M 81 - M 82

M 81, M 82 and NGC 3077 - Bode's Nebula


Date/time: 30.01.2009 23:20 to 31.01.2009 05:10
Az./Alt. positions: 30° / 63° to 327° / 59°
Ambient conditions: -5°C, transparency 4/5, seeing 4/5
¼ Moon, Moonset at 22:00
Location: Aach, Germany

Equipment:
Telescope: TMB 92 SS f/5.5 with TSFlat, without dew heater
Mount: CGE, selfguided with ST-4000XCM
Camera: SBIG ST-4000XCM

Acquisition:
Software: CCDSoft V5
FOV, Image scale: 102.6 x 102.6 arcmin, 3.01 arcs/pixel
Sub-exposures: 2h 20min (14 x 10min) light frames at –35°C
45 x 10min dark frames
30 x 1s EL flats at –35°C
50 bias at –35°C for flats calibration

Processing:
Calibration, stacking, DDP and hot pixels reduction in Images Plus 3.75,
green cast elimination with Pixinsight LE 1.0,
noise reduction with Carbonis Actions,
color enhancement with Gabany´s technique and final sharpening in CS3.

 

 

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