the stars, including in the core. Image details: Resolution ........ 0.586 arcsec/px ( full size image ) Rotation .......... 0.00 deg ( up is North ) Focal ............. 1375.99 mm Pixel size ........ 3.91 um Field of view ..... 58' 20.9" x 38' 55.1" Image center ...... RA: 13 26 45.065 Dec: -47 28 27.26 Telescope: Orion Optics CT12 Newtonian ( mirror 300mm, fl 1200mm, f4 ). Corrector: ASA 2" Coma Corrector Quattro 1.175x. Effective Focal Length / Aperture : 1470mm f4.7 Mount: Skywatcher Eq8 Guiding: TSOAG9 Off-Axis-Guider, Starlight Xpress Lodestar X2, PHD2 Camera: Nikon D5300 (unmodified) (sensor 23.5 x 15.6mm, 6016x4016 3.9um pixels)\ Location: Blue Mountains, Australia Moderate light pollution ( pale green zone on darksitefinder.com map ) Capture ( May 2018 ) 8 sets of sub-images with exposure duration for each set doubling ( 2s to 240s ) all at ISO 250. Processing: Calibration: master bias, master flat and master dark Integration in 8 sets HDR combination Pixinsight May 2018
  13. Galaxy NGC 4945 in Centaurus Details: Galaxy NGC 4945 in Centaurus 19 May 2018 Orientation: North is up Telescope: Orion Optics CT12 Newtonian ( mirror 300mm, fl 1200mm, f4 ). Corrector: ASA 2" Coma Corrector Quattro 1.175x. Effective Focal Length / Aperture : 1470mm f4.7\ Mount: Skywatcher EQ8 Guiding: TSOAG9 Off-Axis-Guider, Starlight Xpress Lodestar X2, PHD2 Camera: Nikon D5300 (unmodified) (sensor 23.5 x 15.6mm, 6016x4016 3.91um pixels) image Plate Solver script version 5.0 =========== Resolution ........ 0.586 arcsec/px Rotation .......... North is up Focal ............. 1375.43 mm Pixel size ........ 3.91 um Field of view ..... 43' 27.2" x 28' 54.2" Image center ...... RA: 13 04 51.790 Dec: -49 30 37.17 ========== Location: Blue Mountains, Australia Moderate light pollution ( pale green zone on darksitefinder.com map ) Capture ( 19 May 2018 ): 10 sets of sub-images with exposure duration for each set doubling ( 1/2th sec to 240 sec ) all at ISO250. ( 41 x 240sec + ~8 each forthe other durations ) Processing: Calibration: master bias, master flat and master dark Integration in 10 sets HDR combination Pixinsight May 2018
  14. Hi, I have been plucking away with PI at this data I have of the Leo Triplet for a few days now, and I just can't get it right. Particularly color is causing me problems.. It seems to come out either very red, or really low on color. I am hoping someone would give it a whirl and see wha they can get, and maybe point me in the right direction (maybe @wimvb pretty please! :)). As I use PI it would be preferable if someone with PI would try, but anyone is more than welcome to try. The data was captured with a modified EOS 600D and an Optolong CLS-CCD filter. Stack consists of 37x240s frames at ISO1600 - calibrated with Bias, Flats and Darks in PI (Total integration: 148 minutes) https://www.dropbox.com/s/n3nerojediicz7x/integration.tif?dl=0 This is where I am at currently: Is it a matter of an 80mm refractor + DSLR not beign up to the task of capturing something like this? Clear skies! //Johannes
  15. Carina Nebula with the bright unstable star Eta Carinae in the centre of the image. edit ( 27 March ): Tweak to shadow levels to bring out more detail and also a slight reduction in the brightness of the highlights. A much larger version ( 4562 x 3072 6062 x 4082) is available on my Flickr page. previous version: Carinae Nebula ( NGC 3372 ) ( please click / tap on image to see larger and sharper ) From Wikipedia ... "Eta Carinae is a highly luminous hypergiant star. Estimates of its mass range from 100 to 150 times the mass of the Sun, and its luminosity is about four million times that of the Sun." This HDR image is constructed from 12 sets of exposures ranging from 1/8 sec ( to capture the bright centre of Eta Carinae ) through to 240 seconds. Total exposure time around 13 hours 17-19 March 2018 Image details: Objects in image: Hypergiant, Eta Carinae ( HD 93308 ) in the centre of the Homunculus Nebula Carina Nebula ( NGC 3372 ) Keyhole Nebula Open Star Clusters: - Trumpler 14, 15, 16 - Collinder 232 Field of view ..... 