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Old 16-10-2022, 10:42 PM
Startrek (Martin)
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Join Date: Dec 2017
Location: Sydney and South Coast NSW
Posts: 6,701
NGC 1365 Great Barred Spiral Galaxy ( Re Processed)

Starved of clear nights for a month , Friday night in Sydney presented a clear night with a 70% waning moon. Seeing wasn’t too good so picked an east broadband target ( only joking ) NGC 1365 a magnitude 10 Galaxy under Bortle 7/8 skies.At my image scale and FOV this Galaxy is tiny at 4 x 3 arc mins


Finished imaging at 3.30am

6” f6 GSO Bintel Newt
Skywatcher EQ6-R pro mount
ZWO2600MC cooled to -10C Gain 100
No filters
TS Optics GPU coma corrector
189 x 60 sec subs ( dithered every 3rd sub )
40 x Flats
60 x Bias
PHD2 Multistar guiding ( poor guiding at 0.70 to 0.80 total rms )
EQMOD, Stellarium, APT
Stacked in DSS
Processed in Startools V1.8 OSC linear data set

The LP and Moon gradient was ridiculous ( first initial stretch to inspect the data was almost a “white out” ( see attached photo )
Wrestled with processing to try and dampen and remove the noise without sacrificing to much detail

Initial Stetched image showing gradients
Final cropped processed image left in Synthetic Luminance ( I tried to process the chrominance or colour but the noise grain left red mottle throughout the arms so left it in Synth Lum

Comments welcome
Thanks
Attached Thumbnails
Click for full-size image (0EE75F20-1E91-4B4E-B1D8-6D25435FE6F8.jpg)
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Click for full-size image (6B6F4B84-D452-438C-B8E3-3A42BF377CE6.jpg)
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Last edited by Startrek; 21-10-2022 at 03:51 PM.
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