Markarian

4/22/2011 from Wa'chur'ed Observatory

Imaging scope: AT111EDT w/Televue 0.8X reducer/flattener
Imaging camera: QSI583ws at -15C
Mount: Orion Atlas
Guide scope/camera: ST80/DSI
Exposure: 18 x 240 seconds (luminance only)
Calibration: 32 bias frames, 32 dark frames, no flats
Processing: calibration and stacking in Maxim DL, Photoshop curves and lens correction, Gradient Xterminator, Noise Ninja