Contains:Cone nebula, Christmas Tree cluster, NGC 2264, NGC 2252, NGC 2251, IC 448, NGC 2244, IC 2169, Rosette nebula, NGC 2239, NGC 2236, The star 15Mon, The star 13Mon, The star 12Mon, The star εMon
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HA-LRGB, 




    

        Marcus Wögerer
HA-LRGB

HA-LRGB

Technical card

Resolution: 3395x5587

Dates: March 4, 2018

Frames:
Baader highspeed f2 H-alpha: 11x360" ISO800
Baader L 31mm (UV & IR cut): 57x180" ISO400

Integration: 4.0 hours

Darks: ~6

Flats: ~70

Bias: ~75

Avg. Moon age: 17.41 days

Avg. Moon phase: 92.32%

Temperature: -3.00

Astrometry.net job: 1962156

RA center: 98.468 degrees

DEC center: 7.262 degrees

Pixel scale: 6.141 arcsec/pixel

Orientation: 358.666 degrees

Field radius: 5.577 degrees

Locations: Ebenwaldhöhe (Ebenwald 14 Parkplatz), Kleinzell, Niederösterreich, Austria

Data source: Unknown

Description

Finally the HA-RGB out both posted pictures.

To merge the picture I have used pixelmath function in PI.
VERSION original:
R: max((RGB_R*0.72+0.04),(HA-0.09)*1.50)
G: RGB_G*0.72+0.04
B: RGB_B*0.72+0.04

I have combine the RGB with reduced brightness to 72% and some offset.
The "max" function added the HA which is brighter compared to RED value of RGB into the final picture. A higher gain for HA data (1.5x) for high contrast and a negative offset (-0,09) to clip the noisy background of the HA data.

VERSION F: I mixed 33% HA in all channels get some Luminance out from Ha data into the picture.

R: max((RGB_R*0.6+0.04),(HA-0.07)*1.2)+HA*0.3
G: RGB_G*0.6+0.04+HA*0.3
B: RGB_B*0.6+0.04+HA*0.3

I hope I can use this setup much longer next time.
An additional debayered NEX 5 would be useful to make O3 and HA in parallel.

Hope you like it, Marcus

Comments

Author

Marcus1968
Marcus Wögerer
License: None (All rights reserved)
2062
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Revisions

  • Final
    HA-LRGB, 




    

        Marcus Wögerer
    Original
  • HA-LRGB, 




    

        Marcus Wögerer
    B
  • HA-LRGB, 




    

        Marcus Wögerer
    C
  • HA-LRGB, 




    

        Marcus Wögerer
    D
  • HA-LRGB, 




    

        Marcus Wögerer
    E
  • HA-LRGB, 




    

        Marcus Wögerer
    F

C

more contrast, corrected white balance

D

merged RGB and HA with Pixelmath

E

added HA data in all channels form Luminance

F

added HA data in all channels to have 66% of RGB Lum and 33% of HA Lum

Sky plot

Sky plot

Histogram

HA-LRGB, 




    

        Marcus Wögerer

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