Quote:
Originally Posted by SB
Hi Folks,
Suddenly getting AMP glow (more than usual) last night. Shooting Helix Nebula. ASI183 MC Pro cooled to -20C, Unity Gain 111, BIN 1, 120 second subs. Would expect this much Amp Glow at 300 seconds.
Using an Esprit 100 with ZWO Duoband filter.
30 Darks not removing Amp Glow in DSS.
Any suggestions on how to resolve this? Happened once before when shooting NGC 2023.
Many thanks.
Chris.
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Your exposure is too short so the signal from the target is too weak showing up the amp glow more. A longer exposure overwhelms it quite a bit and the amp glow is less intrusive.
I am using 10 minutes Gain 111 -10C and only about 9 darks and it subtracts out well using an ASI183mm Pro.
No bias just darks. I used CCDsoft to create the master dark and to do the dark subtraction.
Are your darks at -20C?
Greg.