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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!
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!
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.
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.