Marcel
Member
I found this strange pattern in my recent images. Like strings that run in a right-upward direction.
I see them in my stacked uncalibrated frames as well as in my calibrated frames.
The pattern is also pronounced in the high rejection map.
See attached pictures of the stacked frames.
This is 45x600 sec stack of S2 frames. Same pattern but less in O2 and Ha.
Camera (Atik 383L+ CCD) was cooled to -15 with an ambient T of abt. 20c
My suspicion is that this has to do with ambient T as I have seen it before in summer but not in winter.
Has anybody seen this before? Any suggestions of an explanation?
Thanks in advance for any help.
Marcel
I see them in my stacked uncalibrated frames as well as in my calibrated frames.
The pattern is also pronounced in the high rejection map.
See attached pictures of the stacked frames.
This is 45x600 sec stack of S2 frames. Same pattern but less in O2 and Ha.
Camera (Atik 383L+ CCD) was cooled to -15 with an ambient T of abt. 20c
My suspicion is that this has to do with ambient T as I have seen it before in summer but not in winter.
Has anybody seen this before? Any suggestions of an explanation?
Thanks in advance for any help.
Marcel
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