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Originally Posted by vlazg
Hi Rick, I keep coming back to this image, stunning.
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Thanks, George!
Quote:
Originally Posted by alistairsam
Thats stunningly beautiful Rick, awesome processing.
between the 20hr, 40hr, and 50hr data sets, did you see much of a difference with additional data, if so in which features?
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Thanks, Al.
The data sets from the C300 at SRO and TEC 160FL at DSW were at roughly similar image scale and provided the full FOV. They were not too different in overall SNR (17x1200s Lum for the C300 and 31x900s Lum for the TEC.) Combining them made a nice improvement but not dramatic. You can get an idea of what the TEC data by itself looks like from the image that Alberto Pisabarro created from it:
https://www.astrobin.com/339138/0/
He processed it very well but the outer areas of my version do benefit from the extra integration time added by the SRO data.
The RCOS data from DSW was from a smaller, high res FOV. It was combined 1:1 with the other data drizzled x2 and only overlaps an oval area in the centre of the image. You might be able to notice a couple of 8-pointed diffraction patterns
The RCOS data has significantly better detail. It didn't do anything for SNR (since I dropped back the contribution from the other data in this area) but it did tighten up the central features remarkably well.
Hope that helps... I'm doing another of these images right now for M51. Perhaps I'll post some of the partial results and describe the process if people are interested. It's always a bit of an exploration. The data tells you what to do if you listen carefully
Cheers,
Rick.