Hi all,
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Location : France: St Laurent sur Sèvre
Latitude : 46°57'34"N
Longitude : 00°53'30"W
Date : 29/12/2006
Hour of Obs : 1h00
Duration of Obs : 3h
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Instrument : SW80ED 80/600
F/D : 7.5
Mount : Heq5
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Celestial body : Horsehead IC434
Magnitude : 11.0
Dimensions : 90.0'x 30.0'
AD : 5h41m00.00s DEC : -02°27'00.0"
Constellation : Orion
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Seeing S: 6/10, good
Transparency T: 5/10
Light Pollution P: 4/10, very present...
Wind : 4, obstructing
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Canon EOS 300D not modified
Time exposure : 480"x18....
manual guiding !!!
Sensibility ISO : 800
Numbers of Dark : 9
Numbers of Flat : 8
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Traditional preprocessing under iris:
- Creation of an offset
- Creation of a median dark
- Creation of Flat
- for each frame, dark is withdrawn and the flat divided
- stellar registration .
- arithmetic addition
Processing under iris:
- DDP
- withdrawal of the gradient.
finition under PSP9:
- reduction of the background noise
- balances white
- contrast/luminosity
http://guillaume.bertrand3.free.fr/i..._800ISO_20.jpg
50% version
Thanks for looking,
Guillaume B.