ASI183 M Pro

ASI183MM Pro, bought in Juli ’19.

A single HII-Frame (the object is NGC2174/NGC2175) visualizes the problem.

The below single frame has been taken on March 25 this year. Exposure time was 600 seconds. Telescope was a TEC 140 FL apochromatic refractor, mount an AstroPhysics Mach1. Captured using MaxIM DL 6.22. Calibrated in PixInsight 1.8.8.5 using a master bias made up of 200 bias frames (each of which taken at the same temperature and the same gain settings as the light frame) and a master dark frame, made up of 80 single dark raw frames (each of which taken at the same temperature and the same exposure time as the light frame).

All frames unbinned, taken at -30°C sensor temperature and approximately similar environmental conditions. In all frames, gain was set to “Unity Gain”. Calibration frames taken two to three days prior to light frames.

The strong amp glow at the right side of the frame is very appearent – even after dark/bias calibration. Different settings in the Pixinsight calibration module had some effect but did not completely remove the glow.

Single frame,-30°C, 600 seconds, unity gain, non-linear for visualization

Single frame,-30°C, 600 seconds, unity gain, non-linear for visualization

Linear version (.FIT): .FIT File NGC2174 linear calibrated

The master dark exhibits the same strong amp glow. Take note of the much less prominent – but visible – glow at the top left and bottom left corner.

Master dark frame (80 dark frames, -30°C, 600seconds, unity gain)

Master dark frame (80 dark frames, -30°C, 600seconds, unity gain)

Linear version (.FIT): .FIT File master dark frame – -30°C, 600seconds, unity gain, made up of 80 raw frames

Master bias (200 bias frames, -30°C, unity gain)

Master bias (200 bias frames, -30°C, unity gain)

Linear version (.FIT): .FIT File master bias frame – -30°C, unity gain, made up of 200 raw frames

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