September 23, 2017: WL and Ca-K disks (with proms)

[michael.h.f.wilkinson]

Just finished processing yesterday's data. Here are the WL and Ca-K results.

WL, grey scale:

WL, pseudo colour:

Ca-K, grey scale:

Ca-K, pseudo colour:

Ca-K, part inverted:

Ca-K, part inverted + pseudo colour:

Really like the way the proms show up. I used a slightly brighter pseudo colour curve set for the latter image, which brings out more detail in the proms. Best seen at full scale, as ever. H-alpha data to be posted soon.

[Merlin66]

Looks great!

What camera and exposures did you use for the CaK proms??

 

[xtreemchaos]

great shots Michael, clouded out here today, hope you have clear, charl.

[Stub Mandrel]

Why does Ca-K show so much more edge-darkening than Ha? is it because it has to shine though a thicker layer above it?

[michael.h.f.wilkinson]

1 hour ago, Merlin66 said:

Looks great!

What camera and exposures did you use for the CaK proms??

 

I do the disk and proms with the same exposure using an ASI178MM. I typically use something between 0.3 and 0.7 ms, depending on transparency. I just fill the histogram up to 95%. I do stack more for the part inverted shots, typically 1600 out of 4000, vs 400 out of 4000 for the regular disk shots

[Pete Presland]

A fine set of images.