PI Unable to compute noise estimate

Juan Conejero

PTeam Member
Sep 2, 2004
Valencia, Spain
Hi  Jim,

I have made a try with your image, and ImageIntegration does not issue that error. Anyway, the MRS algorithm failed for the green and blue channels, so the error you mention could happen easily with other images similar to this one.

The problem with this image is that the noise is present at relatively large scales. For example, there are noisy structures on the background of the image with sizes similar to small stars. The noise evaluation routines have not been designed to deal with this kind of extreme noise. I see you are taking 10 s exposures. You may want to increase exposure times and/or refrigerate your camera more (if possible) in order to increase SNR of individual exposures.