North America - NGC7000 - Halpha (Daniel.P)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: B355

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North America - NGC7000 - Halpha

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North America - NGC7000 - Halpha

This is my first Narrow Band image.

I select an area in NGC7000.

I didn't plan to publish this test, but I think the result is not to bad.

I am quite impressed by the contrast of NB imaging.

My sub exposures are dominated by Read Noise (25%) and Dark Noise (50%). Next time, I will need to take longer subexposure (or go for lower read noise - higher gain) and cool the sensor down to -20°C or even less.

The only small bad point of this camera for NB imaging is the Dark Signal which need deep cooling to remove. I have measured 0.088 e-/s at -15°C and it seems that the dark signal is only cut by half when the temperature is decreased by 10°C.

Sorry this image was taken without adjusting the collimation of my APO and is very poor.

The processing was done in PI as follow :

- Flat Field Dark Substraction

- Flat Field Integration

- Images Calibration (Dark Substraction and FF correction)

- Cosmetic Correction

- Image Registration

- Image Integration

- Noise Reduction (Demure)

- Nonlinear Image Creation

- HDR (High Dynamic Range) Compression

Final image adjustments performed in Iphoto on Imac (levels adjustements)

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Status	Advanced success
Started	...
Astrometry.net job	1961251
PixInsight job	2UDHP71YG0T6X4ZQAVD1SVNKCPDNVVD6
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	20h59m09s.180
RA (top/left)	20h57m20s.830
RA (top/right)	21h03m07s.626
RA (bottom/right)	21h00m56s.210
RA (bottom/left)	20h55m11s.848

Dec (center)	+43°29′15″.51
Dec (top/left)	+44°08′30″.93
Dec (top/right)	+43°37′17″.87
Dec (bottom/right)	+42°49′52″.85
Dec (bottom/left)	+43°20′41″.97

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North America - NGC7000 - Halpha

North America - NGC7000 - Halpha

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North America - NGC7000 - Halpha

North America - NGC7000 - Halpha

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