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Thread: M86 Wide Field (Markarian's Chain) LRGB about 5˚ field

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    Default M86 Wide Field (Markarian's Chain) LRGB about 5˚ field



    Seems like all the rage to image this area and I needed a good wide field target to test the wide field rig I just constructed. This is taken with a Zeiss 135mm APO Sonnar f/2 running at f/4 connected to my QHY23 with a manual filter drawer in the chain. The new rig seems to have auto focused nicely. I took frames no longer than 20 sec to avoid blowing out some star cores -- a mistake since it costs a lot of time to process 400 subs and 96 flats as well as buring tons of time in overhead -- downloading, dithering, etc.! Next time I lets some cores blow out so the chip can do the integration in the camera. Since my images scale is 5.64"/px with this set up, I drizzled the data (another time sink) and that did a good job of converting a bunch of square stars to round ones and got me to IS 2.9. Last night there were high mostly thin clouds everywhere. Less that 20% of my frames were basically cloud free. On blinking them all, I toss 135 prior to integration. I'm fairly pleased with this first light and consider that given all the clouds it came out quite well. I look forward to trying this new rig out under better sky conditions. So, in keeping with recent posts -- can you count the fuzzies? BTW I dropped this into a solver and rendered an image with the goodies annotated which I will post tomorrow. There are dozens and dozen of fuzzies in this image. Believe it or not this is LRGB -- looks like plain L to me ;-)
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    Richard
    Mounts: GM1000HPS,CEM60,ZEQ25; Scopes: NP127is,ES102ED,ZS 71,RASA, EdgeHD1100, LS60Tha/1200B/PT; Focusers: MoonLite 2", 2.5" SCT,2x FeatherTouchMicro; Modifier/EPs: TV 7,27,35mm, ES 18mm; TV 2,4x; HT 2" flattener, TRF-2008 0.8x R&F, EHD11 0.7x
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    Default Re: M86 Wide Field (Markarian's Chain) LRGB about 5˚ field

    That's an awesome wide field image, Richard! The new rig is going to be a good one.

    Man, I wish the sky would clear up and be dark here. I'm jonesing for some galaxies.
    Bryan

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    Default Re: M86 Wide Field (Markarian's Chain) LRGB about 5˚ field

    Very nice image! Well done, Richard!
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    Default Re: M86 Wide Field (Markarian's Chain) LRGB about 5˚ field

    Wow. I like the wide field view of the area. It is just filled with galaxies!
    Carl
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    Default Re: M86 Wide Field (Markarian's Chain) LRGB about 5˚ field

    For anyone interested, more info about the new rig I cobbled together can be found here New Wide Field Rig Built
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    Richard
    Mounts: GM1000HPS,CEM60,ZEQ25; Scopes: NP127is,ES102ED,ZS 71,RASA, EdgeHD1100, LS60Tha/1200B/PT; Focusers: MoonLite 2", 2.5" SCT,2x FeatherTouchMicro; Modifier/EPs: TV 7,27,35mm, ES 18mm; TV 2,4x; HT 2" flattener, TRF-2008 0.8x R&F, EHD11 0.7x
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    Default Re: M86 Wide Field (Markarian's Chain) LRGB about 5˚ field

    Richard - it looks like your initial testing of the new rig is yielding some very nice results. Good to see your progress. In order to count the fuzzies I'd have to break it down into a grid for myself. Glancing around the image they just seem to pop out at me, edge-on, face-on and every angle in between. I see what you mean about the lack of color - it seems there is always something to work on, eh?

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    Default Re: M86 Wide Field (Markarian's Chain) LRGB about 5˚ field

    Quote Originally Posted by bobharmony View Post
    Richard - it looks like your initial testing of the new rig is yielding some very nice results. Good to see your progress. In order to count the fuzzies I'd have to break it down into a grid for myself. Glancing around the image they just seem to pop out at me, edge-on, face-on and every angle in between. I see what you mean about the lack of color - it seems there is always something to work on, eh?

    Bob
    Bob,
    If I had not needed to stay awake to manually change the filters between each run, I would have guess that the same filter had been used. But I know that is not the case. I did linear fit R,G&B to Lum, but I usually do that. When I lay the color histograms over one another they look to be a perfect match. It appears that there is no color in the image -- but how can that be. If the CCD were an eyeball, I'd say there was only enough flux to register in the rods and not the cones, but it is no eyeball and has a QE >70%. Well, you know how they say, "make lemonade when life gives you lemons" --- I'm rerunning the integration with all subs treated as Lum. If I'm not gonna get color, then damn it, I'll get SN! The integration has finished, the drizzle is grinding away. Lum with 134 subs gave me a reference noise reduction level of 3.8462. Using the color frames as Lum for a total of 257 frames gave me 4.8178. That is a pretty nice pick up for the cost of a couple of hours of CPU cycles
    Richard
    Mounts: GM1000HPS,CEM60,ZEQ25; Scopes: NP127is,ES102ED,ZS 71,RASA, EdgeHD1100, LS60Tha/1200B/PT; Focusers: MoonLite 2", 2.5" SCT,2x FeatherTouchMicro; Modifier/EPs: TV 7,27,35mm, ES 18mm; TV 2,4x; HT 2" flattener, TRF-2008 0.8x R&F, EHD11 0.7x
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    Default Re: M86 Wide Field (Markarian's Chain) LRGB about 5˚ field

    Here is the promised annotated version
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    Richard
    Mounts: GM1000HPS,CEM60,ZEQ25; Scopes: NP127is,ES102ED,ZS 71,RASA, EdgeHD1100, LS60Tha/1200B/PT; Focusers: MoonLite 2", 2.5" SCT,2x FeatherTouchMicro; Modifier/EPs: TV 7,27,35mm, ES 18mm; TV 2,4x; HT 2" flattener, TRF-2008 0.8x R&F, EHD11 0.7x
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