NGC1023 This galaxy lies in the constellation of Andromeda. I captured five minute sub frames with matching dark frames and combined them with flat field frames to reduce the effect of vignetting in the final image. I was using a ten inch f/4.8 reflector, a Vixen Atlux mount, PHD auto guiding and an Atik 383L mono CCD camera. The total exposure times were 60 minutes using an IDAS filter, 40 minutes using a H-alpha filter, 40 minutes using an O111 filter and 15 minutes using a blue filter.
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