Narrow band crab

With the start of school, a string of bad weather, and then getting sucked into a writing project when we had the best, clearest skies in several months, September was not very productive as far as imaging. Finally last weekend I got to head to the observatory very early a couple of mornings with a clear sky but a bright moon. M1 happened to be in a very convenient place, and since I have never tried a narrow band version of it, that is what I did.

These were all 10 minute exposures - 8 Ha, and 5 each of SII and OIII - "standard" order. The seeing was at least as good as 4/10. I would like to get a little more SII and OIII, and also try some clear filter on a better night to see if I can sharpen things up a bit. With this image, I did try a pseudo-L by stacking everything and stretching/sharpening as if it were L. I don't know if it helped, but I don't think it hurt. Another processing note is that importing the FIT to photoshop, I used only a sqrt(x) stretch, which is much less aggressive than most of the other options.

Thanks for looking; processing hints and comments always welcome.

Charlie

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