North America and Pelican Nebula (HaRGB)


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Instrument :  Minolta 2.8/135 mm lens, stopped down to f/4
Camera :  Starlight Xpress SXV-H9
Mount :  Losmandy G-11
Filter :  Astronomik Ha (13 nm FWHM) and RGB; B frame with IDAS LPS filter to suppress UV light
Guiding :  ST-4 autoguider
Date :  04/05 Aug. 2003
Exposure time :  Ha: 3x30 min, RGB: 2x7 min each (2x2 bin)
Site :  near Baruth, Brandenburg, Germany
Processing :  Bias, dark frame and flat field correction: IRAF; color composite: Gimp
R channel replaces by 80-20% blend of Ha and R, as described in an article by Rob Gendler



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© 2003 Axel Mellinger
Send comments and bug reports to: axm@rz.uni-potsdam.de