Daily Image
13-10-2021
Cas A supernova remnant
| Submitter: | Albert van Duin |
| Description: | We had some nice clear nights the past few weeks, so I decided to try to acquire a colour image of the famous Cas A supernova remnant with my 400mm diameter telescope in the back garden in Beilen. Cas A is the brightest extrasolar radio source in the sky, but what would we see in optical wavelengths? In a single 10 minute integration the brightest parts already show, but it needs a lot more to get a reasonable colour image. So 17 ten minute integrations each were acquired through Red and Green filters, 16 through a Blue filter and finally 27 through a Clear (Luminance) filter. These were combined to a colour image using LRGB combination with the PixInsight software. Although this is the result of a total of 12.5 hours worth of integration time, the image is still a bit noisy, so a few extra hours of integration time wouldn't hurt. |
| Copyright: | Albert van Duin |
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