Quote:
Originally Posted by Paul Haese
Looking interesting so far MnT. Did you do a lot of decon on the image?
With regard to SN1987A, I can just now see some colour in the SN1987A. in my data. The two lobes you have there are actually two stars each side of the main remnant. It is coming up blue in my data. The stars are that hideous red colour at present. I have included a 100% crop for comparison.
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Hi, Paul,
Not a "lot" of decon: FWHM was 4.4 pixels (2.4 sec arc) after stacking but before decon. After 5 rounds of Richardson-Lucy (with the constraint that the output should be no darker than the input) it was 3.7 pixels (2.0 sec arc) and that's where we stopped.
What I think our pic is showing with regard to sn1987a is that there's not a lot to see. I agree about the two stars.
Back in 1992 or thereabouts the ring was 1.6 arc sec across, and therefore not resolvable as importantly different from a star at our FWHM. My limited understanding is that what they were photographing back then was the "light echo" on pre-existing material, not an actual shock front.
I've spent about an hour hunting for newer images without success. There's an APOD video, but it's barely documented. It just says it's gotten bigger.
If anyone knows of something even remotely definitive, I'd love to be educated.
Best,
Mike