June 11, 2023: Sun in three wavelengths

[michael.h.f.wilkinson]

Glorious sunshine, and pretty decent seeing, so I got out the APM 80mm F/6 on my Vixen Great Polaris mount, with Beloptik Tri-Band ERF, and first had a look in white light with the Lunt Herschel wedge and Baader Solar Continuum filter. Quite some spots around, and loads of faculae, so I replaced the EP with my ASI178MM for quick WL image. Seeing was good enough to stack 50% of 2000 frames.

 

WL, grey scale

 

I then switched to Ca-K, and was again pleased with the rock-steady seeing.

 

Ca-K, grey scale:

Ca-K, pseudo colour:

Ca-K, part inverted:

Ca-K, part inverted + pseudo colour:

 

I then switched to H-alpha with the ASI174MM, Baader TZ-4 tele-centric, and Solar Spectrum 0.3 Å H-alpha filter, and proceeded to make a 16-pane mosaic.

H-alpha, grey scale:

H-alpha, pseudo colour:

H-alpha, part inverted:

H-alpha, part inverted + pseudo colour:

Clicking on the images for full resolution recommended

 

[Ibbo!]

Very good.

Milky skies put me off today

 

[Kon]

Nice set of images. The inverted Ca-K is having a nice depth to it.