59' 18.2" x 39' 56.0" Image centre ...... RA: 10 45 01.762 Dec: -59 40 52.87 Orientation: North is up Telescope: Orion Optics CT12 Newtonian ( mirror 300mm, fl 1200mm, f4 ). Corrector: ASA 2" Coma Corrector Quattro 1.175x. Effective Focal Length / Aperture : 1470mm f4.7 Mount: Skywatcher EQ8 Guiding: TSOAG9 Off-Axis-Guider, Starlight Xpress Lodestar X2, PHD2 Camera: Nikon D5300 (unmodified) (sensor 23.5 x 15.6mm, 6016x4016 3.9um pixels) Location: Blue Mountains, Australia Moderate light pollution ( pale green zone on darksitefinder.com map ) Capture ( 17, 18 & 19 March 2018 ): 12 sets of sub-images with exposure duration for each set doubling ( 1/8s to 240s ) all at ISO250. ( 181 x 240sec + 10 to 20 each for the other durations ) Processing: Calibration: master bias, master flat and master dark Integration in 12 sets HDR combination Pixinsight March 2018
  16. Update 16th June: I could not wait to tell people that I was just notified that my image of Omega Centauri will be published as a future NASA's Astronomy Picture of the Day ( APOD ) - my first ever I will update the thread when they publish. ................................. A deep look at Omega Centauri ( NGC 5139 ) This image is an attempt to look deeply into the the Omega Centauri globular cluster by using HDR techniques to record as many faint stars as I can whilst retaining colour and detail in the bright stars, including at the core ... ............. Reprocessed to bring out more faint stars and to produce a smother transition between brightness levels. New version ( 12 June 2017 ): Omega Centauri ( NGC 5129 ) ( please click / tap on image to see lager and sharper ) .......... Old version: Omega Centauri ( NGC 5129 ) ( please click / tap on image to see full size and sharper ) Image details: from www.nova.astrometry.net: Size: 58.6 x 39 arcmins, Centre: 13h 26 min 50.4 sec, -47deg 28' 39.1''. Orientation: up is -89.9 East of North ( ie. E^ N> ). Telescope: Orion Optics CT12 Newtonian ( mirror 300mm, fl 1200mm, f4 ). Corrector: ASA 2" Coma Corrector Quattro 1.175x. Effective Focal Length / Aperture : 1410mm f4.7. Mount: Skywatcher AZ Eq6 GT. Guiding: TSOAG9 Off-Axis-Guider, Starlight Xpress Lodestar X2, PHD2 . Camera: Nikon D5300 (unmodified) (sensor 23.5 x 15.6mm, 6016x4016 3.9um pixels). No filter Long Exposure noise reduction off Location:. Blue Mountains, Australia. Moderate light pollution ( pale green zone on darksitefinder.com map ). Capture: 9 sets of sub-images with exposure duration for each set doubling ( 1s to 240s ) all at ISO800. Processing:. Calibration: master bias, master flat and no darks. Integration in 9 sets. HDR combination. Pixinsight May 2017
  17. File Dirbble 1.4.0 1. This version can see the fits and xisf header information. 2. You can edit the fits file header. 3. You can use full automatic file moving function by clicking the button. It uses fits and xisf's header info. FileDribble_setup_v1.4.0.zip
  18. I had another good night recovering my imaging skills on 28th with M42 as the subject. Equinox 80, Canon 1000D, 20 frames each from 2sec to 300sec at ISO 800. I used the HDR tool in PixInsight using this tutorial. I like it. I am not sure I believe all that brown stuff near the Running Man, but this is definitely the best image I have created of M42. Not what it looks like through the eyepiece, but revealing a lot more detail than previous attempts. What does everyone else think? Good, bad, meh? I have kept the processing to the minimum steps so it is possible I might be able to do more with this, but happy the way it is. Happy New Year all!
