Well it is back to imaging from lovely LP SE London, as unlikely I will get to DSC again for a while (though will try).
Despite this being 8 1/2 hours worth of data and in narrowband it was still noisy and full of gradients.
I even remembered to use my LP filter as was also planning to do some LRGB with same set up. It was however a first quarter Moon but was told that's OK with narrowband.
Taken over two nights:
Ha 31 x 600secs
Ha 4 x 900 secs
Sii 17 x 300secs binned x 2
(took Oiii but there was nothing there)
So processed as HOO
WO ZS71 and Atik460EX + FR x 0.8
HEQ5
I also used EQMod as Roger has shown me how to plate solve (but the platesolving did not work, need to fine tune that). Also I think I have the spacing and tilt finally sorted on my Atik460 and FR. That's only taken me 3 years to sort !!!!
this is VERSION 1 Ha and Sii with the Sii more stretched to make it show.
(https://cdn.astrobin.com/thumbs/3_Vauj0Xgbld_1824x0_wmhqkGbg.jpg)
That's quite a lot of hours Carole ! It's a very faint target to get any detail out of but you've managed to get some by doing that blend. Looks like the filters are producing a few halos and it must have been hard to process. As for the moon, even with narrowband filters it has quite an effect on contrast.
Thanks Robert. I hadn't realised it was a faint object - Trust me.
Yes it was quite hard to process. I am going to have another go at different combinations and colour.
QuoteLooks like the filters are producing a few halos
I think it might be something to do with the scope as a few other people complained about halos with the WOZS71. Pretty sure the filters work fine with other scopes and I have experienced halo's before using this scope/camera combo.
Carole
Wasn't quite sure about the colours in the above, so combined again without stretching the Sii as much as the first time, producing a more traditional version. Still HOO believe it or not, but you can't really see the Sii in this version.
Version 2 a more traditional colour (wish I had done some RGB stars now, might add them later)
(https://cdn.astrobin.com/thumbs/lpf3JJLP3MYe_1824x0_wmhqkGbg.jpg)
3rd Version for the Mono fans:
Ha only, 4 x 900 & 31 x 600
(https://cdn.astrobin.com/thumbs/boST74KJN6cj_1824x0_wmhqkGbg.jpg)
Of the three, I think I prefer the mono version. The SII data seems to be a lot noisier.
Mark
Yes I think the Sii is noisier. I have found that from home only the Ha seems to work well on many targets and I normally have to wait until I go to a dark site to get the Oiii and Sii. They can work on a bright target though but I had no idea this target was supposed to be faint.
Personally I am not a fan of Mono, so my preference is for the Red version.
Carole
Personally I think I prefer Version 2. OIII and SII are usually quite weak so a lot more difficult to capture.
Thanks Robert, I prefer the 2nd one too. I thought I was getting quite reasonable data with the Sii, but certainly the sky backrgound on that it quite noisy.
All I got on the Oiii was a noisy star field.
Carole
Love the red one best , they are all great though.
Roger
Thanks Roger