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Object: Galaxy  M101 in Ursa Major
Date: January and February 2004 (four nights)
Equipment: TEC140 at F/7, HX916 CCD, G11 mount, ST-4
Exposure: L(R+Ha)GB 180:(45+120):45:45 minutes. 
L binned 1x1, R, G, B and Ha binned 2x2. 
H-a data was blended into the red channel using Photoshop's Lighten combine method (maximum pixel value)
Processing: Photoshop, flats, no darks
Comments: The exposure was interrupted by clouds nearly every night it was attempted. Some of the frames were shot through thin clouds.

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Copyright 2004 Paul Kanevsky