  19. Can someone please give me some guidance on processing a luminance stack in PixInsight. I've looked at a number of web resources and Keller's book but I'm still a bit confused about what I might expect to achieve - what should the end result look like. Apologies for this being M101 again and the quality of the image but it was high in the sky and convenient for a short night with non-optimal seeing. The image comprises 19x300s subs (you know I don't know why I didn't take 20 with my OCD and all that) which I've calibrated with 50 each dark, bias and flats, registered and stacked in PixInsight. I've used STF to pull the image from the background and then saved as a jpg so you can view the image. It's taken with an Atik428ex mono on a SW80ED DS-Pro + NEQ6-Pro using SGP and PHD - focussed as best I could recognising the seeing conditions. I think I am getting the hang of processing osc rgb images in PI but I'm not sure of the best approach with a luminance image and what I might expect to achieve. I've included the fit and xsif file if somone wouldn't mind having a go and showing me what is achievable and what I should typically aim for - and how! I am keen to try to get to grips with the mechanics before those long dark nights set in - whenever that might be! As ever many thanks in anticipation of any help/guidance/advice. Adrian P.S. ImageAnalysis gives me the following stats on the image: Is this good, bad or indifferent? What is 'good' and what is 'bad' or 'in need of improvement'? Thank you M101-luminance.fit M101-Luminance.xisf
  20. Conditions have been very poor down in Sydney for the last month (rain, clouds or 'darn' moon every night ) so no new images but at least I have plenty of time for lots of reprocessing ... This one was captured back at the beginning of the year and I'm still playing with it. Here I have been trying to get to grips with the HDR composition function in PixInsight. It is built up from four sets of around 20 images each at 4sec, 8sec, 30sec and 120sec all at ISO800 with my unmodified Nikon D5300. And this is the previous attempt. I think I prefer the composition, colours and contrast of the new version.
  21. Hi guys I've looked and looked for an answer to this but following tutorials has got me no nearer I've a stack of shots processed in dss and then taken the image to pixinsight when I do the stf it's pretty good but for the life of me I can't get it to save like this can any one shed some light on what I'm doing wrong I'm tearing my hair out with this one Regards Baz
  22. The Silver Coin Galaxy ( NGC 253 ) in the Sculptor constellation - updated. 24th March 2017: New version that was reprocessed ( again ) to improve colour balance ... original version below ( colours are a little too yellow ) ( click on image to see full size ) The Silver Coin Galaxy ( NGC 253 ) in the Sculptor constellation ( aka the Silver Dollar or Sculptor Galaxy ). Caroline Herschel in 1783 was the first to recordthis bright ‘nebula’ in an area of the southern sky that Nicolas de Lacaille had called the “Apparatus Sculptoris” or “the sculptor’s studio”. Whilst relatively close to us compared to the billions of far more distant galaxies in the Universe, the great size of the “Sculptor Galaxy” and the huge distances involved are still hard to comprehend. To put this into some perspective, the light that is just now reaching one edge of the great disc left the opposite edge when the Earth was in the grip of last great Ice Age 70,000 years ago and the light we now see has been travelling towards us for over 11 million years. Details: NGC 253 - "Silver Coin" or "Sculptor" galaxy. RA 00 48 23, DEC -25 11 52. Skywatcher Quattro 10" f4 Newtonian telescope. Skywatcher AZ Eq6 GT Mount. Orion Short Tube 80mm guide scope & auto guider - PHD2. Baader MPCC Mark 3 Coma Corrector & no filter. Nikon D5300 (unmodified). Field of view (deg) ~ 1.35 x 0.90. 20 x 180 sec ISO 800, long exp noise reduction on. Pixinsight & Photoshop. 4th November 2016 updated version 17 March 2017
  23. Reprocessed to try to better balance the colours ... (previous version: http://stargazerslounge.com/topic/239687-eta-carinae-nebula/ )
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