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Old 08-05-2024, 05:09 PM
Startrek (Martin)
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NGC 5128 Centaurus A Galaxy Re Process

Decided to re process NGC 5128 Centaurus captured back in March this year mainly because I wasnt happy with the previous image. Even though it was only a single night capture ( about 4 or 5 hours total integration) down at my Dome under Bortle 3 skies , the data set was pretty clean.

NexDome Obs on South Coast
10 f5 Carbon Newt
EQ8-R pro mount
2600MM -10c , Gain 0
Antlia filters
2 min dithered subs
Lum 2hrs
Red 1 hr
Green 1 hr
Blue 1hr
Full calibration suit ( Flats , Dark Flats , Darks )
Stacked in ASTAP
Processed in Startools v1.8

Binned to 65% to improve SNR
Increased ROI in AutoDev stretch
Bumped up Gamma a few notches
Increased Sharpening a few notches
Increased SV Decon to 14 iterations , adjusted de ringing to suit
Changed colour mode to RGB ratio / Luminance retention
Increases De noise to compensate for above changes

In pretty happy with this latest version , a bit more detail, brightness and contrast than the original

Thanks for looking

Comments welcome

Martin
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  #2  
Old 08-05-2024, 05:20 PM
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strongmanmike (Michael)
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Great looking image there Martone, only thing for me is, the halo looks a tad too blue

Nice nights work

Mike
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Old 08-05-2024, 09:11 PM
Startrek (Martin)
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Thanks Mike,
Appreciate your comments
Yea I played around with the halo colour and yes agreed its a tad too blueish but I also bumped up the red and green to give that traditional tan halo colour but I noticed it did hide some of the fainter filigree either end of the main band so left it a tad blueish.
SV Decon worked well in tightening up all the detail ( de blur )
Pretty happy with this re process with only a hand full of hours on this Galaxy.
Cheers
Martin
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Old 09-05-2024, 09:03 AM
Dave882 (David)
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Nice one Martin. Glad to see you managed to find a hole in the clouds!! I think your dark sth coast sky has helped to pick up that very expansive halo- it never quite looks that big from the burbs! Nice faint detail.
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Old 09-05-2024, 03:10 PM
Startrek (Martin)
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Thanks Dave,
From my Sydney B8 location Id never get a result like that , even with a stack load of hours
Nothing beats darker skies for Broadband imaging during the New Moon period , especially galaxies
Cheers
Martin
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Old 09-05-2024, 03:57 PM
TrevorW
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True about darker skies Martin but us burbs do our best considering
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