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Bubble Nebula : NGC 7635 & Messier 52 in RGB-SHO, 





    
        

            Daniel.P

Bubble Nebula : NGC 7635 & Messier 52 in RGB-SHO

Technical card

Resolution: 4586x3441

Dates:Aug. 10, 2018Aug. 11, 2018Aug. 15, 2018

Frames:
AstroDon 5nm Ha filter: 9x600" (gain: 139.00) -15C bin 1x1
AstroDon 5nm Ha filter: 6x600" (gain: 139.00) -18C bin 1x1
AstroDon 5nm OIII filter: 8x600" (gain: 139.00) -15C bin 1x1
AstroDon 5nm OIII filter: 6x600" (gain: 139.00) -18C bin 1x1
AstroDon 5nm SII filter: 7x600" (gain: 139.00) -15C bin 1x1
AstroDon 5nm SII filter: 6x600" (gain: 139.00) -18C bin 1x1
ZWO new B: 6x120" (gain: 139.00) -15C bin 1x1
ZWO new G: 6x120" (gain: 139.00) -15C bin 1x1
ZWO new R: 6x120" (gain: 139.00) -15C bin 1x1

Integration: 7.6 hours

Darks: ~7

Flats: ~6

Flat darks: ~10

Avg. Moon age: 11.05 days

Avg. Moon phase: 7.72%

Mean SQM: 21.10

Mean FWHM: 1.90

Temperature: 18.00

Astrometry.net job: 2360375

Locations: Duc, Prayssas, Lot et Garonne, France

Data source: Backyard

Description

I performed all guiding now using my modified version of PHD2 to do Multi Star Guiding.
The guiding is good : I have obtained 1.8 to 1.9 arcsec on the central part of the final image (before deconvolution & measured in PI as Moffat 4).

But now I really have to adjust the position of the field flattener as the corner of the image show some coma.

I have to improve the color of the Open Cluster stars ...

The processing was done in PI as follow :
For each R ,G ,V, Ha, OIII & SII channels :
- Flat Field Dark Substraction
- Flat Field Integration
- Images Calibration (Dark Substraction and FF correction)
- Cosmetic Correction
- Image Registration
- Image Integration
- Noise Reduction (Demure)

Using each integrated channel :
- Created RGB color image using channel combination
- Created RGBSHO image using NBLRGB combination tool
- Color balance on stars using a star mask
- Color balance on nebula with mask
- Crop image
- Remove residual background non uniformity using DBE
- Slight deconvolution with background and bright star protection
- Perform SCNR (neutral 70%)
- Nonlinear Image Creation
- Color boost using mask to protect background with boost in blue
Final image adjustments performed in Iphoto on Imac (levels adjustments and deflip)

Comments

Author

Daniel.P
Daniel.P
License: None (All rights reserved)
590
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Bubble Nebula : NGC 7635 & Messier 52 in RGB-SHO, 





    
        

            Daniel.P

In these public groups

ZWO ASI1600MM/QHY163M